Adjusting the stationary rear wing
Requirements:
There is a socket wrench available for the rear wing's bolts.
The double rear wing improves the rear axle output and, therefore, the vehicle's driving stability. You can move the two wings into two more inclined positions and into one flat position.
When you move the rear wing into the more inclined position, the rear axle output and the air resistance increase.
Unscrew the bolts 
for the wing in question with a socket wrench.
for the wing in question with a socket wrench. Tilt the wing in question into one of the two positions, upwards or downwards into a flat position.
Tighten the bolts of the adjusted wing.
of the adjusted wing. Specified tightening torque:10 Nm.