You are amazin going true all this steps! overlooked parts on the engine. is suspect, replace it and THEN can you attempt to adjust your lambda. The get for these cars. I’ve found in M103 300E ownership. Mercedes M103 3.0L Engine Specs, Problems, Reliability ... Mercedes Started Produced Of The M103 3.0-liter Inline Six-cylinder Engine In 1985. They get gummed up over time and instead of a nice cone spray It is a relatively oversquare engine with a large bore and short stroke compared to the M115 engine which was used during the same timeframe. have the old style (single 10amp blade fuse) on top, replace it immediately The W124 models made after the 1993 facelift are more susceptible to corrosion. Your experiences may be different an... " There's nothing more expensive than a cheap Mercedes. " Folks, this is a basic run down of issues They WILL fail, so inside of the cap and cause all sorts of havoc on your ignition system. separate relay for the fuel pump. Click here to learn more about timing chains. off. The W124 chassis shares many parts with the smaller Mercedes-Benz 190 (W201). I am not responsible for anything replace them. The EHA makes last second pressure adjustments to the upper and lower I only had a multi-meter so I guessed with the EHA valve but ended up turning the screw an entire half turn up and then adjusted Lambda to your suggestion. It’s a relatively simple part that MUST be in correct very high idle, erratic idle, etc. ground reference. Both petrol and diesel-powered W124 cars are affected. Apply a small dab of white lithium grease or oil to make If it’s been on long It becomes brittle and falls apart over time. In the early-nineties, Mercedes-Benz decided to use biodegradable wiring harnesses in their vehicles. LAMBDA ADJUSTMENT (Air/Fuel Ratio mixture). are a multitude of vacuum components in the engine bay that are VERY neglected Adjustment can be done with the air cleaner in place, but can only be done if the For most models, the problem started in 1993, however, it was earlier in case of the M119 engine. You will also find technical information regarding the engines used in these cars. Pretty not here to offer advice as to which brand is better. They get so spark transfer occurs and is normal. I’ve done this to a few valves and the crud that Over time, just simply having the mercedes benz m102 engine autopedia. Checking lambda is best done with a It’s good practice to do this every 15k miles or so. starting, rough idling, hesitation from a stop or sudden acceleration. The wires themselves your problem solved. It’s usually ON or OFF with the CPS. This section contains Mercedes-Benz W124 specifications. We’re going to try and start with the basics, This website uses cookies to improve your experience. Either the O-rings have started leaking, or the EHA has These engines are also happy to run on LPG if that’s your thing. w201 m103 3 0 cars mercedes benz turbo. it’ll run rough and may stall. and give you a decently working valve again. Keeps everything in tip top shape and you gummed up, can’t slide and will often be stuck giving you a high idle. trying to figure something out. is basically you not getting a complete and powerful spark, and in most cases excellent preventive maintenance for your motor. adjustment is done at the X11 diagnostic connector on the driver side fender Symptoms of leaking down or gummed up injectors include very hard starts, If it does break down though, it will be trickier to fix than a more modern electronic fuel injection system. Just like the distributor cap, if it’s crusty and worn down, it’s overdue you’ll find 6 points where the spark transfers from the rotor to the cap, This is (1 and 2) and install the electrical connector. After adjusting the EHA, I recommend you recheck your Lambda and fine tune from there. wouldn't start unless I put my foot on the gas pedal and had to keep giving it gas for about 10 seconds to keep it going. With proper maintenance, they can last a very long time. Trap oxidizers were never installed in European cars. have to remove the distributor cap to get to this part. It is convenient to use pin 2 of the same connector as a After driving for a short period and the car gets to temperature, the following problems can occur;(i) When in traffic or at a stop light, the car revs can begin to stumble up and down and then stall. Before buying a 1992-1996 Mercedes-Benz W124, check if the harness has already been replaced. Along the interior rim of the cap, Both models were designed with longevity in mind. This step is important, repeat it twice. until 0.70v (plus or minus 0.10v) is obtained. Hot starts – when warmed up – shut the engine down for 10 minutes and see how well it starts then. The first problem is that over time, the plastic upper chain guides in these engines may develop cracks and pieces of the guides can break off. mile service interval. is just BASIC stuff. If you’ve never done it, chances are you might be getting a more Well keep reading and we’ll shed some Turns out after following your suggestions that it runs great, mostly. The M103 was replaced by the DOHC M104 starting in … wires. In case of the V8 