Hi,

I have a mercedes w203 240 (V6 2.6L). About 105'000 miles / 170'000 kilometers.

This summer my CPS (crankshaft position sensor) broke down. The mechanician changed it for a new one, but since.
I have severals problems:
-The car has less power than before
-Sometimes, when I stop myself at a STOP or a traffic light (car cold or hot) at the end of the braking, the engine turn off and right after that turn back on. Or sometimes, when I'm at 0 speed and I want to move I push the accelerator and the car doesn't move at all, like if he was hesitating to going on and slowly the car moves.

I check severals times the car with the MB star but nothing nothing no faults at all.
I changed again the CPS and try it with the air flowmeter disconnected and the car did the same thing. I also chaco the throttle body with the Xentry/DAS but it's ok for him.

So I don't know what to thing... Fuel Pump ? Throttle Body ? Rear SAM ?

Does someone already has same symptoms on a similar engine / car ?

Thanks for your help.

Did you check all the vacuum connections? I know from having done the CPS swap myself, that there is potential to knock a lot of stuff loose around the throttle body area if you aren't pretty careful.