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Dynamic lumbar support on dynamic seat, function - GF91.25-P-2015SX

MODEL 216.3, 221.0 /1 with CODE (432) Left and right dynamic multicontour seat up to Model Year 8 

Fig 1: Dynamic Seat Dynamic Lumbar Support Function Diagram
G07601671Courtesy of MERCEDES-BENZ USA

Function requirements 

Function 

In order to prevent tensions in the back during longer drives, the dynamic seats are equipped with the dynamic lumbar support (massage) function.

By pressing the multicontour seat quick select button (A40/9s4) in the front central operating unit, the "Pulse mode" submenu is activated in the COMAND display and the air cushions in the lumbar support area are alternately filled and deflated.

The massage function can be individually set using the turn/push control (A40/9s11):

  COMAND controller unit, component description A40/3
Model 221 without code (498) Japan version and without code (494) USA version
GF82.85-P-3136SX
Model 221 with code (494) USA version GF82.85-P-3136SXU
Model 221 with code (498) Japan version GF82.85-P-3136SXJ
  Cockpit central display, component description A40/8
Model 221
GF54.30-P-6100SX
  Front central operating unit, component description A40/9
Model 221
GF54.21-P-4500SX
  Pneumatic pump for dynamic seat, component description M40/1 GF91.25-P-5204SX 
  Dynamic seat control unit, component description N32/19, N32/22 GF91.25-P-5202SX 
  Electronic ignition/starter switch control unit (EIS) component description N73 GF80.57-P-6000SX
  Central gateway control unit, component description N93 GF54.21-P-4170SX