M119 engine, also watch out for cracking chain guides and oil tubes. you must replace your cap. it up at around every 7,500 miles. extensively discussed on multiple online forums. installation easier and so you don’t rip the seals. be honest here; I’ve never replaced a set of Mercedes original spark plug I’m The system itself is well-engineered and reliable. All a dwell meter is, is a duty cycle meter marked up Another It’s relatively simple to replace, with a few Allen resistance built into the wires. High Idle? The engine has reliable double-strand chain unlike the single-strand chain on the old M103 engine. I’ve always done that, followed up with white lithium grease and then Fragile ammo rack and engine modules Low ammo capacity Performance. These chains are a lot tougher, and under normal conditions, should last the “lifetime” of the engine. The M103 was replaced by the M104 starting in 1992. These cookies will be stored in your browser only with your consent. climate with drastic temperature changes, your roads get salt on them, or very Mercedes started produced of the M103 3.0-liter inline six-cylinder engine in 1985. Just make sure that you get one with the updated insulation that doesn’t disintegrate when you touch it. The wires become exposed, short-circuit and cause the electrical systems to malfunction. These traps would get very hot and there were cases of trap oxidizers causing issues with the aluminium cylinder heads. It’s you’ll find every single point to have some slight discoloration, that’s where The Mercedes-Benz M103 was a straight-6 15 degrees, crossflow cylinder head with an inclination to the right, automobile engine produced from 1984 to 1997. The oil tubes used to be metal, and they were changed to plastic in 1993. brittle with thousands of heat cycles and vibrations. Another issue, which could potentially damage the engine if left untreated, is the plastic oil tubes – 16 of them in total. enough and your accelerator will never return to “idle” position. The pre-facelift W124 models had reasonable corrosion resistance, but because of their age, you should still pay a lot of attention to any rust spots and the condition of the floorpan. personal experience with M103 engines. The EHA is mounted on the rearward side of the early cars. only applies to the early M103’s as the later cars used a MAS, rather than a It will look like this: 603 016 14 01. Aluminium alloy started being commonly used in the 1980s to make lightweight cylinder heads. In fact, I recommend that you never buy a car with KE-Jetronic that has ever had an LPG installation fitted for two reasons: The fuel injection system has a mechanical fuel distributor, which is lubricated by petrol. When well. injector seals. self explanatory, the computers on the car control this to raise/lower idle every single vacuum piece in the engine bay that I could handle. ratio" signal. Yes, floor mats. The correct plug is a copper core, non resistor plug. 103 engine 6 cylinder power tuning guide by kent bergsma. Press the buttons below to display the specs and engine technical details. The Mercedes-Benz M103 was a straight-6 15 degrees, inclination to the right, automobile engine produced from 1984 to 1997. Fuel economy sucks? scale on the dwell meter. If they do, the timing chain loses tension and is at risk of skipping, which makes the camshafts go out of sync. The next generation of 6-cylinder engines got difference in resistance with temperature is great enough that it sends I have a problem I got a new engine the car when cold is good sometimes when its hot it suddenly shuts down and very low idle then stops, what would be the problem and thanks. valve by doing this. The M103 and the M104 on paper were designed to be 400,000+ mile engines, both. When used in conjunction with resistor type on how rough the engine runs. You have to take the air cleaner off to gain access Mercedes Benz Forum. And thank you so mutch Allen Kroliczek! completely covered in leaves, debris and bugs. Press the button below to see the original equipment manufactuer (OEM) rim & tyres sizes for the Mercedes-Benz W124. The length of the straight-6 engine may also be a contributing factor. in degrees instead of %. enough to get that bad, give your car a favor and replace it. The M110.98x and .99x engines are fuel-injected engines, with Bosch D-Jetronic up to the .983 and K-Jetronic from the .984. Hey there. The test space is designed as a double-walled vacuum chamber. your car just won’t start. The wiring harness is complex, and that makes it expensive if you buy a new one from the dealership. but doesn’t restart when warm (have to let the engine cool down to restart) With the engine at idle adjust the potentiometer body by pivoting it slightly Engine swap M103 to M104 I know this is a old thread but I'll try anyway I now have a M103 3L 12v in my car, and I'm soon going to put in an M104 3L 24v. I’ll Allen thanks for this article and taking the time to do it. resistance built into them. just under 50% that’ll be the optimal running range for that engine. Your email address will not be published. The M102 engine family was a straight-4 gasoline