Prevention
Adaptive Highbeam Assist – the Intelligent Headlamp
Adaptive Highbeam Assist from Mercedes-Benz makes night-time driving even safer. The system adjusts the headlamp range automatically to the distance of oncoming traffic or vehicles in front with their lights on. This provides the driver with the ideal headlamp range at all times, enabling better and earlier recognition of the course of the road, pedestrians or other dangers.
Adaptive Highbeam Assist
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Adaptive Highbeam Assist
When the camera-based Adaptive Highbeam Assist Plus system detects oncoming traffic or vehicles ahead, it adapts the highbeam light distribution according to the prevailing traffic situation.  
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When the camera-based Adaptive Highbeam Assist Plus system detects oncoming traffic or vehicles ahead, it adapts the highbeam light distribution according to the prevailing traffic situation.
The Adaptive Highbeam Assist of Mercedes-Benz is based on a camera on the inside of the front windscreen which monitors the traffic situation in front of the car. An intelligent image processing algorithm enables the camera to identify other vehicles and to calculate their distances. The range of the variably adjustable headlamps is set accordingly and adjusted continuously according to the distance of the vehicle ahead or oncoming traffic.
The system is extremely fast, relaying fresh data to the headlamps every 40 milliseconds. On the basis of this information, the headlamps are switched to low beam and the range of the adjustable bi-xenon headlamps in dipped-beam mode is set within a maximum reach of 300 metres and continuously adapted to the prevailing traffic situation. When the system detects that the road ahead is clear, high beam is activated automatically. Adaptive Highbeam Assist in Mercedes-Benz cars is available at speeds of 55 km/h and over. Once it has been switched on it operates fully automatically.
The enhanced functionality of the Adaptive Highbeam Assist Plus
The Adaptive Highbeam Assist Plus, which is available in the new Mercedes-Benz S- and E-Class starting with 2013, is based on a stereo camera:
If its image recognition algorithm picks up a vehicle that is oncoming or driving ahead, it actuates a mechanism in the headlamp module. This module masks the portion of the LED headlamps' cone of light where there are other vehicles to prevent their drivers being dazzled. Consequently, the main-beam headlamps can be turned on at all times without irritating or even endangering other road users.
Adaptive Highbeam Assist PLUS. Dazzle-free permanent high beam.  
Adaptive Highbeam Assist PLUS. Dazzle-free permanent high beam.
If road users are detected outside the area that can be masked – for instance when cornering with multiple vehicles in the headlamps' beams – the system will switch to the familiar system of headlamp range control using the low-beam headlamps. The Adaptive Highbeam Assist Plus is active at speeds above 30 km/h when travelling on roads without street lighting in the dark and therefore avoids manual start-up and switch-off processes. Besides that, possible backglare caused by increased use of the main beam and highly reflective signs at the side of the road is also detected and eliminated by dimming the headlamps accordingly.
Highbeam Assist in Mercedes-Benz Vans
When the camera detects two-track vehicles or motorcycles travelling towards or ahead of the driver's vehicle, high beam is automatically dipped to low beam.  
When the camera detects two-track vehicles or motorcycles travelling towards or ahead of the driver's vehicle, high beam is automatically dipped to low beam.
The Highbeam Assist feature is a first in the Sprinter's class. It guarantees optimum illumination of the road by switching high beam on or off according to the given situation. The course of the road, pedestrians or dangerous spots are now recognisable even earlier and more reliably. At the same time, Highbeam Assist also reduces the possibility of oncoming traffic or vehicles ahead being dazzled.
The system in Mercedes-Benz vans is also based on a camera on the inside of the front windscreen which observes the traffic situation in front of the vehicle. When the camera detects two-track vehicles or motorcycles travelling towards or ahead of the driver's vehicle, high beam is automatically dipped to low beam. Highbeam Assist is able to distinguish between moving and stationary objects. When the road is clear once again, the assistance system switches back to high beam. The camera system also responds to road lighting by deactivating high beam automatically – when passing through built-up areas, for example.
Highbeam Assist operates at vehicle speeds above 35 km/h. It will be available for both halogen and bi-xenon headlamps.
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