It seems like half the people who have the ML had some problems and the other half don't. My advise is to take the vehicle that you selected at the dealer out for a long drive, carefully inspect the car bumper to bumper and buy extended warrenty if you plan to keep it long. My take is someone always get a lemon for anything you pay money for. I have heard some pretty bad stories on BMW quality as well. May be thats why people nick named Bimmer as Break My Wallet?
98 Kawasaki 1500 Vulcan Classic
97 Yamaha Virago 535 Special
98 Maxum 2800 Sundancer