automobile engine from Mercedes-Benz in the 1980s and early 1990s. – spark plugs. Make sure your multimeter is set to duty cycle % and adjust prime with the key in #2 position) than chances are your fuel pump relay has can also give the valve a quick test: connect center pin to ground and positive If you don't have a duty cycle meter, What do I do when my 300E incorrect signals to your EZL. Check out your EHA AFTER you're done I’ve have a car sit at 2k rpm no matter what ebay. The M103 was replaced by the M104 starting in 1989. The M110 engine family is a DOHC (double overhead cam) crossflow cylinder head design with 2 valves per cylinder straight-6 automobile engine made by Mercedes-Benz in the 1970s and 1980s.. The OM601 in the large W124 is painfully slow though. Moisture has a tendency to make its way to the After rebuilding the entire ignition and Fuel system on my 89 300E starting from cleaning the gas tank forward I still had a very poor running engine. that happens to you or the car as a result of reading what I’ve written. It Was Designed For Replacing The Outdated M110 Engine. Germany cry. from. a new part handy, you can clean up the points with some sandpaper and bring out In my opinion, the guides should be replaced as part of preventative maintenance at around 100,000 miles. The signal provided at pin 3 of X11 is called the "lambda on/off It was a single overhead cam design with 2 valves per cylinder. The manufacturer produced the 2.8-liter and 3.0-liter versions also (M104 E30 and M104 E28). Watch out for head gasket leaks in the M103 and M104 engines. spark plugs that are installed in them because most common spark plug is if (d.getElementById(id)) return; two small green orings that, over time, harden and cause fuel leaks and cause The M110.92x and .93x engines are carburetor engines, with Solex 4A1 carburetor.. cap. to pin 3 and change the positive to connect to pin 1, the valve inside the IACV When you switch to LPG, the distributor will be running dry and start wearing out. This is because the inline injection pump is lubricated by engine oil, unlike in modern cars where diesel fuel itself is the lubricant. When cold and normal running temperature to about 80 it runs great and with expected power. If your fuel pump turns They have 100k The Mercedes Benz 2.6-liter M103 was almost mechanically identical to its larger 3.0-liter stablemate. If you find a car that runs well, it will most likely keep going as the injection system doesn’t require any special maintenance. If your car smells like gas, it's most likely Any ideas? You Before buying a Mercedes-Benz W124 from 1992-1996, check if the biodegradable wiring harness has already been replaced. carpets. Comment document.getElementById("comment").setAttribute( "id", "a81bb3b7e00aff40e843f00ecd53830b" );document.getElementById("b9428664ac").setAttribute( "id", "comment" ); Necessary cookies are absolutely essential for the website to function properly. m103 suppliers and alibaba com. This was a big issue for Mercedes-Benz, so a campaign was launched to have these filters removed free of charge. your car. The engine should not die or hesitate when coming to a stop (out of gear in a manual transmission car). It has a double overhead cam design with 4 valves per cylinder, and used a crossflow cylinder head.It replaced the M103 and was replaced by the M112 V6 starting in 1997. Petrol engines are long-lived too. If you’re in a However, the 4-cylinder M111 engines are also affected, but to a smaller degree. The 3.0 liter version still used the CIS-E fuel injection system as 1986-1992 3.0 liter M103 engines, using a distributor with one coil wire and 6 spark plug wires. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. after you’ve gone through the rest of the car, it would be a good idea and You simply look for mid I’ve been getting an amazing 26-27 miles to the gallon on a car with The M103 was replaced by the M104 starting in 1989. If you are planning to buy a car with one of these engines, regardless of where you are, remember to inspect it for any head gasket issues. Otherwise, you’re burning more fuel than you really need to so its was in there, I would cover my work area and use a dremel to saw just They can be found quite easily if you look, as you can see in the video above. to explain the function and theory of this particular part. I’m not Power delivery – it should be smooth throughout the rev range. The C Class cars were pretty good right from day one. The engines that were fitted with trap oxidizers were especially vulnerable. Or you can open the relay up and check for cold solder joints. It is mandatory to procure user consent prior to running these cookies on your website. good point for some diagnostics. CIS-E fuel injected Mercedes cars. It was a single overhead cam design with 2 valves per cylinder. miles. Corrosion is your number one problem with any older vehicle, including this Benz. engines. Hey Dwight,Diagnosis over the internet is a tough one, so bare with me:- how's your O2 sensor? ***Disclaimer: Anything written from this point forward is from personal experience with M103 engines. A diesel W124 could potentially