Remove/install rear control unit - AR54.21-P-2009GQ

MODEL 166.0 

Shown on model 166.024 

Fig 1: Identifying Rear Control Unit Remove/Install Components - Shown On Model 166.024

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
1	Connect STAR DIAGNOSIS and perform initial startup of rear control unit (N108)	When replacing rear control unit (N108)
			AD00.00-P-2000-04A
2	Switch off ignition and remove transwithter key or KEYLESS-GO start/stop button from electronic ignition lock control unit	KEYLESS-GO start/stop button only with code 889 (Keyless-Go).
3	Remove rear seat cushion	60 % rear seat cushion	AR91.12-P-1020GQ
		40 % rear seat cushion	AR91.12-P-1020GQA
4	Remove rear seat backrest	60 % rear seat backrest	AR91.12-P-1620GQ
		40 % rear seat backrest	AR91.12-P-1620GQA
5	Remove rear door sill moldings		AR68.30-P-4100GQ
6	Raise floor coverings (2) and place to one side
7	Unscrew nut (3)
8	Detach electrical lines (4) from rear control unit (N108)	The number of electrical lines (4) depends on the vehicle equipment.
9	Remove control unit (N108) from frame floor assembly and remove
10	Install in the reverse order