S Klasse Hybrid Engine Problems

Fuel pump failure on a new S Klasse? That's rough. I had similar symptoms on mine (not the hybrid though). Engine stalling, rough running... you name it. Did you check the fuel injector relay? Have you done any automotive diagnosis on the gasoline delivery system yourself yet?

Fuel injector relay? I hadn't considered that. Where is that located and how would I test it? Is there anything else it could be before I start ripping things apart?

The relay location should be in your owner's manual, or easily found online. But honestly, with those symptoms and a stored fuel pump error, especially on a hybrid, are you sure you want to mess with it? The high voltage system adds a layer of complexity. Consider having a workshop take a look. In my case, the pump was gone.

Thanks, I appreciate the insight. Ended up taking it to the shop as you suggested. Turns out it was indeed a bad connection to the fuel pump, just like I suspected. Cost me 95€ to fix. Thanks again!