Remove/install rear seat control unit - AR91.29-P-1570SX

MODEL 221.0 with CODE (223) Rear bench seat with electrically adjustable outer seats with PRE-SAFE positioning function for outer seats and outer head restraints with CODE (402) Rear deluxe seats, incl. seat heating and seat ventilation with CODE (872) Electrically heated left and right rear seats 

MODEL 221.1 with CODE (223) Rear bench seat with electrically adjustable outer seats with PRE-SAFE positioning function for outer seats and outer head restraints with CODE (224) Rear individual seat design with CODE (402) Rear deluxe seats, incl. seat heating and seat ventilation with CODE (872) Electrically heated left and right rear seats 

Fig 1: Identifying Rear Seat Control Unit Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Notes on avoiding damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
1	Switch off ignition and withdraw transmitter key or Keyless Go start/stop button from the EIS [EZS] control unit	Keyless Go start/stop button only for vehicles with code (889) Keyless Go.
2	Release side trunk paneling (3) and swivel to side until rear seats control unit (N25/6) is accessible	Do not bend the hinge arm passage frame (2) otherwise the plastic will become discolored.
		Vehicles without code (Z07) Top protection	AR68.30-P-4600SX
		Vehicles with code (Z07) Top protection	AR68.30-P-4600SXS
3	Release catch hook (4)
4	Disconnect electrical connectors from rear seats control unit (N25/6) and remove rear seats control unit (N25/6)
5	Install in the reverse order