Hi,

I have a ML230 European and 5 Emissions -Failed this year.[/align]
I already change O2 sensor, catalytic converter, spark plugs and MAF
[/align]I spend much money replacing the components and for what?
I already send the car to mercedes and no one can tell me what the problem is[/align][/align]Value of Lambda sond > betwen 1.06 and +/- 1.15 Must be <=1.03 - Emission test failed

I think is one thing its strange
When the throttle is on 4.000RPM and the car stoped the engine goes up and down. +/- 500RPM up and +/- 500RPM down. Its normal?

Could you help me please?
Thank you in advance[/align]

 

Crankshaft Position Sensor needs to be replaced.. Had exact sameproblem with 04 W163. Replace Cam and Crank sensors.