Active Blind Spot Assist

Detects danger and
combats it by braking.

Mercedes-Benz Intelligent Drive

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This system indicates in the exterior mirror when cars or motorcycles are located in the blind spot and takes evasive action automatically in the event of danger, e.g. during lane changing.


No-one can see what is going on behind their back. This limitation has always been compensated in vehicles by means of rear-view and exterior mirrors. One area nevertheless remains which these mirrors are always unable to cover: the blind spot. Drivers sometimes overlook what is happening in the blind spot. This can quickly become dangerous. Active Blind Spot Assist from Mercedes-Benz helps drivers to monitor areas which are difficult for them to see. It warns the driver of detected dangers and is able to help prevent accidents by specific braking intervention.

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Active Blind Spot Assist
2 short-range radar sensors in the rear bumper, 2 in the front bumper and a long-range radar sensor detect vehicles in the so-called blind spot. This is the area of the road which the driver cannot see with the aid of mirrors. When the system recognises that a car or motorcycle is in the blind spot, a red warning triangle appears in the corresponding exterior mirror. If the driver activates the indicator in this situation, an acoustic signal will additionally alert him to the fact that a steering manoeuvre could be dangerous. If a steering manoeuvre into the danger zone is nevertheless initiated, automatic, specific braking of the wheels on the opposite side of the vehicle can be applied to produce a yaw response (turning around the vehicle's vertical axis), which can serve to move the vehicle out of the danger zone.

More detailed information

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Changes may have been made since these images and films were produced.

The assistance system's warning zone extends approx. 3.5 m to the right/left of the vehicle and 3 m beyond the vehicle.

The warning function also includes vehicles which are moving into the warning zone as a result of lane-changing from the next-but-one lane to the lane alongside the vehicle. Overtaking vehicles are indicated immediately after entering the monitoring zone. Vehicles which have just been overtaken are indicated approx. 1.5 s after entering the zone. This avoids continuous flashing of the indicators when overtaking a line of vehicles and suppresses an acoustic warning when the vehicle moves back into its lane with the indicator on.

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