BAS PLUS

The radar-based brake assist system.

Mercedes-Benz Intelligent Drive

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The Brake Assist system BAS PLUS – part of the optional DISTRONIC PLUS system – can help to prevent a rear-end collision or at least reduce the impact speed should the collision prove unavoidable.

Sensors that monitor the area around the vehicle and recognize potential dangers at lightning speed are at the core of the BAS PLUS assist system, which is available with the optional DISTRONIC PLUS. Two radar systems are available for Brake Assist PLUS.

One long-range sensor is located beneath the radiator grille. It scans the area in the front of the car at a scanning angle of 18 degrees up to a range of 200 m (for models from 2009 on; previously 150 m) and across up to three traffic lanes.
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    BAS PLUS uses the same attentive "eyes" as the DISTRONIC PLUS system, i.e. two radar systems that monitor short, medium and long-range distances ahead of the vehicle. One thing the systems do extremely well is detect objects in front of the vehicle and calculate their distance and relative speed compared with the system’s vehicle.

     

    Should the distance between the vehicle and the detected object decrease to an extent that equates to a potential collision, Brake Assist PLUS will go into action by issuing a visual warning on the instrument cluster display and sounding an alarm via the car speakers. At the same time, the electronics system calculates the braking deceleration required to avert the accident. If the driver hits the brakes hard, BAS PLUS recognizes this and automatically optimizes the braking pressure needed to prevent an impact.

     

    Depending on the car’s speed and its distance from the vehicle in front, BAS PLUS can either implement systematic breaking or, if necessary, increase braking power up to maximum force. BAS PLUS engages only if the driver’s braking reaction is not sufficient to prevent an accident. BAS PLUS shuts off braking support if the driver stops braking or the radar no longer detects an object in front of the car.

     

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