2012 Mercedes-Benz ML550 problems

Filed Oct 27, 2026 · Fuel system · MN

*2012 ML550 benz fuel pump control module Re: Formal Demand for Repair – Fuel Pump Control Unit Replacement Vehicle: Mercedes‑Benz ML550 VIN: [XXX] Recall: the federal safety agency Recall Campaign No. XXX To Mercedes‑Benz USA: I am submitting this formal demand for repair of the cost to replace the fuel pump control unit in my Mercedes‑Benz ML550. The vehicle stalled without warning while in operation, creating an immediate safety hazard. A certified mechanic diagnosed the issue and confirmed that the fuel pump control unit was reporting a fault through the onboard diagnostics system, accompanied by an illuminated check engine light. Due to the intermittent nature of the defect and the risk of sudden failure, replacement of the fuel pump control unit was the only available remedy. During my extensive research, I become aware of the federal safety agency Recall Campaign No. XXX, which identifies defective fuel pump control units in this vehicle model. The failure I experienced, the diagnostic findings, and the circumstances of the stall are consistent with the defect described in the recall. I purchased this vehicle from an authorized Mercedes‑Benz USA dealer, and my personal contact information was collected at the time of sale. I did not receive any recall notification from Mercedes‑Benz USA. As a result of this failure to notify, I strongly recommend repair expenses should be covered under the recall campaign. The defective fuel pump control unit was identified by the mechanic after the symptoms and diagnostic information acquired. Thanks you INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Mar 15, 2023 · Driver assistance, Electrical · RI

In the last year, randomly, when starting the vehicle, the yellow check engine light comes on. Turn the vehicle off, it is gone. The side view mirrors have the yellow lights lit up on them when driving down any road, the red warning lights that tell you there's something behind or in front of you start going off for no reason while driving down any road, all the "safety" and lane assist features seem to have a ghost controlling them. The radio will also glitch out from time to time. It will swap through the channels or pull up list of channels when there is Nobody in the vehicle messing with it at all. Yesterday, I received the message that the backup assist was not working and another about lane assist not working. This morning, both messages are gone and things seem to be normal. This is very distracting! I've been on the highway, in the high speed lane and my alert is flashing and loudly sounding. It startled me, caused me to abruptly slow down and start looking all around; I was concerned someone was about to hit me or worse, I was about to hit something I couldn't see; it turns out there was nothing in front of, behind or around me at all. This needs to get resolved, asap. It appears to me to be a computer/electrical issue. It seems that there are many others complaining about very similar issues! Come on Mercedes-Benz, let's put out the recall already! The dealership just says "unless it's doing it while it's here, there's not much I can do". Of course it is never doing it then! Unreal!!!!