See also:

BMW X5 xDrive50i: BMW's Twin-Turbocharged V-8.
The new BMW X5 xDrive50i takes its place as the flagship of the X5 family, yielding 400 horsepower at 5,500 rpm and 450 lb-ft of torque at 1,750 - 4,500 rpm from its twin-turbocharged 4.4 liter V- ...

Switching off automatically
System switches off: above approx. 9 mph/ 15 km/h. Switch on the system again if necessary. ...

Safety
The BMW 5 Series has earned Top Safety Pick status from the Insurance Institute for Highway Safety for top scores in frontal, side and rear crash tests and a roof-strength test that reflects rollo ...