Audi A4 Controls Driving Electro-mechanical parking brake
Please note the following points to prevent the Audi A4 from rolling back unintentionally on a gradient.
Pull and hold the switch -A- Fig. 1 and press the accelerator. The parking brake will remain engaged and prevent any tendency to roll back down the slope.
You can release the switch -A- as soon as the engine is delivering enough power to the wheels.
Depending on the weight of the Audi A4 and trailer and the steepness of the slope, there may be a tendency to roll back downhill when driving away from a standstill.