Evasive Maneuver Support, Basic Function - GF54.71-P-9902A
Model all (CAR)
with code 233 (Adaptive cruise control Plus (DISTRONIC PLUS))
Model all (CAR)
with code 266 (Active Steering Assist)
Overview
This document contains information on:
- General
- Function requirements
- Function
General
Evasive steering support can help the driver if he wants to swerve around, e.g. a pedestrian in a hazardous situation.
If the driver initiates an evasive maneuver by means of a steering movement, the system supports this evasive steering request by specifying the electric power steering with additional, precisely calculated steering torque. This helps the driver avoid the pedestrian in a controlled manner, and afterward makes it easier to put the vehicle back on a straight course, possibly with additional support from the Electronic Stability Program (ESP®).
Collisions with pedestrians can thus be avoided or the severity of injury can at least be reduced.
Support is always driver-initiated; the evasion direction is specified by the driver. The driver can therefore either go with the system activity or override the system.
Evasive steering support is operated together with the Active Brake Assist via the multimedia system.
Function requirements
- Engine in operation or drivetrain operational
- ESP® not switched passively
- No ESP® control intervention (only vehicles up to market launch of model 223)
- Drive range "D" engaged
- Straight-ahead driving
- No trailer operation (vehicles with trailer hitch)
Function
To assess the traffic situation ahead of the vehicle, evasive steering support evaluates the information from the front radar sensor and the information from the multifunction camera behind the windshield. The evasive steering support function additionally evaluates the following function-relevant parameters:
- Vehicle speed/direction of travel
- ESP® status
- Electric power steering, status
- Steering wheel angle
- Wheel angle
- Steering wheel torque (only vehicles up to market launch of model 223)
- Tire pressure monitoring system status
- Trailer recognition (vehicles with trailer hitch)
If the system detects a pedestrian and the driver starts an evasive maneuver, the system supports this action.
Evasive steering support is active in a vehicle speed range from approx. 20 to approx. 70 km/h (approx. 20 to approx. 110 km/h from market launch of model 223). If the road space monitoring function detects further obstacles in the danger zone, the system does not support the evasive steering request from the driver up to the market launch of model 223. A warning tone sounds when support begins.
The system calculates the additional steering torque, which is implemented by the electric steering in the evasion direction. If physical driving limits are reached as a result of the evasive maneuver, the ESP® also intervenes.
Functional restrictions of evasive steering support
The evasive steering support function cannot always clearly recognize objects and complex traffic situations. Furthermore, the support function will in some cases not be sufficient to avoid a collision.
In these cases, the evasive steering support can:
- issue a warning or provide support without reason
- fail to issue a warning or provide support
| Function schematics | |||
| Assist evasive maneuver, function schematic | 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-2503-97A | |
| Model 223, 297 with code 233 (Adaptive cruise control Plus (DISTRONIC PLUS)) | PE54.71-P-2503-97B | ||
| Model 206, 232, 295 with code 233 (Adaptive cruise control Plus (DISTRONIC PLUS)) | PE54.71-P-2503-97C | ||
| Additional basic functions | |||
| Brakes, basic function | GF42.00-P-9900A | ||
| Traffic area monitoring, basic function | GF54.71-P-1000A | ||
| Intelligent driving control unit, basic function | Model all (CAR) with code 233 (Adaptive cruise control Plus (DISTRONIC PLUS)) | GF30.30-P-9890A | |
| Electronic Stability Program control unit, basic function | GF42.45-P-9890A | ||
| Electric power steering control unit, basic function | GF46.35-P-9890A | ||
| Front multifunction camera, basic function | Model all (CAR) with code 233 (Adaptive cruise control Plus (DISTRONIC PLUS)) | GF54.71-P-9890A | |
| Intelligent driving radar sensor, basic function | Model all (CAR) with code 233 (Adaptive cruise control Plus (DISTRONIC PLUS)) | GF54.71-P-2005A |