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Home >> Mercedes Benz >> 2012 >> GL350 >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Electrical System - Body - 164 Chassis - 1 Of 8 >> Basic Knowledge >> High beam control, function >> High beam control, function - GF82.10-P-3004GX

High beam control, function - GF82.10-P-3004GX

MODEL 164.1/8 with CODE (615) Bi-xenon headlamp unit with integrated curve illumination up to Model Year 2008 

Fig 1: High Beam Control Communication Diagram
G10118058Courtesy of MERCEDES-BENZ USA

Shown on model 164.1 

High-beams actuation 

The high beams actuation is comprised of the following subfunctions:

High beam 

Function requirement 

Function sequence for high beams 

Pressing the combination switch forward requests the high beams. The steering column module acquires the switch position of the combination switch and transmits "High beams On" to the central gateway control unit via CAN-C.

This then sends over CAN-B the "High beams On" message to the front SAM control unit and the instrument cluster.

The front SAM control unit actuates the following components:

Due to the actuation of the left high beam solenoid and right high beam solenoid the covers, which mask off the lower part of the light beam with low beam, are moved away downwards. This in turn means that the full beam has recourse to the entire light beam.

The instrument cluster actuates the blue high beam indicator lamp and thus visually indicates that the high beam is switched on.

Headlamp flasher 

Function requirements: 

Headlamp flasher function sequence 

Pulling the combination switch back switches on the headlamp flasher. The headlamp flasher remains activated as long as the combination switch is held in the pulled position.

The steering column module acquires the switch position of the combination switch and transmits "High beams On" to the central gateway control unit via CAN-C. This then sends over CAN-B the "High beams On" message to the front SAM control unit and the instrument cluster.

When the low beams are on, the front SAM control unit actuates the following components:

When the low beams are off, the front SAM control unit actuates the following components:

IMPORTANT When the low beams are off, only the halogen high beams are actuated for the headlamp flasher function, as it takes too long to ignite the xenon burners and for full brightness to be achieved.

  Instrument cluster, component description A1 GF54.30-P-6000GZ
  Front SAM control unit, component description N10 GF54.21-P-7010GZ
  Upper control panel control unit, component description N72/1
For code (489) AIRmatic (air suspension with level adjustment and adaptive damping system ADS), without code (430) Offroad package
GF54.21-P-6040GZ
For code (489) AIRmatic (air suspension with level adjustment and adaptive damping system ADS) and code (430) Offroad package without USA ONLY GF54.21-P-6040GZE
For USA ONLY with code (489) AIRmatic (air suspension with level adjustment and adaptive damping system ADS) and code (430) Offroad package GF54.21-P-6040GZU
For model 164.8 with USA ONLY and with code (489) AIRmatic (air suspension without level adjustment and adaptive damping system ADS) GF54.21-P-6040GZA
  Electronic ignition/starter switch control unit (EIS), component description N73 GF80.57-P-6000GZ
  Steering column module component description N80 GF54.21-P-6050GZ
  Central gateway control unit, component description N93 GF54.21-P-4170GZ
  Rotary light switch, component description S1 GF82.10-P-4106GZ 
  Combination switch, component description S4 GF82.30-P-5000GZ