Remove/install airbag unit on the steering wheel - AR91.60-P-0660RA

MODEL 230.4 as of 29.1.08 

MODEL 171.4, 219.3, 230.4 with CODE (809) Model year 2009 

Fig 1: Removing/Installing Airbag Unit On The Steering Wheel - As Of 29.1.08 (1 Of 2)

Courtesy of MERCEDES-BENZ USA

Fig 2: Removing/Installing Airbag Unit On The Steering Wheel - As Of 29.1.08 (2 Of 2)

Courtesy of MERCEDES-BENZ USA

	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
	Notes on performing repair, body work and welding on vehicles with airbags and ETR units		AH91.00-P-0002-01M
	Assessment of airbag and belt tensioner units in accident vehicles		AH91.00-P-0006-01B
	Legal regulations on handling and storing airbags and emergency tensioning retractors		AH91.00-P-0004-01A
1	Adjust driver seat and steering column all the way back
2	Switch off the ignition and remove the transmitter key from the EIS control unit	On vehicles with code (889) Keyless-Go, press KEYLESS-GO start/stop button repeatedly until ignition is switched off. Remove the transmitter key from the vehicle and store it in a location beyond its transmission range (at least 2 meters).
3	Remove brace cover (9) from steering wheel (2)
			Fig 3
4	Insert screwdriver bit into the openings (arrows) at the back of the steering wheel (2) and unscrew the screws out of the driver airbag unit (1)	Screws remain on steering wheel (2).	Fig 4
			*BA91.60-P-1001-01A
5	Remove driver airbag unit (1) from steering wheel (2) until electrical connectors (4) are accessible
6	Separate electrical connectors (4)
7	Disconnect electrical plug (5).	Pay attention to cable routing in bracket (8).
8	Disconnect electrical connector (6)
9	Unclip lock tabs (3) and disconnect electrical connectors (7)	Installation:  The electrical connectors (7) must audibly engage when inserted on driver airbag squib 1 (R12/13) and driver airbag squib 2 (R12/14).	Fig 5
10	Disconnect driver airbag unit (1) from steering wheel (2)	If driver airbag unit (1) is being replaced, the defective driver airbag unit (1) must be properly disposed of. Refer to: Notes on disposing of airbag and emergency tensioning retractor units	OS91.00-P-0001-01A
11	Install in the reverse order
12	Check supplemental restraint system (SRS) with the aid of STAR DIAGNOSIS	Only when the driver airbag unit (1) has been replaced.
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A

Fig 3: Identifying Mounting Wedge (110 589 03 59 00)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying Screwdriver Bit (126 589 00 10 00)

Courtesy of MERCEDES-BENZ USA

Fig 5: Identifying Removal Lever (203 589 04 33 00)

Courtesy of MERCEDES-BENZ USA