Actuate Brake Lights, Basic Function - GF82.10-P-1022A

Model All (4xWD) 

Model All (CAR) 

Overview 

This document contains information on:

• General 
• Function requirements 
• Function 
  • Vehicles with trailer hitch 
  • Except Canada version and USA version 
  • Canada version or USA version 

General 

The brake light indicates to the traffic following behind any intention of the driver to decelerate the vehicle. The brake light can be switched on by operating the service brake or by an autonomous application of the brake.

Function requirement 

• Circuit 15 ON

Function 

When the brake pedal is operated, the brake system registers the driver's deceleration request through a brake light switch or a pedal angle sensor on the brake pedal.

In the event of autonomous brake application, the brake light is actuated by the corresponding driver assistance system.

During maximum full-stop braking, the brake lights flash as they are actuated (except Canada version or USA version).

Depending on the network architecture of the vehicle, either the central signal acquisition and actuation module or the rear signal acquisition and actuation module receives the "switch on brake light" request and actuates the brake lights.

Vehicles with trailer hitch 

During trailer operation the brake lights on the trailer are also actuated. Depending on the network architecture of the vehicle, either the signal acquisition and actuation module or the rear signal acquisition and actuation module requests actuation of the brake lights on the trailer. The trailer recognition control unit implements this request.

Except Canada version and USA version 

If the vehicle was decelerated by maximum full-stop braking from a speed of at least 70 km/h to less than 3 km/h, the hazard warning flashers are automatically activated.

Canada version or USA version 

The turn signal light has higher priority than the brake light.

	Function schematics
	Function schematic, actuate brake lights	Model 118, 167, 177, 243, 247, 293 Model 213, 238, 257, 290 as of model year 2021	PE82.10-P-2512-97A
		Model 206, 223, 232, 254, 295, 296, 297	PE82.10-P-2512-97C
		Model 464	PE82.10-P-2512-97D
	Further basic functions
	Actuate turn signal light, basic function		GF82.10-P-1023A
	Trailer recognition control unit, basic function	Model all (4xWD) with code E43 (Socket, 13-pin, 12 V, external at rear) Model all (CAR) with code 550 (Trailer coupling)	GF31.19-P-9890A
	Electronic Stability Program control unit, basic function		GF42.45-P-9890A
	Basic function of signal acquisition and actuation module	Model 118, 177, 243, 247, 464	GF54.21-P-9895A
	Basic function of signal acquisition and actuation module at rear	Model 167, 206, 223, 232, 254, 293, 295, 296, 297 Model 213, 238, 257, 290 as of model year 2021	GF54.21-P-9897A
	Rear lamp unit, basic function		GF82.10-P-2004A
	Additional brake lamp, basic function		GF82.10-P-2019A