Blind Spot Assist uses two lateral, rear-facing radar sensors to monitor the area up to 40 m behind your vehicle and 3 m directly next to your vehicle.
If a vehicle is detected at speeds above approximately 12 km/h and this vehicle subsequently enters the monitoring range directly next to your vehicle, the warning lamp in the outside mirror lights up red.
If a vehicle is detected close to your vehicle in the lateral monitoring range and you switch on the turn signal indicator in the corresponding direction, a warning tone sounds once. The red warning lamp in the outside mirror flashes. If the turn signal indicator remains on, all other detected vehicles are indicated only by the flashing of the red warning lamp.
If you overtake a vehicle quickly, no warning is given.
Blind Spot Assist does not react to vehicles approaching and overtaking you at a greatly different speed.
As a result, Blind Spot Assist cannot warn drivers in this situation.
Blind Spot Assist and Active Blind Spot Assist are only aids. They may fail to detect some vehicles and are no substitute for attentive driving. Always ensure that there is sufficient distance to the side for other road users and obstacles.
If the sensors are dirty or covered.
When there is poor visibility, e.g. due to fog, heavy rain, snow or spray.
If narrow vehicles are within the monitoring range, e.g. bicycles.
Warnings may be issued in error when driving close to crash barriers or similar solid lane borders. Warnings may be interrupted when driving alongside long vehicles, for example lorries, for a prolonged time.
Blind Spot Assist is not operational when reverse gear is engaged.