Headlamp range control, basic function

GF82.10-P-1016A

04.06.2020

Model

all (CAR)

Overview

This document contains the following information:

 General

 Function requirement

 Headlamp range control

General

Headlamp range control is installed as an item of passive safety equipment to protect other road users from glare. It enables the headlamp range to be adjusted to match the vehicle's load condition. Headlamp range control is realized using actuator motors located in the front lamp units.

 On vehicles with air suspension, the vehicle level and therefore the headlamp range are automatically adapted to the vehicle load condition.

Function requirement

 Low beams/high beams ON

Headlamp range control

Manual headlamp range control (halogen headlamps) is operated using the headlamp range adjuster.

The automatic headlamp range control (LED headlamps) is regulated to match the vehicle level. Level sensors on the wheel suspensions record the vehicle level.

To adjust the incline angle of the headlamp units, actuator motors in the front lamp units are actuated.

At a constant vehicle speed the automatic headlamp range control operates in static mode with a low adjustment speed. When the vehicle is accelerated, the dynamic mode is activated and the reaction time of the automatic headlamp range control is significantly reduced. Dynamic mode is activated depending on the speed change and additional signals such as the brake pedal and accelerator pedal position.

 When the vehicle is stationary, automatic headlamp range control is carried out in dynamic mode.

Function schematics
Function schematic, adjust headlamp range	Model 118, 167, 177, 247, 293Model 213, 238, 257, 290 as of model year 2021	PE82.10-P-2508-97A
Control units
Basic function of signal acquisition and actuation module	Model 118, 177, 247	GF54.21-P-9895A
Basic function of signal acquisition and actuation module at front	Model 167, 293 Model 213, 238, 257, 290 as of model year 2021	GF54.21-P-9896A
Headlamp control unit, basic function	Model all (CAR) with code 631 (Static LED headlamps, left-hand traffic) Model all (CAR) with code 632 (Headlamps, LED, static, right-side traffic) Model all (CAR) with code 640 (SAE dynamic LED headlamps, right-hand traffic) Model all (CAR) with code 641 (Dynamic LED headlamps, left-hand traffic) Model all (CAR) with code 642 (Dynamic LED headlamps, right-hand traffic)	GF82.10-P-9890A
Components
Level sensor, basic function	Model all (CAR) with code 459 (Steel suspension with adjustable damping) Model all (CAR) with code 489 (AIRMATIC) Model all (CAR) with code 490 (Electrohydraulic suspension) Model all (CAR) with code 613 (headlights left-hand-traffic) Model all (CAR) with code 620 (Right-hand traffic headlamps) Model all (CAR) with code 631 (Static LED headlamps, left-hand traffic) Model all (CAR) with code 632 (Headlamps, LED, static, right-side traffic) except code 460 (Canada version) except code 494 (US version) Model all (CAR) with code 640 (SAE dynamic LED headlamps, right-hand traffic) Model all (CAR) with code 641 (Dynamic LED headlamps, left-hand traffic) Model all (CAR) with code 642 (Dynamic LED headlamps, right-hand traffic)	GF32.31-P-2001A
Front lamp unit, basic function		GF82.10-P-2000A
Exterior lights switch, basic function		GF82.10-P-2022A

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