Dave 
2008 BMW 7 Series Sedan 750i 4dr Sedan (4.8L 8cyl 6A)
Better know good mechanic
 Nice driving car, especially on longer trips, but high maintenance.  Oil leaks started just after 50k mile warranty expired and grew over time.  Very expensive to repair.  Even at an independent shop estimate was around $4K.   Several other expensive repairs - AC blower unit (twice), a window motor, and the electronic parking brake actuator (twice) .   Brakes are great, but costly to replace.  You generally have to replace rotors, not just pads.  Even the battery for this car runs close to $500 installed.