Remove/install steering column module - AR54.25-P-2802RT

MODEL 251

Shown on vehicle with code (441) Electrically adjustable steering column

Fig 1: Identifying Steering Column Module Remove/Install Components - Shown On Vehicle With Code (441)

Courtesy of MERCEDES-BENZ USA

MODIFICATION NOTES

25.11.08

Perform initialization of DTR control unit after replacing steering column tube module, added

Step 8

	Remove/install
	Risk of injury caused by performing testing or repair work on airbag or emergency tensioning retractor units.	Store airbag units with deployment side facing up; do not expose to temperatures greater than 100 °C. When working on these units, disconnect the power supply.	AS91.00-Z-0001-01A
	Risk of explosion caused by escaping oxyhydrogen gas. Risk of injury caused by caustic burns to eyes, skin and mucous membranes from battery electrolyte (contains diluted sulfuric acid) or metal spatter due to short circuit. Risk of burn injuries caused by short circuit. Risk of poisoning caused by swallowing battery electrolyte (contains diluted sulfuric acid) or absorption of lead over the skin or orifices	No fire, sparks, open flames or smoking. Wear acid-resistant gloves and clothing and safety glasses with side guards. Do not place any conductive objects on the battery and avoid any short circuit from battery positive to ground. Only fill liquid battery electrolyte (diluted sulfuric acid) into suitable and appropriately marked containers.	AS54.10-Z-0001-01A
1	Disconnect battery ground line		AR54.10-P-0003RT
2	Remove driver airbag unit	Up to model year 09	AR91.60-P-0660RT
2	Remove driver airbag unit	As of model year 09	AR91.60-P-0660GZA
3	Remove steering wheel		AR46.10-P-0100RT
4	Detach mounting screw (arrow) of steering column module (N80)
5	Carefully detach steering column module (N80) from steering column	The electrical connector (1) disconnects if the steering column module (N80) is detached from the steering column. Do not damage the electrical connector (1)!
6	Install in the reverse order
7	Perform basic programming		AR00.19-P-0200RT
8	Perform initialization of DTR control unit with STAR DIAGNOSIS	After replacing steering column tube module (N80) on vehicles with code (219) Distronic (DTR)