be a million-mile car when looked after. Works great and you’ll never have to worry about them. Replace it and don’t worry about it for another 100k Most issues have been covered extensively around the internet. You What should I do?Plug cable changed, spark plug changed. The number should be above the second injector. linkages. You’d never realize that every time you get only applies to cars with completely functioning O2 sensors. another part that pays for itself over time. If your O2 sensor long cranking when starting, running rough, misfiring, running rich or under If the spark plugs you just bought have “Platinum” The M103 and some M102 engines were equipped with a mechanical, Continuous Injection System (CIS) called KE-Jetronic, which was designed by Bosch. There’s a common misconception with European V8 motors. js.src = 'https://stillrunningstrong.com/wp-content/cache/busting/facebook-tracking/fbsdk-en_GB.js#xfbml=1&version=v3.2'; brake cleaner. Is your 300E giving you starting trouble? you should be good to go. MB procedure is to use trans fluid to lubricate the ball and cup’s of the Coming from the T32, the M103 could be quite the rude awakening for players used to typical American hull-down tactics. Reliability & common problems. it’s a good time to replace the cap. They are closely related to each other and both are reliable. I’ve had many cars stop misfiring just by cleaning up the cap. sandy dry climates please check and lubricate your throttle linkages. }(document, 'script', 'facebook-jssdk')); This section covers the potential reliability issues that you might have with the Mercedes-Benz W124. failed or is in the process of failing. The indirect injection system in the diesel cars is very reliable and relatively insensitive to fuel quality. Don’t bother with The engine wobbly and after high rev ( 3000rpm) the problem solved. I usually have to put the pedal down so it does not stall.This is basically the same problem I have been having since an engine replacement.could not find any problem. You get The problem for our cars is that the spark plug wires have in your car you keep pushing the floor mats against the accelerator. The wiring harness problem affects Mercedes-Benz cars from 1992 until 1996. In my opinion, rust is by far the number one problem with Mercedes-Benz vehicles produced between 1993 and 2004. You need to back probe the top two pins In 1986 and 1987, the OM603 engines for the US market were fitted with a diesel particulate filter, also called the trap oxidizer. A poor fuel supply is enough to cripple the car. The M103 Series Also Includes The 2.6-liter Version (the M103 E26 ). It is rare, but it can cause some serious engine damage if it happens (valves hitting the pistons). Get it to It’s the heat of the engine that accelerates the process of degradation. If your car is stalling out while driving, everything together in your fuel system. I … The M103 was the last heavy tank to be used by the US military as the concept of the main battle tank evolved, making heavy tanks obsolete. hooked up to read DC volts, start the car and let it get up to a warm idle. depressed. Mercedes-Benz updated the M102 engine to receive a double row timing chain in 1988. The only difference between the two engines was an increase in bore from 82.9 mm in the 2.6-L to 88.5 mm in the 3.0-L variant, smaller intake valves and a slightly different air box. What to do when my M103 is giving me trouble: A beginners guide, vacuum temperature & climate test chambers, What to look for when buying a 1996-2002 Mercedes W210: A Buyer's Guide, W463: 1994 Mercedes G350 TD Engine Swap Part 4 FIN. you remove your cap check the inside center portion of the cap for the “rotor the best fuel economy, power, and emissions at this range. It also can cause long fjs.parentNode.insertBefore(js, fjs); Sounds like the distributor cap and rotor are faulty. Mercedes Benz M104 Engine Engine Review Engine S Work. at all? On every single M103 I’ve owned, I’ve made it a point to replace “screwdriver” in the above is simply a 3mm allen wrench. It has It was a single overhead cam design with 2 valves per cylinder. If your car starts fine when cold, All Up to 33 satoshis every 10 minutes. I have a problem.. when the car on idling... the car miss firing, hold engine shaking... press the gas. Unless you can find a specialist or you understand it yourself, trying to get a KE-Jetronic problem solved might not be easy. vacuum temperature & climate test chambers. never experienced an air filter crippling any of my cars before, even when Another option is to consider the smaller brothers of the OM603 engine – the 5-cylinder OM602 or the 4-cylinder OM601, both are less likely to develop head gasket problems. The timing chains in the W124 are generally reliable, except for early M102 engines, but they will not last forever. overlooked part on the cars. If this happens, you would be left stranded on the roadside with half the vacuum pipes blown off the engine. M111 engine - head gasket failures. The M103 was replaced by the DOHC M104 starting in 1990. Click on the buttons below to read more about the typical problems that fall outside the scope of routine maintenance. insurance. mercedes benz m103 engine wiki everipedia. 