Disassemble/Assemble Multifunction Steering Wheel - AR82.90-P-0010LW

Model 167 With Code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) 

Model 205 as of model year 2019 

Model 290 up to model year 2021 With Code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) 

Courtesy of MERCEDES-BENZ USA

Shown on model 167 With Code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) 

Shown on model 167 With Code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) 

Courtesy of MERCEDES-BENZ USA

Courtesy of MERCEDES-BENZ USA

Shown on model 167 With Code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) 

Courtesy of MERCEDES-BENZ USA

Shown on model 167 With Code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) 

Topical note	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Notes on safety-relevant components		AH00.00-Z-0019-01A
	Disassemble/assemble
1.1	Remove multifunction steering wheel (1).	When replacing multifunction steering wheel (1).
		Model 167 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT))	AR46.10-P-0100ME
		Model 205 as of model year 2019	AR46.10-P-0100LW
		Model 290 up to model year 2021 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT))	AR46.10-P-0100FR
1.2	Remove airbag from multifunction steering wheel (1).	When replacing detachable parts on multifunction steering wheel (1).
		Model 167 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT))	AR91.60-P-0661ME
		Model 205 as of model year 2019	AR91.60-P-0660LW
		Model 290 up to model year 2021 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT))	AR91.60-P-0660FR
2	Disconnect plug contact (2) from horn contact plate (S4/2).
3	Unscrew screws (3) and remove horn contact plate (S4/2) from multifunction steering wheel (1).	Model 167 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) Screw, mounting plate/contact plate to steering wheel	*BA46.10-P-1003-02G
		Model 205 as of model year 2019 Model 290 up to model year 2021 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) Screw, mounting plate/contact plate to steering wheel	*BA46.10-P-1002-02J
4	Unscrew screws (5) and unclip cover (4) from multifunction steering wheel (1).	Long wedge	Fig 1
5	Disconnect electrical connectors (6) from steering wheel electronics (N135) and remove cover (4) from multifunction steering wheel (1)
6	Unscrew screws (9) and remove instrument cluster multifunction steering wheel button group (S163/1) and head unit multifunction steering wheel button group (S163/2) from cover (4).	When replacing cover (4), instrument cluster multifunction steering wheel button group (S163/1) or head unit multifunction steering wheel button group (S163/2).
7	Disconnect electrical connectors (7) from steering wheel electronics (N135).	Model 167 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) Model 205 as of model year 2019 with code 428 (Steering wheel shift paddles) Model 290 up to model year 2021 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT))
8	Unscrew screws (10) and remove steering wheel downshift button (S110/1) and steering wheel upshift button (S111/1) from multifunction steering wheel (1).	Model 167 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) Model 205 as of model year 2019 with code 428 (Steering wheel shift paddles) Model 290 up to model year 2021 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT))
9	Unscrew screws (11) and unclip cover (12) from multifunction steering wheel (1).	Long wedge	Fig 1
10	Unscrew screws (13) and remove cover (14) from multifunction steering wheel (1).
11	Fold up locks (15) on both sides of lower multifunction steering wheel button group electric controller unit (A74/2) and remove electric lines (17) from lower multifunction steering wheel button group electric controller unit (A74/2).	Model 167 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) Model 205 with engine 177 as of model year 2019 Model 290 up to model year 2021 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT))
12	Disconnect plug contact (16) from lower multifunction steering wheel button group electric controller unit (A74/2).	Model 167 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) Model 205 with engine 177 as of model year 2019 Model 290 up to model year 2021 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT))
13	Unscrew screws (18) and remove lower multifunction steering wheel button group 1 (S163/3) and lower multifunction steering wheel button group 2 (S163/4) from multifunction steering wheel (1).	Model 167 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) Model 205 with engine 177 as of model year 2019 Model 290 up to model year 2021 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT))
14	Disconnect electrical connector (19).	Only with fitted multifunction steering wheel (1
15	Remove steering wheel electronics (N135) from multifunction steering wheel (1).
16	Assemble in the reverse order.
17	Connect vehicle diagnosis system and perform commissioning.	Model 167 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) Model 205 with engine 177 as of model year 2019 Model 290 up to model year 2021 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) Only when replacing lower multifunction steering wheel button group electric controller unit (A74/2).
		Model 167 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT))	AD00.00-P-2000-06ME
		Model 205 with engine 177 as of model year 2019	AD00.00-P-2000-04B
		Model 290 up to model year 2021 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT))	AD00.00-P-2000-06FR
18	Disconnect vehicle diagnosis system.	Model 167 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) Model 205 with engine 177 as of model year 2019 Model 290 up to model year 2021 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) Only when replacing lower multifunction steering wheel button group electric controller unit (A74/2).

Fig 1: Identifying Long Wedge (115 589 03 59 00)

Courtesy of MERCEDES-BENZ USA