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Dynamic seat, function - GF91.25-P-0002LEA

MODEL 221.0 /1 with CODE (432) Left and right dynamic multicontour seat as of model year 2010 /YoM 09 MOPF 

Function requirements, general 

Function description for dynamic multicontour seat, general 

The dynamic multicontour seat (DS [FDS]) combines the advantages of a comfortable multicontour seat with those of a sport seat. Here, a base pressure in the lateral support cushions automatically adjusts the seat's lateral support. The dynamics function enhances the lateral support when cornering. For this, the lateral support is improved during cornering by means of an automatic pressure increase of the lateral support cushions (side bolsters) on the outside of the curve. The inflation intensity can be adjusted using the front central operating unit (A40/9) in 2 stages. This essentially happens as a function of the current vehicle speed and the lateral acceleration.

To prevent any tension in the back during long journeys, the multicontour seat is equipped with a massage (pulse mode) function. As long as the massage function is active, the contour of the 7-layer massage insert is sequentially altered by inflating, maintaining and relieving the pressure. The massage function can be individually set in 4 stages by the rotary pushbutton (A40/9s11). Adherence to the set pressure values as well as the specified pressures of the individual cushion areas is continuously being regulated. The front central operating unit can be used to manually adjust the various air cushions in the dynamic multicontour seat, actuated by the left front dynamic seat control unit (N32/19) or right front dynamic seat control unit (N32/22).

When the pulse function is switched on (massage function), the following are actuated automatically:

The corresponding seat massage actuator motor then pneumatically actuates the 7 massage air cushion rows positioned one above the other in the massage insert.

The dynamic multicontour seat system is available in a version for the left seat and a version for the right seat.

The air supply, required for inflating the seat cushions, is provided by the pneumatic pump for dynamic seat control (M40/1). The adjusted contours can be saved.

Priorities 

When several functions are requested at the same time, only the adjustment motion with the highest priority is executed.

Priority 1: Lateral backrest support

Priority 2: Lumbar support

Priority 3: Lateral seat cushion support

Priority 4: Shoulder cushions

Priority 5: Dynamic multicontour seat

Priority 6: Massage function (pulsation or dynamic lumbar support)

IMPORTANTPRE-SAFE 

In critical situations, the air cushions are inflated in the side area in the event of an accident; on the front multicontour seats the air cushions in the lumbar are deflated additionally; this is accomplished to obtain a more favorable seat position and arrest the passengers' bodies. For more detailed information refer to the PRE-SAFE system description.

The dynamic multicontour seat system enables the following subfunctions, which are described in separate documents:

  Dynamic seat, location of components   GF91.25-P-0002-01LEA 
  Dynamic seat, block diagram   GF91.25-P-0002-03LEA 
  Manually filling/deflating the air cushions on the dynamic seat, function   GF91.25-P-2011LEA 
  Dynamic lateral support at dynamic seat, function   GF91.25-P-2013LEA 
  Position storage of dynamic seat with memory, function with code (275) Memory package for electrically adjustable front seats GF91.25-P-2014LEA 
  Massage function for dynamic seat, function   GF91.25-P-2016LEA 
  COMAND controller unit, component description A40/3
On vehicles with code (526) COMAND with single DVD drive (without navigation) or with code (527) COMAND APS with single DVD drive (with navigation)		 GF82.85-P-3136LE
On vehicles with code (529) HIGH Class Japan GF82.85-P-3136LEJ
On vehicles with code (530) COMAND APS USA (with navigation) GF82.85-P-3136LEU
  COMAND display, component description A40/8
Vehicles without code (867) SPLITVIEW		 GF54.30-P-6110LE
  Front central operating unit, component description A40/9 GF54.21-P-4500LE
  SPLITVIEW display, component description A40/10
Vehicles with code (867) SPLITVIEW		 GF54.30-P-6120LE
  Pneumatic pump for dynamic seat, component description M40/1 GF91.25-P-5204LE 
  Left front seat control unit, component description N32/1 GF91.29-P-5230LE 
  Right front seat control unit, component description N32/2 GF91.29-P-5240LE 
  Dynamic seat control unit, component description N32/19, N32/22 GF91.25-P-5202LEA 
  Left front door control unit, component description N69/1 GF72.29-P-4141LE
  Right front door control unit, component description N69/2 GF72.29-P-4142LE
  Component description for EIS [EZS] control unit N73 GF80.57-P-6003LE
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