amjad2013

Hi All,

My car crank but can't start, the same thing happened to me about two years ago so that time, I just disconnected the battery to reset the power and then connected the battery again then my car started.

Today, I have the same issue the car crank but can't start I did the same thing that I did before but didn't work for me.

I think that the fuel is not coming to the motor, so I want to check the power circuit including relays and fuses of the fuel system.

Any recommendations? where can I find the related component of fuel pump system? or any other suggestions?

angrybober

If it cranks but not start, it is probably the fuel issue. Check the fuses: 4,6,19,23,27,42

http://www.mercedesmedic.com/c-class...ayout-diagram/

If it not help then - I had the same issue, the problem was with gasoline contamination with diesel fuel on the gas station. I had to tow the car to the dealership and flush the lines and new crank shaft sensor.

Or check the plugs, maybe they are dirty, but I don't think that all 6 of them. If you had only one dirty you would still start the car and get Check Engine light as it would work only on 4 cylinders. Only if it not the 1st spark-plug.

Cylinder info:

https://cimg3.ibsrv.net/gimg/www.mbw...0dc6f0f102.jpg

firing Order: 1-4-3-6-2-5

amjad2013

Hi angrybober, thank you for your feedback.

I checked the voltage on the fuel pump which was 12 Vdc while car key on position 4.

So the electrical circuit was ok, then I called the technician to check the pump operation and he replaced it due to malfunction operation.

By the way, I replaced the pump with fuel pump called VDO its a Germany made (Siemens sister company)