The lane change assistant, Audi side assist (also available separately), supports the driver when changing lanes at a speed of above 15 km / h, using two rear radar sensors which are able to measure approximately 70 metres.
If another vehicle is moving in the blind spot or approaching rapidly, a warning LED will light up in the casing of the relevant exterior mirror. If the driver nevertheless activates the turn signal, the LED will flash several times in quick succession.
The Audi side assist is connected to the system Audi pre sense rear, which initiates protective measures to prevent an imminent rear-end collision. The Audi pre sense rear is also active in the background when using Audi side assist, with the exception of the trailer operation.