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Drive Assist systems, function - GF54.00-P-0002RF

Model 205, 253 

Driver assistance systems, general 

The driver assistance systems support the driver in various situations either actively or passively depending on the configuration of the systems. In both cases, the driver assistance systems contribute to driving safety. This helps to reduce the frequency of accidents and their consequences. Ride comfort is also enhanced.

The following driver assistance systems are available and are described in separate documents:

Attention assistance system 

By evaluating steering patterns any onset of driver fatigue (e.g. on long monotonous journeys on freeways and highways) can be detected. If the evaluation indicates fatigue or an increasing lack of attention by the driver, the driver is prompted to take a break by means of visual and acoustic warnings.

Cruise control 

The cruise control constantly adjusts the actual speed of the vehicle without operation of the accelerator pedal to the target speed set by the driver. The vehicle is also automatically braked through active intervention by the brake system when driving down a hill to maintain the target speed.

IMPORTANT The driving assistance systems specified below are based on camera or radar technology. People and objects such as, e.g. vehicles and obstacles or traffic signs are registered on the basis of camera or radar technology. Depending on the particular requirements called for, each of the driving assistance systems uses the detection ranges of the radar sensors or the multifunction cameras shown as a diagram in the following graphic.

Fig 1: Overview Of Drive Assist Systems
G10133609Courtesy of MERCEDES-BENZ USA

Lane Keeping Assist (with CODE 476 (Lane Keeping Assist)) 

The Lane Keeping Assist detects any unintentional driving across lane markings and issues a haptic warning to the driver in certain situations by initiating vibrations on the steering wheel.

The Lane Keeping Assist evaluates detection range "B".

COLLISION PREVENTION ASSIST PLUS (with CODE 258 (COLLISION PREVENTION ASSIST)) 

The COLLISION PREVENTION ASSIST PLUS continuously checks the distance to the vehicle in front, warns the driver visually and acoustically of potential collisions (e.g. rear-end collision) with other vehicles, thereby helping to reduce the risk of accident considerably. In an imminent collision situation, the COLLISION PREVENTION ASSIST PLUS initiates autonomous partial braking.

COLLISION PREVENTION ASSIST PLUS evaluates detection range "A".

DISTRONIC PLUS (with CODE 239 (DISTRONIC PLUS)) 

The DISTRONIC PLUS regulates the speed and distance relative to the vehicle in front in a vehicle speed range of v = 0 to 200 km/h and v = 200 to 0 km/h automatically according to the driver's request.

DISTRONIC PLUS evaluates detection range "A".

DISTRONIC PLUS with Steer Assist and Stop & Go Pilot (with CODE 266 (DISTRONIC PLUS with Steer Assist and Stop & Go Pilot)) 

The DISTRONIC PLUS automatically controls the speed and the distance to a vehicle driving ahead in accordance with the driver's request by braking when necessary and accelerating again if possible. Distance and speed control is performed by the radar sensors control unit. In order to do this, the radar sensors control unit actively intervenes in the engine management or the brake system.

If heavier braking is required than the DISTRONIC PLUS can apply, the driver is visually and acoustically warned.

The Steer Assist assists the driver by keeping the vehicle in the center of the lane, even in gentle bends. The vehicle stays in its lane, and unintentional movement towards the lane markings is prevented. Steer Assist does not relieve the driver of his/her task of keeping the vehicle in the lane. It serves more to relieve the load and therefore to facilitate the resulting increase in comfort. Assistance is also only provided within defined limits, i.e. no assistance can be provided for large steering angles at slow speeds, e.g. caused by driving on roads going over passes.

DISTRONIC PLUS with Steer Assist and Stop & Go Pilot evaluates detection ranges "A", "B" and "C".

Blind Spot Assist (with CODE 234 (Blind Spot Assist)) 

The Blind Spot Assist monitors the rear and side areas of the vehicle using short range radar and, if necessary, informs the driver that an intentional lane change (turn signal active) is not recommended at this time. In a broader sense, the Blind Spot Assist acts as an extension of the outside mirrors and inside rear-view mirror.

Blind Spot Assist evaluates detection range "D".

Active Blind Spot Assist (with CODE 237 (Active Blind Spot Assist)) 

The Active Blind Spot Assist monitors the rear and side areas of the vehicle using short range radar and, if necessary, informs the driver that an intentional lane change (turn signal active) is not recommended at this time. In a broader sense, Active Blind Spot Assist acts as an extension of the outside mirrors and inside rear-view mirror.

