GLK Fuel Pump Issue

My 2009 Mercedes GLK with a gasoline engine is giving me fits. It only has 31120 km on it. The engine won't start sometimes, stalls out at idle other times, and the check engine light is on constantly. It also seems to be running rough and guzzling gas like crazy. I pulled the codes and it's pointing to a fuel pump issue. Could it be as simple as a bad connection, like a frayed wire or loose plug? Or am I looking at a full gasoline delivery pump failure?

4 comment(s)

Sounds familiar. I once had a similar issue with my old Opel Corsa. Engine stalling, check engine light, the whole shebang. Have you checked the fuel injector relay? Could that be causing the issue, maybe even before condemning the pump itself?

Fuel injector relay, huh? I hadn't considered that. Where exactly is that located? And if it was the relay, wouldn't that throw a different code than a fuel pump error?

On my Corsa it was in the engine compartment fuse box. I am not sure for your Mercedes. As for the error code, maybe, maybe not. Could be worth checking before spending a fortune. But honestly, with those symptoms, I would suggest taking it to a workshop. They can properly diagnose it.

Thanks for the advice! You were right, it was more complicated than I thought. Took it to a mechanic, and it turned out to be a faulty connection at the fuel pump, just like I suspected! Repair cost was only 95€. Appreciate the help!

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