Remove/Install Airbag Unit On Steering Wheel - AR91.60-P-0660FR

Model 257 

Model 290 

Shown on model 257 up to model year 2021 

Fig 1: Airbag Unit On Steering Wheel Components Location - Model 290 (Shown On Model 257)

Courtesy of MERCEDES-BENZ USA

Courtesy of MERCEDES-BENZ USA

Shown on model 257 up to model year 2021 

Shown on model 257 as of model year 2021 

Courtesy of MERCEDES-BENZ USA

	Risk of injury  during testing and repair operations related to pyrotechnical components	Do not expose pyrotechnical component parts to temperatures above 100°C or 212°F. Disconnect current supply when working on such component parts.	AS91.00-Z-0008-01A
Topical note	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Information, assessment and legal requirements when working with, handling and storing pyrotechnical components		AH91.00-Z-0000-10A
	Notes on safety-relevant components		AH00.00-Z-0019-01A
	Remove/install
1	Move steering wheel (6) all the way upward.
2	Disconnect ground line from battery.		AR54.10-P-0003FR
3.1	Insert hexagon socket screwdriver (1) into right and left opening (arrow) on steering wheel (6) and push corresponding end of spring (2) inwards until the driver's airbag (4) is released.	Model 257 up to model year 2021 Model 290
		Angle: a = approx. 25°
		Use commercially available Allen wrench (1) with a size of 4 mm.
		When removing the driver's airbag (4) for the first time, the right and left opening (arrow) at the steering wheel (6) must be pierced.
		The ends of the spring (2) must audibly engage into the mounts (5) of the driver's airbag (4).
3.2	Insert extraction hook (7) into release opening (8) on steering wheel (6).	Model 257 as of model year 2021
		When removing the driver airbag (4) for the first time, pierce the release opening (8) on the steering wheel (6).
		Extraction hook	Fig 2
4	Release safety spring (9) of driver's airbag (4) using extraction hook (7) in direction of arrow and lift off steering wheel (6).	Model 257 as of model year 2021
		The driver's airbag (4) must audibly engage in the steering wheel (6).
5	Remove driver's airbag (4) then release and disconnect electrical connector (3).	Do not crush or kink or subject electric lines to tension. This will result in damage to the electric lines and can impair their function.
		Make sure that the electrical connector (3) engages properly.
6	Dispose of driver's airbag (4) properly.	When replacing driver's airbag (4).
7	Install in the reverse order.
8	Check Supplemental Restraint System (SRS) using diagnostic system.	When replacing driver's airbag (4).
			AD00.00-P-2000-06FR

Fig 2: Identifying Extraction Hook (140 589 02 33 00)

Courtesy of MERCEDES-BENZ USA