Here is the list from MB.

http://www.startekinfo.com/StarTek/outside/12264/disc_2/Program/Chassis/rearaxle/function185.pdf

I've been getting whine from my car for years. I've changed fluids and had some change in noise (less). Tires seem to make a difference too.

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07 E350 4Matic wagon, 06 S430 4Matic, 99 SLK 230
retired W210 (x3), W124, W126