First the really great news...!! My Power Steering system is COMPLETELY
quiet. When I drive in any gear and up-shifting and/or down-shifting, you will only here the low deep purring sound of the V8 engine.. NO WHINE WHATSOEVER...!!!
My former 2001 ML 320 and my current 2005 ML 500 always have suffered from power steering whines. One of the main reasons for trading my former 2001 ML 320 was it's very bad and horrible whine and the inability of the MB dealer to fix it. No matter what was changed: power steering pump, steering rack, etc; the noise was always there. My 2001 ML 320 whine was very bad, and it was just not a good feeling to drive it or to turn around with it.
My 2005 ML 500 is around 47,000 miles, so I got the dealer to perform the 50,000 mile Service B. This service included flushing the Brake system and the Power Steering system.
Somehow the power steering service messed up my power steering pump and the pump became very noisy again.
The dealer decided to try to fix the issue and, at the end, the service manager and the mechanic decided to change the power steering pump for the newly desiged power steering pump.
GENTLEMEN (LADIES)..!!, this newly designed pump changes completely the whole perception of your engine and the way the ML drives. You just hear the tire contact with the road and the engine purring away. NEVER I had driven an ML this quiet on the road..!! EVER...!!!
By now you all know me and how I really dislike bad services or when things work half way or are broken........ WELL..!!
I really have to recognize the "Mercedes Benz of Houston-North" dealer for the incredible service and the good will to put my 2005 ML 500 into it's best shape ever, and worth it of a Mercedes Benz drive and feel. Kudos to Mercedes Benz of Houston North
and to his service manager...!!
If you have a bad case of power steering whine, and which is not caused by your power steering rack, then make sure you install the newly designed power steering pump and done professionally by an experienced MB mechanic. No whine driving at any gear and/or down/up shifting....
Disclaimer : This does not mean that my ML will not die today or tomorrow.. It just means it is working incredibly great today and worth every single dollar of those $28,000 lost in the depreciation over these last two years... I love my ML when it works as intended..!! and today I will leave it in this very satisfied and happy note..!!