Fold up rear head restraints, function - GF91.16-P-2001SX

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 

The head restraints in the rear can be adjusted, raised or folded down individually. Folding up the rear head restraints serves the safety and the comfort of the rear passengers.

The rear head restraints are raised by:

• actuating the head restraint folding button in the front central operating unit or
• actuating the left rear or right rear head restraint adjustment switch or
• closing the seat belt buckle.

Raising via the head restraint folding button 

When the head restraint folding button in the front central operating unit is pushed forwards, the rear seats control unit receives the message for raising the two outer rear head restraints via the interior CAN.

The rear seats control unit actuates the left or right rear head restraint inclination adjustment motor, whereupon the head restraints are raised up toward the front.

Raising via the head restraint adjustment switches 

By actuating the head restraint adjustment switches, the adjustment request is read in by the corresponding door control unit via the door-LIN. The message for raising the respective rear head restraint is transmitted to the rear seats control unit via the interior CAN.

The rear seats control unit actuates the corresponding head restraint inclination adjustment motor and the corresponding head restraint is raised.

Raising via seat belt buckle request 

Automatically raising the left and right rear head restraints serves the safety and the comfort of the respective buckled rear passenger.

The rear SAM control unit reads in the switching state of the left and right rear seat belt buckle switch and thus recognizes whether the seat belt latch of the corresponding seat belt is inserted in the seat belt buckle.

If this is the case, the rear seats control unit actuates the left or right rear head restraint inclination adjustment motor.

	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
	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
	Seat belt buckle switch, component description	S68/11, S68/12	GF91.60-P-4045SX