If the active Blind Spot Assist system detects the threat of an imminent side collision with a vehicle during a lane change, a course-correcting intervention by the brake system is requested. This is conducted through targeted wheel-specific interventions by the brake system, to move the vehicle back onto a collision-free course.

Active Blind Spot Assist evaluates the detection ranges "A", "C" and "D".

Active Lane Keeping Assist (with CODE 238 (Active Lane Keeping Assist)) 

The Active Lane Keeping Assist detects when lane markings are unintentionally crossed over and warns the driver in certain situations by means of a warning system in the steering wheel before the lane is exited. If the driver fails to react to the warning, specific interventions by the brake system are initiated in order to return the vehicle to the lane.

The Active Lane Keeping Assist evaluates detection ranges "A", "B", "C", "D" and "E".

BAS PLUS (with CODE 268 (Brake Assist System PLUS) or with CODE 269 (Brake Assist System PLUS intersecting traffic (BAS+Q))) 

BAS PLUS supports the driver during a critical braking situation. The brake boost required for this is calculated according to the situation. In this way a threatened collision can be prevented or, at least, the consequences of the collision are mitigated.

BAS PLUS evaluates the detection ranges "A", "B" and "C".

PRE-SAFE® brake (with CODE 300 (PRE-SAFE® brake) or with CODE 271 (Autonomous intervention by the brake system/pedestrian protection)) 

The PRE-SAFE® brake assesses the traffic situation in front of the vehicle and it continuously determines the hazard potential for a rear-end collision. In critical accident situations PRE-SAFE® brake introduces appropriate measures geared towards avoiding a collision or - at the least - reducing the possible consequences of a collision. Furthermore, there is a distance warning function contained therein which advises the driver about a vehicle driving immediately ahead which is too close. An optical and acoustic warning is issued before any possible collisions with vehicles or stationary obstacles on the vehicle's own lane.

PRE-SAFE® brake evaluates the detection ranges "A", "B" and "C".

Rear-end PRE-SAFE® (with CODE 253 (Rear collision warning and protection system)) 

PRE-SAFE® rear end extends the preventive occupant protection system for the stationary vehicle in the event of an imminent rear end collision. To this end, the traffic situation at the rear is monitored. Various measures are introduced on this basis that may be able to reduce the consequences of an accident for the passengers.

PRE-SAFE® rear end evaluates the detection range "E".

Traffic Sign Assist (with CODE 513 (Traffic Sign Assist)) 

Traffic Sign Assist detects the traffic signs on the route being traveled by the vehicle. It notifies the driver of signposted speed limits and prohibitions or their termination, while also warning visually and acoustically when entering a freeway or a expressway opposite the specified direction of travel (wrong-way driver scenario).

The following traffic signs are registered and evaluated:

  Attention assist, function   GF54.30-P-0009RF 
  Cruise control (CC), function   GF30.30-P-0001RF
  Lane Keeping Assist, function Model 205, 253 with code 476 (Lane keeping assist) GF54.71-P-0005RF
  COLLISION PREVENTION ASSIST PLUS, function Model 205, 253
with code 258 (COLLISION PREVENTION ASSIST)		 GF30.30-P-0018RF
  DISTRONIC PLUS, function Model 205, 253
with code 239 (DISTRONIC PLUS)		 GF30.30-P-3300RF
  DISTRONIC PLUS with Steer Assist and stop & go pilot function Model 205, 253
with code 266 (DISTRONIC PLUS with Steer Assist and Stop & Go Pilot)		 GF30.30-P-0017RF
  Blind Spot Assist, function Model 205, 253
with code 234 (Blind Spot Monitoring)		 GF54.71-P-0003RF
  Active Blind Spot Assist, function Model 205, 253
with code 237 (Active Blind Spot Assist)		 GF54.71-P-0006RF
  Active Lane Keeping Assist, function Model 205, 253
with code 238 (Active lane keeping Assist)		 GF54.71-P-0004RF
  BAS PLUS, function Model 205, 253
with code 268 (Brake Assist System Plus)
Model 205, 253
with code 269 (Brake Assist PLUS with Cross-Traffic Assist (BAS+Q)		 GF30.30-P-3310RF
  PRE-SAFE brake, function Model 205, 253
with code 271 (Autonomous brake intervention/pedestrian protection)
Model 205, 253
with code 300 (PRE-SAFE® Brake)		 GF30.30-P-3340RF
  PRE-SAFE rear, function Model 205, 253
with code 253 (Rear impact warning and protection system)		 GF30.30-P-0015RF
  Traffic Sign Assist, function Model 205, 253
with code 513 (Speed Limit Assist)		 GF54.30-P-0010RF 
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