The NHTSA has issued a recall notice that affects over 360,000 my 2004 - 2010 BMW's in North America. The bulkhead connector for the positive battery cable may be attached "incorrectly" and could loosen, which could lead to the car catching on fire. Sweet.
NHTSA is advising BMW owners to PARK THE CAR OUTSIDE as a precaution, until the fix is made (BMW plans to begin fixing cars in April). We'd suggest that shop owners should heed the same warning... park your customers BMW outside your shop if you have it overnight.