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

Model 217, 222 

Courtesy of MERCEDES-BENZ USA

Shown On model 222 

Courtesy of MERCEDES-BENZ USA

	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove/install
1	Perform initial startup of steering column tube module (1)	Only when replacing steering column tube module (1).
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04B
2	Move steering wheel all the way to the rear
3	Remove steering wheel		AR46.10-P-0100LF
4	Unclip cover (2) from steering column tube module (1)	Position the clip remover (3) (as shown) and unclip the cover (2) carefully. Otherwise, the cover (2) may be damaged. Cover (2) not available as replacement part.
		Clip remover	Fig 1
		If cover (2) damaged: ↓ Replace steering column tube module (1).
5	Unclip cover for steering column tube (4) by hand from steering column tube module (1)
6	Pull steering column tube module (1) toward rear until cable duct (5) is accessible	Do not operate the red safety catches in the steering column tube module (1). Otherwise irreparable damage will be caused to the fanfare horns and airbag clock spring contact. When the steering column tube module (1) is in the correct installation position, the assembly indicator (7) is retracted. If the steering column tube module (1) is replaced: ↓ Break off transport lock (8) after assembly.
7	Release cable duct (5) using a suitable screwdriver (6) (arrow A) and unclip from steering column tube cover (4)
8	Remove retaining clip (9) and disconnect electrical connector (10)	The retaining clip (9) is destroyed and must be replaced.
9	Using a metal straightedge (11) (as shown), release catch hook (arrow B) on cable duct (5) and unclip cable duct (5) from steering column tube module (1)	The metal straightedge (11) must not be wider than 20 mm.
10	Remove steering column tube module (1) from steering column tube	The steering column tube module (1) contains the fanfare horns and airbag clock spring contact, the steering wheel angle sensor, the steering column tube module control unit, the DIRECT SELECT lever and the switch units. It is one component and can only be removed or replaced complete.
11	Install in the reverse order

Fig 1: Identifying Clip Remover (452 589 01 63 00)

Courtesy of MERCEDES-BENZ USA