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Remove/install dynamic seat switch - AR91.25-P-1820EW

MODEL 212 up to model year 2014 with CODE 432 (Left and right dynamic multicontour seat) 

MODEL 218 up to model year 2015 with CODE 432 (Left and right dynamic multicontour seat) 

Fig 1: Identifying Dynamic Seat Switch Remove/Install Components - Shown on model 212
G09978051Courtesy of MERCEDES-BENZ USA

Shown on model 212 

REMOVINGINSTALLING Remove/install     
1 Push left or right seat cushion (1) far enough to one side to access the supports (arrows A) of the front passenger active multicontour seat button group (S108) or the driver active multicontour seat button group (S109)    
2 Unclip supports (arrows A) of front passenger active multicontour seat button group (S108) or driver active multicontour seat button group (S109) at the lug catch hooks (arrows C) INSTALLATION IMPORTANT Ensure correct seating of the supports (arrows A) in the lugs (arrows C).  
3 Push front passenger active multicontour seat button group (S108) or driver active multicontour seat button group (S109) far enough upwards out of bracket (2) until the electrical wiring harness (3) can be removed from the opening (arrow E) of the bracket (2) INSTALLATION IMPORTANT Ensure correct seating of front passenger active multicontour seat button group (S108) or driver active multicontour seat button group (S109) in the lug (arrow B) of bracket (2).  
4 Remove electrical wiring harness (3) from the opening (arrow E) of bracket (2) INSTALLATION IMPORTANT Ensure correct seating of the electrical wiring harness (3).  
5 Unclip electrical wiring harness (3) from bracket (2) (arrow D) INSTALLATION IMPORTANT Ensure correct seating of the electrical wiring harness (3) in bracket (2) (arrow D).
SPECIAL TOOL Clip remover
Fig 2
6 Lift front passenger active multicontour seat button group (S108) or driver active multicontour seat button group (S109) far enough until the electrical connector (4) can be disconnected    
7 Disconnect electrical connector (4)    
8 Remove front passenger active multicontour seat button group (S108) or driver active multicontour seat button group (S109)    
9 Install in the reverse order    
Fig 2: Identifying Clip Remover (452 589 01 63 00)
G09978052Courtesy of MERCEDES-BENZ USA