i have a 2007 ml350 and a couple days ago start to make a loud sound coming from the power steering pump … does it for a few minutes then stop … need some answers plz

Asked by Feb 25, 2015 at 09:25 AM about the 2007 Mercedes-Benz M-Class ML 350 4MATIC

Question type: Maintenance & Repair

6 Answers

2,395

just to cover the basics you checked the fluid right? and is the sound a squeal or is it a whine?

sound more like a squeal … is it bad ?

2,395

no you may just need a new serpentine belt. i would start with that

awsome I'll do that then … thank you very much

2,395

no problem at all. i hope it works out for you. if you have multiple belts and changing that one doesn't help try changing the others as well. its your cheapest option and should be your problem. belts start to squeal when they start to wear out and if left unattended they break leaving you without power steering, an alternator to charge your battery, or a water pump to cool your engine. 2/3 will leave you stranded

10,125

I had the EXACT problem with my 2007 SL. I was sure it was the power steering pump or belt. Turned out it was an air pump or valve that connects to it. Sorry, I can't find the work order to tell you the exact item to look at. I took it to Mercedes in case it was a simple problem that they would recognize right away rather than risk a lot of labor and unnecessary parts charges at a local mechanic. That turned out to be the right choice.

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