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

MODEL 451.3/4

Fig 1: Identifying Airbag Unit On Steering Wheel Remove/Install Components

G10979195

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-0002-01SM
	Legal requirements on handling and storing airbags and emergency tensioning retractor units		AH91.00-P-0004-01A
	If the driver airbag unit (1) is deployed the complete steering wheel (2) must always be replaced
1	Remove steering wheel (2) and place onto a suitable base	For safety reasons, the steering wheel (2) must not be placed onto the driver airbag unit (1) or onto the fanfare horns and airbag clock spring contact (A54). A suitable base would be, e.g. the packaging (4) of a new steering wheel (2).	AR46.10-P-0100MCC
2	Remove coverings for steering wheel spokes		AR46.10-P-0105MCC
3	Undo screws (3) on driver airbag unit (1)	The screws (3) remain on the steering wheel (2).
			*BA91.60-P-1005-01C
4	Remove driver airbag unit (1) from steering wheel (2) until the electrical connectors (5, 6, 7) are accessible	Before positioning the driver airbag unit (1) onto the steering wheel (2), make sure that the springs are correctly seated (arrows). There are three springs (arrows on the steering wheel (2).
5	Detach the electrical connector (lilac) (5), electrical connector (yellow) (6) and the electrical connectors (7) and place the driver airbag unit (1) to one side	If driver airbag unit (1) is being replaced, the defective driver airbag unit (1) must be disposed of properly. Refer to: ↓
		Notes on disposing of airbag and emergency tensioning retractor units	OS91.00-P-0001-01A
6	Install in the reverse order
7	Check supplemental restraint system using STAR DIAGNOSIS	Only when replacing the driver airbag unit (1).
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04MCC

AIRBAG

Number	Designation		Model 451.3	Model 451.4
BA91.60-P-1005-01C	Bolt, airbag to steering wheel	Nm	4	4