c300 2010 making a whining noise simular to a power steering pump whine...what can it be?

Asked by Jan 01, 2015 at 10:43 AM about the 2010 Mercedes-Benz C-Class C 300 Sport 4MATIC

Question type: Maintenance & Repair

2 Answers

10,620

It could be any of the pulleys that the belt drives. ac, idler, tensioner, water pump, alternator etc.

8,355

I recently had the exact problem - I thought it was the power steering pump. Took it to Mercedes. Turned out it was a high pressure line or fitting. Sorry I don't remember which one it was. I think it was one of the air pumps.

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