Correct me if I am wrong but I believe MB has a bulletin on this one that dates back a year or two. I had mine fixed during the warranty period not requesting to have it done, an automatic replacement triggered by a service bulletin I believe...

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2000 ML320 48750 miles
Stout 1974 BMW 2002 245,000 miles
Stout 1997 Volvo 960 Wagon 69.000 miles