Stay cool.

Air vent control in the BMW 5 Series Gran Turismo.

A constant air flow through the radiator increases air resistance and affects aerodynamics. In the BMW 5 Series Gran Turismo with the straight six-cylinder engine, electrically controlled vents in front of the radiator open and close the cooling air inlets so that the vents are only opened if cooling air is required. When the vents are closed, air resistance is reduced, as is fuel consumption.