Talk to the area service rep.
Before a Mercedes dealer sells a car they do a 120 or so point inspection of the car.
1 this should have had the wheels checked.
2. they sold it to you and the first time the wheels are removed you have a problem.
Not a very good check of the car. Not a very ggod reputation for there dealer. The over torquing of the lig bolts can warp the rotors and is incorrect.

Again call the dealer and ask for the area Mercedes reps number. explain the situation and see if he can help. Then if nothing happens call Mercedes Benz USA and *****. 1800 FOR MERCEDES

Dave

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1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car