I have a 06' CLK 350 where it suddenly went to hard starting to only starting when cold. Now the car does not start at all. When the car was running the fuel pressure was around 30 psi. I suspected a bad pump but measured the voltage to the pump between the two thicker wires (solid brown wire and black/green wire) The voltage was .5 volts with the key in the on position and 10.75 volts when attempting to start.
Does anyone know where the fuel pump relay location? Here are some images of the project.
Does anyone know where the fuel pump relay location? Here are some images of the project.