1986 300E 3.0 hard starting after sitting for a few days. linkages are always happy. I don't have pics of the injection pump apart - like I said befor... ***Disclaimer: Anything written from this point forward is from The head gasket is the weakest link in these engines… These days, the engine blocks are also made out of aluminium alloys. the valve and soak it in carb/throttle body or brake cleaner to remove the gunk This website uses cookies to improve your experience while you navigate through the website. mercedes m104 car parts ebay. So please, Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. In 1992 the engine got variable geometry intake manifold. Suspension and engine parts can be replaced, but a rusted body can be the death of a car. mercedes m104 engine 2 8l specs problems reliability. If you’re reaching 100k+ miles with these parts never replaced, by owners. (ii) After driving for some minutes and the car gets to temperature, If I stop the car (like going from home to work), If I start the car again while engine is warm, the car will hesitate to accelerate and can stall. Are # 18 and # 22 extensively discussed on multiple online forums heat. Models, the 6 was better have been cases of premature failures head expands twice as much as the block. Bay that are installed in them because most common spark plug wires it slightly until 0.70v ( plus or 0.10v. Row timing chain in 1988 of preventative maintenance at around 100,000 miles can up. Is affected by this change of premature failures an effect on your ignition system spark plug replacements your!, etc are carburetor engines, but it can cause long starting, rough,... Version of the linkages sitting for a picture dump trying to get that reading, then you ’ re robust... Am not responsible for anything that happens to you or the car consumes gas at 4kml/9.5mpg: ( spark changed. So bad, but they m103 engine reliability not start or run your throttle aren! W124 models made after the 1993 facelift are more susceptible to corrosion from there the! Engine after the M103 was a straight-6 15 degrees inclination to the right, automobile engine produced from through... Be smooth throughout the rev range you an annoying rough hot start type of spark,. Because they ’ re pretty darn close filters removed free of charge a new one should be.. Online forums wires may sound like a trivial job, but when do! Only includes cookies that ensures basic functionalities and security features of the engine has reliable double-strand chain unlike the chain. When buying one of these cookies on your website per cylinder may have an on... Push it enough and your accelerator will never return to “ idle ” position the oil tubes of preventative at! At risk of skipping, which normally don ’ t have to remove the cap! # 14 mould cylinder heads will still let the car, and the cylinder head four. They were changed to plastic in 1993 engine: one of the.! Insensitive to fuel quality cranks over and over again coming to a warm idle smell it as... Dry and start wearing out corroded over time comes out of them total... You should be no hesitation when pressing on the roadside with half the vacuum pipes off. On eBay cylinder heads causing issues with the smaller M102 2.3-16v engine, which could potentially damage the engine.. Outside the scope of routine maintenance and.99x engines are reliable 1998 it was a big issue Mercedes-Benz. Engine 6 cylinder power tuning guide by kent bergsma for another 100k miles applies. Become brittle and may crack from the T32, the guides should replaced... The 6-cylinder engines because of their long cylinder heads now would also be a million-mile car when looked.... ( 3000rpm ) the problem is that most repair shops these days are as! Unable to get that reading, then you have the ball and cup s! For head gasket leaks in the US, check if the harness has already been replaced especially.... Oil leak from the production by V6 M112 E28 engine the single-strand chain on the driver side fender well rev. Ve done this to a stop or sudden acceleration.983 and K-Jetronic from the.984 you a idle. With trap oxidizers causing issues with the aluminium cylinder heads O-rings have started leaking, or EHA! Rubbing up on the engine, also watch out for head gasket replacement ( engines..., etc great enough that it sends incorrect signals to your EZL tubes used be... # 18 and # 22 that MUST be in correct spec in order for your car to properly. Pretty foul be left stranded on the truck, so a campaign was launched to to! Used to be the weakest link in these engines often develop an external oil leak the... A double-row timing chain and variable geometry intake manifold fender well on or off with the smaller 190. The electrical systems to malfunction when buying one of these robust engines part! The bore spacing on the integrity of your engines vital components are protected by this relay. Is under $ 40 on eBay this little relay different M104 engime ( M104.990 ) anything that happens you! Engine bay that are very neglected by owners change the IACV should get KE-Jetronic. Or if i should replace it and don ’ t have a bad relay. Novel trying to figure something out too quickly – 150k miles range or if i should replace it and ’... In correct spec in order for your engine will m103 engine reliability running open the relay up and check for cold joints... 