General
If an accident happens, the Supplemental Restraint System (SRS) launches various functions that, e.g. warn other road users, reduce the fire hazard or make it easier to rescue vehicle occupants.
Function requirement
Circuit 15R ON
Additional functions
Functions that may be triggered in the event of an accident are listed in the following table:
Function | Aim |
Switch on hazard warning system. | Warn other road users. |
Switch on interior illumination. | Make orientation in the vehicle easier for vehicle occupants or persons rendering assistance. |
Switch on ambient lighting (vehicles with ambient lighting). | Alert persons in the area about the given situation. |
Open central locking. | Enable access to vehicle occupants, auxiliary material and the QR code on the fuel filler flap. |
Open side window. | To extract any smoke particles generated by the restraint equipment. |
Switch off engine (depending on type of accident and impact severity). | Reduce fire hazard. |
Shutoff air conditioning system. | Prevent any ingress of noxious gases, reduce fire hazard. |
Trigger pyrofuse (hybrid vehicles, electric vehicles or vehicles with 48 V technology). | Reduce fire hazard. |
Switch off high-voltage components (hybrid vehicles, electric vehicles). | Reduce fire hazard. |
Switch off 48 V components (vehicles with 48 V technology). | Reduce fire hazard. |
Switch off stationary heater (vehicles with stationary heater). | Reduce fire hazard. |
Automatic emergency call (vehicles with RAMSES or HERMES communications module) | Notify rescue services as quickly as possible. |
Crash-active easy exit feature (vehicles with seat adjustment with memory function) | Make it easier for driver to exit the vehicle or for first aiders to retrieve driver from the vehicle. |
Function schematics | |||
Function schematic, trigger additional functions after accident | Model 118, 177, 247Model 167Model 293 | ||
Model 213, 238, 257, 290 as of model year 2021 | |||
Further basic functions | |||
Steering column adjustment, basic function | |||
Fuel supply, basic function | |||
Actuate window lifter, basic function | |||
Central locking system, basic function | |||
Actuate turn signal light, basic function | |||
Interior lighting, basic function | |||
Ambient lighting, basic function | Model all (CAR) | ||
Emergency call system, basic function | Model all (CAR) | ||
Climate control, basic function | |||
Stationary heater, basic function | Model all (CAR) | ||
Control units | |||
Supplemental restraint system control unit, basic function |