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Close the windows and glass sunroof
Driving with the glass sunroof and windows open results in increased air resistance and raises fuel consumption. ...

Closing the hood
Closing the hood Drop the hood from a height of approx. 16 in/ 40 cm. It must be clearly heard to engage. Hood open when driving If you see any signs that the hood is not completely closed ...

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- ...