Headlamp range adjustment (HRA) headlamp function - GF82.10-P-1001T

MODEL 211.0/2 up to 31.5.06 except CODE (614) Bi-xenon headlamp unit except CODE (615) Bi-xenon headlamp unit with integrated curve illumination except CODE (494) USA version except CODE (498) Japan version

MODEL 211.0/2 up to 30.6.06 except CODE (614) Bi-xenon headlamp unit except CODE (615) Bi-xenon headlamp unit with integrated curve illumination with CODE (494) USA version with CODE (498) Japan version

Location of components, shown on model 211.0

Fig 1: Locating Headlamp Range Adjustment (HRA) Components - Shown On Model 211.0

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Headlamp range control is installed as passive safety equipment to prevent halogen headlamps dazzling oncoming traffic.

The headlamp range adjustment serves to keep the incline angle of the driving lights dependent on the given load and the position of the HRA [LWR] selector wheel (S1s8) within the legally prescribed limits.

Function requirements:

Circ. 15 ON

Function

On model 211.0 the HRA [LWR] selector wheel (S1s8) features positions 0, 1, 2, and 3.

On model 211.2 the HRA [LWR] selector wheel (S1s8) features positions -1, 0, and 1.

The individual selector wheel positions are to be matched to the vehicle loads and they are available in the operator's manual.

Actuation takes place directly from the HRA [LWR] selector wheel (S1s8) via the driver-side SAM control unit with fuse and relay module (N10/1) to the left headlamp range adjustment motor (E1m1) in the left front lamp unit (E1) and the right headlamp range adjustment motor (E2m1) in the right front lamp unit (E2).

Driver-side SAM control unit with fuse and relay module, location/task/design	GF54.21-P-4109T
Headlamp leveling system motor, location/task/design/function	GF82.10-P-2101T
Rotary light switch module, location/task/design	GF82.10-P-4104T