What happens when the engine is cold in a Mercedes?
I bought the car with a “little engine problem”: when the engine is cold, in “drive” it runs uneven, symptoms like a cylinder has a misfire and the car shakes. When the car is warm (180 F aprox. 80 deg. C) it runs fine, it accelerates smooth and everything is OK.
What should I do if my W203 C class transmission fails?
The fix for a transmission contaminated with coolant is to: The typical symptoms of a failing radiator seal are harsh gear changes and humming/droning noise during light acceleration up to 2500 RPM. Definitely look out for this when test driving a W203 C-class made before 09
Why are the radiators on my Mercedes W203 bad?
The faulty radiators were made by Valeo and had a problem with an internal seal that was supposed to separate the coolant from the transmission oil. A failed seal would release the coolant into the transmission oil circuit. This oil/coolant mixture can ruin the transmission if not flushed quickly.
Are there any reliability issues with the Mercedes-Benz W203?
This section covers the potential reliability issues that you might have with the Mercedes-Benz W203. Click on the buttons below to read more about the typical problems that fall outside the scope of routine maintenance.
How to troubleshoot a / C compressor clutch problems on your Mercedes?
This video is helpful if you are trying to troubleshoot air conditioner problems, the A/C compressor clutch in particular. This opens in a new window. Start by turning the engine on. Set the AC to maximum cold setting. Open the hood and look at the serpentine belt to locate the AC compressor.
What makes a Mercedes C class run Ruff?
Dirty injectors ( irregular spray pattern, fuel comes out in a stream instead of a fine atomized spray) that will sure to make the car run ruff and run rich 4.
When does the a / C compressor start to work?
Once you turn on the AC the center part of the compressor, the AC clutch should engage and start to rotate with the pulley. The serpentine belt rides the A/C compressor pulley every time the engine runs, but the A/C compressor is working only when the A/C clutch engages it.
Why does my Mercedes C class run rough off-idle?
21 people found this helpful. Hmmm, so what you’re saying is it idles ruff but passed that part of the test and runs smooth off-idle but fails that part because it’s running too rich ( too much fuel). If you had a vacuum leak at the throttle body you’ll be running lean not rich as you are now.