mark levi 
2005 BMW 5 Series Sedan 545i 4dr Sedan (4.4L 8cyl 6M)
Problematic 545
 The 545 is a beautiful car with speed and handling performance that is exceptional.  However, the iDrive is very difficult to navigate and we had problems with error messages on our screen from the beginning.  There was always at least one and sometimes as many as 3 warning displays.  The dealer was never able to fix them and didn't respond to our continued complaints.  We finally turned it in about 24 months into a 36 month lease.