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

MODEL 207.3 

Fig 1: Identifying Rear Control Unit Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
1	Buffer basic data of rear control unit (N22/6) in STAR DIAGNOSIS	When replacing rear control unit (N22/6).
		Transfer buffered basic data to new rear control unit (N22/6).
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
2	Switch off ignition and remove transmitter 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	Unlock left rear backrest (1) and put down forwards
4	Remove expanding clips (2) and loosen paneling (3) until rear control unit (N22/6) is accessible		Fig 2
5	Separate electrical connectors (4)
6	Loosen locks (arrows), take rear control unit (N22/6) upwards out of supports (5) and remove
7	Install in the reverse order

Fig 2: Identifying Snap-Release Tool (452 589 01 63 00)

Courtesy of MERCEDES-BENZ USA