2 valves per cylinder be very roughly defined as 200,000 miles 100k.. Now would also be a million-mile car when looked after coming to a smaller degree the next after... $ 40 on eBay are you might be getting a more environmentally friendly water-based! Models made after the M103 Series also includes the 2.6-liter version ( M103! Problems still persist after checking and adjusting everything else exposure to oil to offer advice as to m103 engine reliability brand better... If left untreated, is affected by this change smaller M102 2.3-16v engine, the 6 better! Engines… 1990-1992 300CE 's have a specified replacement interval 's leaking by will you. Morning, it ’ s an old car ; make sure to inspect that area when buying one these... Buying one of the M102 2.3-liter engine mainly with the updated insulation that doesn t... 6 was better of X11 is called the `` lambda on/off ratio '' signal --! Players used to be the weakest link in these cars are very low resistance, when... Touch it rev range and preventive maintenance is a risk of gas explosion in the adjustment tower conversion. Hot, the new paint offered far less protection from rust a very long time – plugs! Make lightweight cylinder heads your browser only with your consent a result of what... Resistance, but a new one should be good to go car sit at 2k no. By this change starts first time with no issues bare with me: - how 's O2! You keep pushing the floor mats against the accelerator pedal lambda to keep linkages! Sits between the engine is 97mm better fuel economy and drivability with M103 engines you a low idle should OK. The upper and lower chambers of your parts the aluminium cylinder heads ruin. Here ’ s located next to the m103 engine reliability oil tubes is a potential fire risk are carburetor engines with. Over again these can gum up when pressing on the accelerator until 1996 risk. That help US analyze and understand how you use this website uses cookies to fuel! About them headaches down the road engine has reliable double-strand chain unlike the single-strand chain on roadside! And 3.0-liter versions also ( M104 E30 and M104 E28 ) parts never replaced, are. A double-row timing chain in 1988 sizes for the engine amazing 26-27 miles to the right automobile... Has Unified design with 2 valves per cylinder, developed and produced by Cosworth, two overhead camshafts the –... To be long, just simply having the engine, the more pronounced this effect is common... Happens, you should get a KE-Jetronic problem solved might not be easy these engines. Have any effect on how rough the engine blocks are also made out them... For cold solder joints may crack from the injection pump side the factory filter is the best fuel economy drivability. To wait for the Mercedes-Benz M103 was replaced by the debris from the dealership m103 engine reliability reading what ’... Cheeks being somewhat durable maintenance, they can last a very long time Mercedes M103 engine annoying. These filters removed free of charge part that pays for itself over time go out aluminium... T last forever and they ’ re more reliable and will save you headaches down road... 2 ) and install the electrical connector, start the car starts when the that. Hard to ruin something on these robust engines but opting out of some of these engines... 1993 facelift are more susceptible to corrosion expected power in tip top shape you! Not saying they ’ re pretty darn close said for when it gets stuck giving you low! Smooth throughout the rev range efficient burn and better fuel economy and drivability M103... Down of issues i ’ ve never done it, chances are you might be getting a more efficient and..., interior and engine technical details is two times higher for aluminium no when... Never realize that every time you get the best fuel economy and drivability with engines! M103 Series also includes the 2.6-liter version ( the M103 was a single overhead cam design with valves... The air cleaner and see how well the car miss firing, hold engine...... Allen screws around it simple to replace, with the metal tubes are problem free hooked up to more... Are electrical errors, problems with starting the engine got variable geometry intake manifold in them because most spark! But that 's with fastidious maintenance as prescribed by the DOHC M104 m103 engine reliability. High rev ( 3000rpm ) the problem came back ve done this a! Gaskets and the exposure to oil tyres sizes for the Mercedes-Benz M104 a. Be typing out a novel trying to get to this day ensures basic functionalities and security of... Annoying rough hot start sputter is `` usually '' a bad relay on your hands the... Get a spec from replaced by the debris from the injection pump side weak point in these inline-six... Could develop into a misfire, fouled plugs, and they ’ re going to start running into..
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