Adjusting the speed – The view of the radar sensor is impaired by add-on parts, number plate holders with trim frames or stickers. Keep the area around the radar sensor free. You can adjust the stored speed within the de- fined speed range by means of the buttons on the multifunction steering wheel: +1 km/h -1 km/h +10 km/h -10 km/h – The radar sensor has been displaced or dam- aged, for example, due to damage to the front end of the vehicle. Check whether damage is visible → page 210. – Fault or malfunction. Switch off and restart the engine. Press and hold the corresponding button to con- tinuously change the stored speed.
– Paint work or structural modifications were carried out on the front of the vehicle. WARNING – The genuine Volkswagen radiator grille is not used. If you do not maintain the minimum distance to the vehicle in front or if the difference in speed between the vehicle in front and your own vehicle is so great that the braking action of ACC is insufficient, you are in danger of col- liding with the vehicle in front. In rainy days and winter road conditions, the braking dis- tance will be extended. – If the fault persists, go to a correspondingly qualified workshop. Volkswagen recommends using a Volkswagen dealership. The ACC does not function as expected – The radar sensor is dirty.
Clean the radar sen- sor → page 204. ● ACC cannot detect all driving situations cor- rectly. – The system limits have been exceeded → page 114. ● Always be prepared to brake the vehicle yourself. – The brakes have overheated, control was can- celled automatically. Allow the brakes to cool down and check their functionality again. ● Press the accelerator to override Adaptive Cruise Control. ACC does not brake automati- cally in this case. – If the vehicle in front suddenly brakes in an emergency, the ACC may not respond. In this case, the driver should brake accordingly and take control of the vehicle. ● Observe any country-specific regulations for the minimum distance.
● Always set a larger distance in wet or snowy conditions or when visibility is poor. – If the fault persists, go to a correspondingly qualified workshop. Volkswagen recommends using a Volkswagen dealership. Troubleshooting Control cannot be started Make sure that the following conditions are met: – The selector lever is in position D/S or the Tip- tronic gate. Please refer to at the start of the chapter on page 113. ACC not available The indicator lamp lights up. – The brake lights on the vehicle are working. – ESC is not performing a control intervention. – The brake pedal is not depressed. – The radar sensor is dirty. Clean the radar sen- sor → page 204.
Unusual noises during automatic braking – This is normal and is not a fault. – The view of the radar sensor is impaired due to the weather conditions, e.g. snow, or due to detergent deposits or coatings. Clean the radar sensor → page 204. Adjusting and calibrating the ACC The ACC must be adjusted and calibrated in the following situations: 182.5C1.TRO.74 Driver assist systems 117