powersteering pump whine when cold
Thread Starter
Junior Member
Joined: Sep 2019
Posts: 34
Likes: 2
2002 AMG C32
powersteering pump whine when cold
When I first start my 2005 C55 in the morning, the power steering pump whines, and doesn't work very well until the car has been running for a few minutes. Then the whine goes away and everything works fine. Anyone else experience this? Is my power steering pump starting to fail? Any solutions?
Thread Starter
Junior Member
Joined: Sep 2019
Posts: 34
Likes: 2
2002 AMG C32
Super Member
Joined: Jun 2015
Posts: 503
Likes: 38
From: South Africa
2004 CLK55 AMG W209
The air pump whine is normal. The p/s one is not gents. Guys on our forum have drained fluid and filled new. Use agents MB fluid and flush the system out. Best is remove the return hose and cap. Start engine and continue filling new fluid until clean fluid comes out the pipe then have a second person stop the engine. Top the fluid off then rotate steering lock to lock few times whilst the engine is running. Stop engine again and check level. The groan should be gone then. I use this green fluid that comes in a silver tin. Pretty sure its from America but its way better than any other fluid. Cant recall the name though.
Junior Member
Joined: Apr 2013
Posts: 38
Likes: 1
From: Belgium
C32 ///AMG, C200 CDI
Use only Pentosin CHF11 fluid and be sure to keep the level topped up. A low level van give the exact symptoms you're describing. Also if you can perform a quick change by sucking out the reservoir and repleneshing it and repeating as necessary to freshen the fluid.
