Mercedes ML GL R S class no start no ground from ECU to fuel pump relay

Mercedes ML GL R S class no start no ground from ECU to fuel pump relay
In this video I explain a common problem on Mercedes ml gl r s class cars and suvs fuel pump not working fuel pump relay not getting ground from ecu bad ecu and dealer told you need a brand new ecu for them to program solution you can buy a used ecu and clone it with a programmer or go to Karmanauto.com and they can do the job

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Mercedes ML GL R S class no start no ground from ECU to fuel pump relay

2 thoughts on “Mercedes ML GL R S class no start no ground from ECU to fuel pump relay”

  1. hello my friend is what you can help me, I work on a mercedes 500s, when I connect ecu and I put the ignition the fan turns at high speed, the car does not start. What should I do please?

  2. I've got a similar problem with my Bosch PCM, but in my case, the A/C relay socket doesn't get the ground: instead, there is a 4.36V. Is this a case of the faculty ECU? OBD scan doesn't show anything, everything else works as it should. (Hyundai Sonata NF 2005)

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