my C250 diesel sport mb, will not start. i have disconnected the battery and refitted it. engine turns over, but will not fire up. there is no fuel supply to the engine, from the injector. is there a cut off valve or immobiliser that needs resetting? any suggestions will be greatly appreciated. many thanks.

 

Have you changed the fuelfilter lately?
Is your fuel pump working?
Shan.

 

thanks for the reply, the car was running fine until i took the battery off.
so i dont think that it is the fuel pump.
but thank-you for your intrest. any other suggestions?

 

number 1, try to never power down your car when changing battery. this causes all kinds of issues sometimes. should keep it powered through the jump start terminals or jumpers to the batt cables while changing.(tricky but doable).

did problem begin after you disconnected batt?

you need to see if you have start authorization via DAS. (drive authorization system). if car thinks its being stolen it shuts off fuel. have it scanned with SDS.

also have seen bad CKP sensors on older ones.

 

did u ever start the car...i am having a similar problem on my own.

 

When the temperature falls below freezing my car will keep cranking but not fire-up. When its 34F or above the enging starts and runs fine. Anyone have any thoughts?