Fold down rear head restraints, function - GF91.16-P-2000SXA

MODEL 221.0 /1 with CODE (223) Rear bench seat with electrically adjustable outer seats with PRE-SAFE positioning function for outer seats and outer head restraints up to Model Year 8 

Function requirements: 

• C. 15 ON

Function 

By folding down the rear head restraints of the non-occupied rear seats, the driver is able to create unimpeded visibility through the rear window as needed.

The rear head restraints are folded down by:

• actuating the head restraint folding button in the front central operating unit
• actuating the left rear or right rear head restraint adjustment switch
• engaging the reverse gear

Folding down via the head restraint folding button 

When the head restraint folding button in the front central operating unit is pressed, the rear seats control unit receives the message for folding down the two outer rear head restraints via the interior CAN, as well as the rear SAM control unit to fold down the center head restraint.

The rear seats control unit actuates the left or right rear head restraint inclination adjustment motor, whereupon the corresponding head restraints are folded to the rear and down. The rear SAM control unit forwards the message for folding down the center head restraint to the rear head restraints valve block and to the lumbar pump or the pneumatic pump. The center head restraint is unlocked pneumatically via the head restraint mechanism and folded to the rear and down via a lever linkage.

Folding down via the head restraint adjustment switch 

The actuation of the head restraint adjustment switch is read in by the left rear door control unit or by the right rear door control unit via the rear door-LIN and forwarded to the rear seats control unit via the interior CAN.

The rear seats control unit then actuates the left or right rear head restraint inclination adjustment motor.

Folding down when engaging the reverse gear 

The servo module for DIRECT SELECT forwards the "Reverse gear engaged" signal to the CDI control unit or the ME-SFI [ME] control unit via the drive train CAN.

The CDI control unit or the ME-SFI [ME] control unit forwards the signal to the central gateway control unit via the chassis CAN. The latter forwards the signal to the rear seats control unit and the rear SAM control unit via the interior CAN. The rear seats control unit actuates the left or right rear head restraint inclination adjustment motor. The rear SAM control unit forwards the message for folding down the center head restraint to the rear head restraints valve block and to the lumbar pump or the pneumatic pump. The center head restraint is unlocked pneumatically via the head restraint mechanism and folded down via a lever linkage.

	COMAND control unit, component description	A40/3 On vehicles without code (498) Japan version and without code (494) USA version	GF82.85-P-3136SX
		On vehicles with code (498) Japan version	GF82.85-P-3136SXJ
		On vehicles with code (494) USA version	GF82.85-P-3136SXU
	Front central operating unit, component description	A40/9	GF54.21-P-4500SX
	Intelligent servo module (ISM) component description	A80	GF27.19-P-4015SX
	Lumbar pump, component description	M25/1 On vehicles without code (409) Left/right front multicontour seats and without code (432) Left and right dynamic multicontour seat	GF91.29-P-5260SX
	Multicontour seat pneumatic pump (MCS [MKS]), component description	M40 On vehicles with code (409) Left/right front multicontour seats	GF91.25-P-5205SX
	Pneumatic pump for dynamic seat, component description	M40/1 On vehicles with code (432) Left and right dynamic multicontour seat	GF91.25-P-5204SX
	CDI control unit component description	N3/9 In vehicles with engine 642	GF07.16-P-6000SX
	ME-SFI [ME] control unit, component description	N3/10 For vehicles with engines 272.965, 273.961	GF07.61-P-6000V
	Rear SAM control unit with fuse and relay module, component description	N10/2	GF54.21-P-6030SX
	Rear seats control unit, component description	N25/6	GF91.29-P-5250SXA
	Rear door control module component description	N69/3, N69/4	GF72.29-P-6020SX
	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
	Rear seat adjustment switch group, component description	S55/1, S55/2	GF91.29-P-5216SXA