Remove/install overhead control panel control unit - AR82.20-P-1000W

MODEL 172.4 

Fig 1: Identifying Overhead Control Panel Control Unit Remove/Install Components

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	Remove/install
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
1	Carry out initial startup of overhead control panel control unit (N70) using Star Diagnosis	When installing new overhead control panel control unit (N70).
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
2	Open Vario roof
3	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 on vehicles with code (889) Keyless-Go.
4	Unclip covering (1) downwards (arrow A)	Long wedge	Fig 3
5	Unclip panel (2)	On vehicles with code (882) Interior monitoring (only with ATA [EDW]), the anti-theft alarm system/emergency call system button group is installed in the panel (2). In this case, let the cover (2) with the anti-theft alarm system/emergency call system button group hang down with connected electrical lines.
6	Swivel left and right sun visor (3) to one side
7	Remove counter bearing on left and right sun visor (3)	Mounting wedge	Fig 2
8	Detach left and right lining on inside of A-pillar (4) from overhead control panel control unit (N70)	Mounting wedge	Fig 2
9	Open glasses compartment (5) and remove screws/bolts (6)
10	Unclip overhead control panel control unit (N70) from retaining spring (7)	Mounting wedge	Fig 2
11	Disconnect electric connectors (8) from overhead control panel control unit (N70)	The number of electrical connectors (8) depends on the vehicle equipment.
12	Install in the reverse order

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

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Fig 3: Identifying Long Wedge (115 589 03 59 00)

Courtesy of MERCEDES-BENZ USA