A good local detailer is your friend. For special detailing issues I have learned to let the pros deal with it. I scratched a rim (rim rash from hitting a curb) and found a local guy who preps the Maserati and does work for the local BMW and MB dealership. Had it done in a couple of hours and couldn't even tell.

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2007 X5 3.0 Alpine, Tobacco, Dark burl, Prem, Sport, Tech, Rear Climate, 3d row, Running boards, Ipod.

2006 530i Amythest Gray, Sand, Dark burl, Sport, Comfort seats, CA, Sat and best of all 6 speed.

Retired:
2007 X3 (auto)
2004 Z4 5 Speed, Sport (RIP)
1995 325i
1989 325i