Blind Spot Assist uses two lateral, rear-facing radar sensors to monitor the area up to 40 m behind 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 the side of your vehicle, the red warning lamp in the outside mirror flashes. If you switch on the turn signal indicator in the corresponding direction, a warning tone sounds once. If the turn signal indicator remains switched 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.
Blind Spot Assist cannot warn drivers in this situation.
Blind Spot Assist is only an aid. It may fail to detect some vehicles and is not a substitute for attentive driving. Always ensure that there is sufficient distance to the side for other road users and obstacles.
if there is dirt on the sensors or the sensors are obscured
in poor visibility, e.g. due to fog, heavy rain or snow
if there are narrow vehicles, e.g. bicycles or motorbikes
if the road has very wide or narrow lanes
if vehicles are not driving in the middle of their lane
Warnings may be issued in error when driving close to crash barriers or similar continuous lane borders. Always make sure that there is sufficient distance to the side for other traffic or obstacles.
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.
Blind Spot Assist is not operational when a trailer is coupled to the vehicle and the electrical connection has been correctly established.
You can watch an animation on this topic at the following link: