Patent ID: 8424957

Claim:
A method for operating a motor vehicle, the motor vehicle having: a wind deflector arranged adjacent to an upper cowl and being adjustable between a retracted inoperative position, a maximum extended position extended above the inoperative position and an intermediate extended position between the inoperative position and the maximum extended position; a roof arrangement behind the wind deflector and being movable between an open position and a closed position; a rear air-guiding device behind the roof arrangement, the rear air-guiding device being adjustable between a lowered position, an intermediate lifting position above the lowered position and a upper lifting position above the intermediate lifting position; and a control unit operatively connected to the wind deflector, the roof arrangement and the rear air-guiding device for sensing the position of the roof arrangement and for controlling adjustments of the wind deflector and the air-guiding device, wherein the control unit causes the following steps to be carried out for operating the motor vehicle: sensing an actual driving speed of the motor vehicle, sensing the position of the roof arrangement, extending the wind deflector into its maximum extended position and simultaneously moving the rear air-guiding device to the intermediate lifting position if the control unit senses that the roof arrangement is open and that the actual driving speed of the motor vehicle lies below a predetermined first driving speed, extending the wind deflector into the intermediate lifting position and simultaneously moving the rear air-guiding device to the upper lifting position if the control unit senses that the roof arrangement is open and that the actual driving speed lies above a predetermined second driving speed that is equal to or greater than the predetermined first driving speed, displacing the rear air-guiding device to the lowered position if the control unit senses that the roof arrangement is not open and that the driving speed is below a predetermined further driving speed moving the rear air-guiding device to its maximum lifting position if the control unit senses that the roof arrangement is not open and that the actual driving speed reaches a predetermined third driving speed.