Remove/Install Hand Detection Control Unit - AR82.90-P-0201FRB

Model 118, 247 as of model year 2023 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) 

Model 167 as of model year 2022 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) 

Model 177 as of model year 2022 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) 

Model 192, 232 

Model 290 as of model year 2021 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) 

Courtesy of MERCEDES-BENZ USA

Fig 1: Hand Detection Control Unit Components Location - Model 290 Up To Model Year 2021 With Code U88

Courtesy of MERCEDES-BENZ USA

Notice	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove/install
1	Remove driver's airbag from steering wheel.
		Model 167 as of model year 2022 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT))	AR91.60-P-0661ME
		Model 118, 247 as of model year 2023 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) Model 177 as of model year 2022 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT))	AR91.60-P-0663MFD
		Model 192, 232	AR91.60-P-0663SLY
		Model 290 as of model year 2021 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT))	AR91.60-P-0660FR
2	Remove screws (1).	Model 167 as of model year 2022 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) Screw, mounting plate/contact plate to steering wheel	*BA46.10-P-1003-02G
		Model 192, 232	*BA46.10-P-1006-02A
		Screw, mounting plate/contact plate to steering wheel
		Model 290 as of 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
		Model 118, 247 as of model year 2023 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) Model 177 as of model year 2022 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) Screw, mounting plate/contact plate to steering wheel	*BA46.10-P-1002-02F
3	Remove mounting plate (2) and release and disconnect electrical connector.	Ensure correct engagement of electrical connector.
4	Remove washers of screws (1).	If washers are installed.
5	Unclip hand detection system control unit (N179) from steering wheel electronics (N135).
6	Release and disconnect electrical connectors on hand detection system control unit (N179), and remove hand detection system control unit (N179).	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.
		Ensure that the electrical connectors are engaged correctly.
		Ensure that routing of lines is correct.
7	Install in the reverse order.
	Concluding tasks
8	Connect diagnostic system and perform commissioning.	When replacing hand detection system control unit (N179).
		Model 167 as of model year 2022 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT))	AD00.00-P-2000-06ME
		Model 118, 247 as of model year 2023 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) Model 177 as of model year 2022 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT))	AD00.00-P-2000-06MFA
		Model 192, 232 Model 290 as of model year 2021 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT))	AD00.00-P-2000-06FR
9	Perform function test of steering wheel buttons.