samanthaat 
2005 BMW 6 Series Coupe 645Ci 2dr Coupe (4.4L 8cyl 6M)
Unreliable starts
 At first I loved this car. I'm a low mileage driver and BMW tells me the car is meant to be driven a lot. If you don't drive it a lot this car is a life of hell.The BMW dealer told me if I don't drive it at least one day a week for an hour the battery will die. He said there is too much draining the battery. It's not a week though.Seven starts drains the battery.I keep it on a trickle charge, but that apparently doesn't keep it from draining. Afterthe battery drains a couple dozen times, its time for a new battery which today cost over $500.That's not acceptable but what is really unacceptable is having an $80,000 car that leaves me stranded and calling AAA once a week.