2008 BMW 5 Series 535i 4dr Sedan (3.0L 6cyl Turbo 6M)
Bought new in April, has been in the shop at least twice a month every month since then transmission problems (wouldn't shift into reverse) computer problems with the iDrive, check engine light/oil/coolant lights comes on with regularity, rough starting - attributed to carbon build up on the valves, cleaned 300 miles ago and now back again. Very disappointed in my $60k car, and find no help at the dealership either, phone calls go unreturned and requests to have BMW USA involved have been ignored so far. I was so excited to get this car, and now it has turned into one of the worst decisions I ever made
Paddle shifters, heated seats.
Make it work reliably. Fix the turbo lag, really noticeable between 65 and 80mph.