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Home >> Mercedes Benz >> 2011 >> GL350 >> Repair and Diagnosis >> Electrical >> Body Electrical >> Electrical System, Equipment & Instructions - 164 Chassis - 2 Of 4 >> Testing & Repair >> Remove/install button unit on multifunction steering wheel >> Remove/install button unit on multifunction steering wheel - AR54.25-P-2840GZ

Remove/install button unit on multifunction steering wheel - AR54.25-P-2840GZ

MODEL 164, 251 up to Model Year 2008 

Fig 1: Identifying Multifunction Steering Wheel Button Unit Remove/Install Components
G10117150Courtesy of MERCEDES-BENZ USA

Shown on the multifunction steering wheel removed with the Voice control system (VCS [SBS]) (code 813) 

REMOVINGINSTALLING Remove/install     
DANGER Risk of injury  caused by performing testing or repair work on airbag or emergency tensioning retractor units. Store airbag units with deployment side facing up; do not expose to temperatures greater than 100 °C. When working on these units, disconnect the power supply. AS91.00-Z-0001-01A
DANGER Risk of explosion  caused by escaping oxyhydrogen gas. Risk of injury  caused by caustic burns to eyes, skin and mucous membranes from battery electrolyte (contains diluted sulfuric acid) or metal spatter due to short circuit. Risk of burn injuries  caused by short circuit. Risk of poisoning  caused by swallowing battery electrolyte (contains diluted sulfuric acid) or absorption of lead over the skin or orifices No fire, sparks, open flames or smoking. Wear acid-resistant gloves and clothing and safety glasses with side guards.
Do not place any conductive objects on the battery and avoid any short circuit from battery positive to ground.
Only fill liquid battery electrolyte (diluted sulfuric acid) into suitable and appropriately marked containers.
AS54.10-Z-0001-01A
1 Disconnect ground cable from battery Model 164 AR54.10-P-0003GZ 
Model 251 AR54.10-P-0003RT
2 Move steering wheel (1) to horizontal position    
3 Remove airbag unit from steering wheel Model 164 AR91.60-P-0660GZ
Model 251 AR91.60-P-0660RT
4 Separate electrical connectors (4)    
5 Remove bolt (2)    
6 Remove the left steering wheel gear shifter (S110/2) or right steering wheel gear shifter (S111/2) to the rear IMPORTANT Do not disconnect electrically  
7 Remove bolt (3) IMPORTANT Access from the back.  
8 Remove left multifunction steering wheel button group (S110) or remove right multifunction steering wheel button group (S111)    
9 Install in the reverse order