It would be worth cleaning the Throttle valve...also called a slide valve.
on he W203 its at the front of the engine (not close to pedals)
They actually sell a spray for cleaning these things, Its a solvent.
If the valve is not seating correctly you will get many errors and the idle/acceleration will suffer.
Good Luck
Joe
on he W203 its at the front of the engine (not close to pedals)
They actually sell a spray for cleaning these things, Its a solvent.
If the valve is not seating correctly you will get many errors and the idle/acceleration will suffer.
Good Luck
Joe