Quote Originally Posted by RemoLexi View Post
I hate to disagree, but I have yet to see a 112 motor act this way due to a EGR problem.

Sounds like a vacuum leak. How do your brakes feel? The booster hoses broke often, but you wouldn't have brake assist
I was merely guessing same when i made the diagnosis and replaced the parts , The c280 i owned was M104 and not 112 it had about 190,xxx miles when sold.

Quote Originally Posted by TugaMerc View Post
Brakes are great, no problem. This seems more like a problem setting idle at startup. It is random and happens whether the engine is hot or cold. To counteract I just give the accelerator a small stab and all is well. I'll start by changing the fuel filter, cleaning throttle body and checking the breather hoses. If that doesn't solve the problem I'll move on to other stuff. Is the fuel pump suggested before a possible culprit? Does Mercedes recommend its change? the car is a 99 vintage with 107k miles on the clock.

The fuel pump and filter were changed at 125,000 miles on my C43 and at 180,000 on my c280. The c43 i didnt own when the job was done but since its a dealer record im sure it didnt need to be done. When i changed them on my c280, The filter was deff in need of change. but the pump questionable. I only had failed turnovers on cold starts and never after the car had been warmed up. I think dealer recommends the fuel filter at 50,000 intervals, and the pump at 120k . but i could be wrong. maybe remo can chime in on this as i know he will know better than i do.