Just got my 6th BMW, which is a 750ix. I have had problems with gas leaking from the first week that I drove the car out of the dealer's lot. It occurs intermittently when the car is stationary or parked. Unable to park the car in my garage or underground office parking lot. The odor is severe due to the gas leakage and despite multiple attempts by the dealer nothing has helped. Obviously I am not driving the car due to safety concerns much to the surprise of my neighbors the car was parked out and not in the garage! Have you guys ever experienced anything similar in your 2010 750ix?