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Home >> Mercedes Benz >> 2017 >> GLS450 >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Electrical System - Body - 166 Chassis 4 Of 8 >> Testing & Repair >> Remove/Install Headlamp Actuation Module - AR82.10-P-4650GQC

Remove/Install Headlamp Actuation Module - AR82.10-P-4650GQC

Model 166 as of model year 2016 with code 640 (High-performance LED) 

Model 166 as of model year 2016 with code 641 (Headlamps, LED, dynamic, left-side traffic) 

Model 166 as of model year 2016 with code 642 (Headlamps, LED, dynamic, right-side traffic) 

Model 292 with code 640 (High-performance LED) 

Model 292 with code 641 (Headlamps, LED, dynamic, left-side traffic) 

Model 292 with code 642 (Headlamps, LED, dynamic, right-side traffic) 

Fig 1: Left Front Headlamp Unit LED Module Components Location - Model 166 As Of Model Year 2016 With Code 640, 641, 642 (Shown On Model 292)
G14136990Courtesy of MERCEDES-BENZ USA

Shown on model 292 

Fig 2: Right Front Headlamp Unit LED Module Components Location - Model 166 As Of Model Year 2016 With Code 640, 641, 642 (Shown On Model 292)
G14136991Courtesy of MERCEDES-BENZ USA

Shown on model 292 

NOTES Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
REMOVINGINSTALLING Remove/install     
1
REFER TO SELF-DIAGNOSTIC SYSTEMS
Connect diagnostic system and save basic data from left front lamp unit LED module (2) control unit or right front lamp unit LED module (5) control unit Only when replacing the left front lamp unit LED module (2) control unit or right front lamp unit LED module (5) control unit. AD00.00-P-2000-04A
2 Switch on ignition and store transmitter key outside of transmission range (min. 2 m)    
3 Open engine hood and raise to vertical position    
4 Open hose bracket (1) and place hoses to one side When removing the left front lamp unit LED module (2).  
5 Detach hydraulic fluid container (6) from bracket with lines connected and place to one side When removing the right front lamp unit LED module (5).  
6 Remove screws/bolts (3) from left front lamp unit LED module (2) or right front lamp unit LED module (5)    
7 Pull out left front lamp unit LED module (2) or right front lamp unit LED module (5) until electrical connectors (4) are accessible INSTALLATION IMPORTANT Ensure that seal on left front lamp unit LED module (2) or right front lamp unit LED module (5) is seated correctly.  
8 Disconnect electrical connections (4)    
9 Remove left front lamp unit LED module (2) or right front lamp unit LED module (5)    
10 Note series of digits of LAM number Only when replacing the left front lamp unit LED module (2) control unit or right front lamp unit LED module (5) control unit. AR82.10-P-4660GQC 
11 Install in the reverse order    
  Initial startup     
12 Perform SCN coding of left front lamp unit LED module (2) control unit or right front lamp unit LED module (5) control unit Only when replacing the left front lamp unit LED module (2) control unit or right front lamp unit LED module (5) control unit. AR54.21-P-0015X
13
REFER TO SELF-DIAGNOSTIC SYSTEMS
Transfer previously stored basic data to left front lamp unit LED module (2) control unit or right front lamp unit LED module (5) control unit Only when replacing the left front lamp unit LED module (2) control unit or right front lamp unit LED module (5) control unit. AD00.00-P-2000-04A
14 Perform initial startup of left front lamp unit LED module (2) control unit or right front lamp unit LED module (5) control unit Only when replacing the left front lamp unit LED module (2) control unit or right front lamp unit LED module (5) control unit.