This technology senses emergency braking by detecting the
speed at which the driver presses the brake pedal and immediately applying all
available power boost. Brake Assist can potentially reduce overall stopping
distance by eliminating the delay caused by a common human tendency of not
braking hard enough or soon enough. Of course, in actual driving situations,
braking effectiveness also depends on proper brake system maintenance and tire
and road conditions.

The system developed by Mercedes-Benz to shorten emergency stopping distances takes over if a driver applies the brakes quickly but too gently in a critical situation. The system automatically develops maximum brake boost with split-second speed, so reducing the stopping distance by a significant margin.

Tests provide impressive proof of the effectiveness of Brake Assist: on a dry road, most drivers need up to 73 metres for an emergency stop at 100 km/h, since they apply the brakes too gently. With Brake Assist, the car can be brought to a standstill after just 40 metres, a reduction of 45 per cent.