I have a 1995 Mecedes c-280. I need help figuring out what is going on with it. When im stopped at a stop light my entire car actually begins to shake. Also my exhaust is in severe need of changing. I want to put a more sporty sounding exaust because my current one is done and since im doing it anyway what would you guys recommend?

 

hm don''t know about the shaking? it's an automatic? did it always do this? for exhaust get superpsprint. magnaflow would make it really loud;p

 

18 with a small budget, you are in the wrong forum and have the wrong car. Sorry, TC

 

I've done a lot of work my self that's why im able to have a small budget. I just want to know what that shaking problem is.

 

answer my questions please;p makes it easier to find out, could be alot of things. maf, wiring harness

 

Have you checked for codes? How many miles? Engine and transmission mounts ok? Has the wiring harness been changed? What have you done in terms of troubleshooting the problem so far?

How good are you at fixing problems on this car? To be successful with owning one of these cars you have to be very resourceful, have above average technical skills or else have a well padded checkbook and you already said you don't have a big budget.

 

is it the motor shaking like a misfire or is it the car shaking? could be the motor mounts...dunno...just throwing in two cents worth...

 

It is really weird The car will only shake when I'm stopped and the car is in drive or reverse as soon as I put it in neutral when that happens it clears up.

 

all m104's do this abit, feels like the car is pulling a bit right? how many rpm does yours do at idle?

 

How good are you at fixing problems on this car?
-----------------------------------------------------------------
Kizi 6

 

My car has a W202 engine

@w202mylove: The RPM's idle at about 600 when it is acting normal but when it begins to shake (its not a subtle shake it acts like a wild animal in a cage) The RPM's drop to 450 then jump to about 700.

@ledatptit: Well I changed my starter motor, tie rod assembly, wiper motor, entire emergency brake system, about to be changing the entire exhaust system because it is leaking pretty bad (too much work to just patch it up) I've also been doing a lot of body work. I'd say if I can find access to a lift(which I can) and find the problem I'll be able to fix it.

 

hm alright, 600 is normal btw. uhm have you tried to unplug the Maf? also could be the sensor at the cats is sending wrong information to the engine, maybe cats are broken? also could be the beginning of an old wiring harness dying. the strange thing about your problem is that you don't notice any problems while driving. could be so many things that cause this.

 

To be completely honest I never though to check the MAF... Also I have never heard of the "cats" what are they?

 

Catalytic converters srry

 

I need to change that plus my whole exhaust system anyway so that may solve the problem?

 

very unlikely but yes, the sensors at your exhaust system might be sending wrong information to the engine due to bad Catalytic converters. First thing check/ maf. could be so many things, start a check list lol. could be maf/cats/even sparkplugs/wiring harness(most likely)/ wiring of the ETA (electronic throttle body). maybe it's the gearbox/torque converter? Wish I could help but this could be so many things, the m104 aint the easiest engine to work on.

 

I've had my wiring harness checked its all good spark plugs have just been changed. Is a gearbox/torque converter expensive?

 

depends on where you buy it used or new, I'm not sure if it is the converter, ask an expert about this I only know about the engine, doesn't seem like there is any problem with the engine since you say it runs nice whili driving. I really would like to know what the problem is with your car, it breaks my head ;p you can always post you problem in the 202 amg section since there are many people with c36's wich is almost the same as the 280

 

when I bought the car the guys said it was a w202 engine. could that be casueing the problems?

 

w202 is the name of the cars chassis al c class from 1993/2000 are w202. your engine is the m104 straight six

 

Ok then the guy was weird and probably confused. I bought my car for $50 fixed it enough to pass a safety and e-test. Now I'm working out all the kinks because I love this car.

 

Do you want me to let you know what the problem is when i figure it out?

 

I know this is 100% motor mounts. If it is shaking in reverse etc it is motor mounts. Replace them. They are most likely collapsed. Buy Lemforder.

 

Have you had this happen to a car of yours? Also are motor mounts expensive?

 

Here a DIY vedio to test a see if it is you mounts....


Here is a DIY for how to replace the motor mounts......Good Luck