2016 Audi A3 Cabriolet — Owner's Manual
Vehicles left behind. If you slow ly pass a vehicle that side assist has detected (the difference in speed between the vehicle and your vehicle is less than 9 mph or 15 km/h), the display in the exterior mirror turns on as soon as the vehicle enters your blind spot. The display will not turn on if you quickly pass a vehicle that side assist has detected (the difference in speed between the vehicle and your vehicle is greater than 9 mph or 15 km/h). Functional limitations.
The radar sensors are designed to detect the left and right adjacent lanes when the road lanes are the normal width. In some situations, the display in the exterior mirror may turn on even though there is no vehicle located in the area that is criti· cal for a lane change. Do not cover the radar sensors with stickers, deposits, bicycle wheels or other objects, because this will affect the function. Do not use side assist when towing a trailer.
For information on cleaning, refer to page 224.