HI MB World!.

I'm having issues with my C220 CDI 2008 and the dealer cannot tell me what it is or is hiding something.

When I run the car for several minutes beetwen 100 and 120 Kph the check engine light turn on, but nothing in the performance seems to differ and the light stays on for about 1 or 2 days.

Also randomly when staring the car in the morning: the exhaust blows dense grey smoke for several minutes but nothing appears in the dashboard.

I've borrowed a friend scanner and it tells 2 memorized events:
200C Check components B6/1(Camshaft Hall Sensor) and L5 (Crankshaft Position Sensor). Wrong Signal assignment from Crankshaft and Camshaft.
AND
200B B6/1 (Camshaft Hall Sensor) Missing signal from camshaft.

Any advice will be really apreciated. Thanks!

 

Looks like a bad sensor to me. If the dealer doesn't have any better ideas, and they saw these codes when they diagnosed the car, then they are most certainly practicing business as usual and BSing you. Take it back with the light on and a printout of those codes. Demand that they replace the necessary sensor or find out what the problem is otherwise. The exhaust problem I have no idea about. Check your fluid levels - generally dense gray smoke would mean you are leaking coolant into the cylinders.

 

The smoke is likely just incomplete combustion while cold & will not be helped by the engine crank & cam sensing messing around. You almost certainly have a bad or unplugged sensor.

I find it amazing that the car is storing these codes but the dealer can't diagnose the problem with their Star.

As acr says. Tell the idiots what is wrong & tell them to sort out the sensors.

 

Take it back to the dealer and tell them you have a defective cam sensor, is very comun for the cam sensor to go bad.

 

Note this is a diesel - so less common.

 

The cam sensor tells the computer where your cam is in it's rotation. The info is used to determine fuel timing delivery.

 

Understood. They just don't suffer the level of sensor failure that petrol models do.

 

Please keep informed of the outcome.

Where are you in Aus or Europe ?