Remove/Install Rear Door Closing Control Module - AR72.20-P-7551GQ

MODEL 166.0 

with CODE (890) Automatic rear-end door 

Except Code Z04 (Light Armoring) 

Except Code Z05 (B5 armoring on special protection version) 

MODEL 166.8 

Shown on model 166.004 

Fig 1: Rear Door/Tailgate Closing Control Module Components Location - Model 166.8 (Shown On Model 166.004)

Courtesy of MERCEDES-BENZ USA

Illustrated on model 166.873 

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
1	Switch off ignition and remove the transmitter key from the EIS [EZS] control unit	On vehicles with code (889) KEYLESS-GO: Press KEYLESS-GO start/stop button repeatedly until ignition is switched off. Remove transmitter key from vehicle and store it in a location beyond its transmission range (at least 2 m).
2.1	Remove right side paneling (1) in trunk	Model 166.0	AR68.30-P-4800GQ
2.2	Remove right side stowage box/tray in trunk	Model 166.8
		Assembly wedge	Fig 2
3	Unscrew nut (3) and remove liftgate control unit (N121/1)
4	Separate electrical connectors (2)
5	Install in the reverse order
6	Normalize liftgate control unit (N121/1)	When replacing liftgate control unit (N121/1).

Fig 2: Identifying Mounting Wedge (110 589 03 59 00)

Courtesy of MERCEDES-BENZ USA