Traffic Area Monitoring, Basic Function - GF54.71-P-1000A

Model All (4xWD) 

Model All (CAR) 

Overview 

This document contains information on:

• General 
• Function requirements 
• Function 
  • Approaching vehicle in the oncoming lane 
  • Slow vehicle in the parallel lane being overtaken 
  • Overtaking vehicle in the parallel lane 
  • Vehicle in the parallel lane (at approximately the same level) 
  • Guardrails or a series of stationary vehicles behind the lane markings 
  • Swinging-in vehicles (as of market launch of model 167) 

General 

Actively intervening driver assistance systems evaluate the traffic situation in front of, beside and behind the vehicle in order to define the amount of free space for possible system reactions.

Function requirements 

• Engine running or drivetrain operational
• Radar sensor soiling and function test completed
• Multifunction camera soiling and function test completed (depending on equipment installed)

Courtesy of MERCEDES-BENZ USA

Example illustration of detection range of traffic area monitoring 

Function 

The area in front of, beside and behind the vehicle is sensed and evaluated by various radar sensors or by the multifunction camera, depending on the vehicle equipment installed.

The radar sensors can register both the close range around the vehicle to the front, rear and sides, as well as the long range to the front and rear, depending on type.

The multifunction camera can, depending on the version, derive the following information from detected objects according to a movement profile:

• The detected object is a pedestrian.
• The detected object is a cyclist.
• The detected object is a vehicle.
• The direction of movement of the detected object is perpendicular to the direction of travel.

The information of the radar sensors or the multifunction camera is used to avoid collisions with objects in the vehicle's lane or in the event of lane changes as much as possible. The driver assistance system decides whether system reactions are necessary depending on the closing speed and the relative positions in the lane.

The following situations can lead to a system reaction, for example, when changing to the parallel/oncoming lane:

• Approaching vehicle in the oncoming lane 

  Vehicles in the oncoming lane are detected by the front radar sensor and by the multifunction camera.

• Slow vehicle in the parallel lane being overtaken 

  Vehicles in the right or left parallel lane in front of the vehicle are detected by the front radar sensor and by the multifunction camera.

• Overtaking vehicle in the parallel lane 

  Vehicles approaching from behind at a high speed differential relative to the vehicle are detected by the rear radar sensors.

• Vehicle in the parallel lane (at approximately the same level) 

  Vehicles in the right or left parallel lane and level with the vehicle are detected by the rear radar sensors.

• Guardrails or a series of stationary vehicles behind the lane markings 

  Objects behind the lane markings are detected by the front radar sensor and by the multifunction camera.

• Swinging-in vehicles (as of market launch of model 167) 

  Vehicles that swing-in sharply from the right or left parallel-running lane are detected by the radar sensors at front left and right.

	Function schematics
	Monitor traffic situation, function schematic	Model 465	PE54.71-P-2500-97K
		Model 118, 167, 177, 243, 247, 293 with code 234 (Blind Spot Assist) except code 233 (Adaptive cruise control Plus (DISTRONIC PLUS)) except code 51B (Rating, country group EURO-NCAP) Model 118, 167, 177, 243, 247, 293 with code 243 (Active Lane Keeping Assist (camera)) except code 233 (Adaptive cruise control Plus (DISTRONIC PLUS)) except code 51B (Rating, country group EURO-NCAP) Model 213, 238, 257, 290 as of model year 2021 with code 234 (Blind Spot Assist) except code 233 (Adaptive cruise control Plus (DISTRONIC PLUS)) except code 51B (Rating, country group EURO-NCAP) Model 213, 238, 257, 290 as of model year 2021 with code 243 (Active Lane Keeping Assist (camera)) except code 233 (Adaptive cruise control Plus (DISTRONIC PLUS)) except code 51B (Rating, country group EURO-NCAP)	PE54.71-P-2500-97A
		Model 118, 167, 177, 243, 247, 293 with code 234 (Blind Spot Assist) with code 51B (Rating, country group EURO-NCAP) except code 233 (Adaptive cruise control Plus (DISTRONIC PLUS)) Model 118, 167, 177, 243, 247, 293 with code 243 (Active Lane Keeping Assist (camera)) with code 51B (Rating, country group EURO-NCAP) except code 233 (Adaptive cruise control Plus (DISTRONIC PLUS)) except code 234 (Blind Spot Assist) Model 213, 238, 257, 290 as of model year 2021 with code 234 (Blind Spot Assist) with code 51B (Rating, country group EURO-NCAP) except code 233 (Adaptive cruise control Plus (DISTRONIC PLUS)) Model 213, 238, 257, 290 as of model year 2021 with code 243 (Active Lane Keeping Assist (camera)) with code 51B (Rating, country group EURO-NCAP) except code 233 (Adaptive cruise control Plus (DISTRONIC PLUS)) except code 234 (Blind Spot Assist)	PE54.71-P-2500-97B
		Model 118, 167, 177, 243, 247, 293 with code 233 (Adaptive cruise control Plus (DISTRONIC PLUS)) Model 213, 238, 257, 290 as of model year 2021 with code 233 (Adaptive cruise control Plus (DISTRONIC PLUS))	PE54.71-P-2500-97C
		Model 192, 206, 214, 223, 232, 236, 254, 294, 295, 296, 297 with code 233 (Adaptive cruise control Plus (DISTRONIC PLUS))	PE54.71-P-2500-97E
	Detailed information
	Functional limitations of traffic area monitoring, detailed information		GF54.71-P-1100-01A