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Home >> Mercedes Benz >> 2018 >> GLS450 >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Electrical System, Equipment & Instruments - 166 Chassis 4 Of 8 >> Testing & Repair >> Remove/Install Touchpad Control Unit - AR54.21-P-0503GQA

Remove/Install Touchpad Control Unit - AR54.21-P-0503GQA

Model 166 as of model year 2016 with code 522 (Audio 20 CD including preinstallation for Garmin® MAP PILOT) 

Model 166 as of model year 2016 with code 531 (COMAND® APS) 

Model 292 with code 522 (Audio 20 CD including preinstallation for Garmin® MAP PILOT) 

Model 292 with code 531 (COMAND® APS) 

Fig 1: Touchpad Control Unit Components Location - Model 166 As Of Model Year 2016 With Code 522, 531
G14132291REMOVINGINSTALLINGREFER TO SELF-DIAGNOSTIC SYSTEMSCourtesy of MERCEDES-BENZ USA
Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Remove front central operating unit control unit (3)   AR54.21-P-0500GQA 
2 Unscrew bolts (1)    
3 Pull touchpad (A105) out of front central operating unit control unit (3) (arrow)    
4 Install in the reverse order    
5 Commission touchpad (A105) Only when replacing the touchpad (A105).  
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-04A