Remove/Install Steering Column Module - AR54.25-P-2802FR

Model 257 

Model 290 

Fig 1: Steering Column Module Components Location - Model 290 (Shown On Model 257 Except Code 275)

Courtesy of MERCEDES-BENZ USA

Shown on model 257 except code 275 (Memory Package) 

Courtesy of MERCEDES-BENZ USA

Topical note	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove/install
1	Carry out commissioning of steering column tube module control unit (N80).	When replacing steering column tube module control unit (N80).
			AD00.00-P-2000-06FR
2	Move steering wheel all the way to the rear.
3	Remove steering wheel.		AR46.10-P-0100FR
4	Unclip cover (2) from steering column tube module control unit (N80).	Start unclipping at bottom of cover (2).
		Dismantling tool	Fig 2
5	Detach steering column tube module control unit (N80) from steering column tube.	Do not operate red safety catch in steering column tube module control unit (N80). Otherwise the clock spring contact will be destroyed.
		If the installation position of the steering column tube module control unit (N80) is correct, the assembly indicator (arrow a) is in retracted position.
		When installing a new steering column tube module control unit (N80), the transportation lock (6) must be broken off after installation.
6	Remove locking clip (3) from electrical connector (4).	The locking clip (3) is destroyed and must be replaced.
7	Push back catch hook (arrow c) using a suitable tool between the guide (5) and electrical connector (4).
8	Remove the guide (5) together with the electrical connector (4) and remove steering column tube module control unit (N80) in direction (arrow b).
9	Install in the reverse order.

Fig 2: Identifying Dismantling Tool (000 589 95 63 00)

Courtesy of MERCEDES-BENZ USA