Remove/Install Rear Control Unit - AR54.21-P-2009LWR

Model 205.4 

up to model year 2019 

Fig 1: Rear Control Unit Components Location - Model 205.4 Up To Model Year 2019

Courtesy of MERCEDES-BENZ USA

Shown with code 501 (360° camera), code 537 (Digital radio (DAB)), code 865 (TV tuner) and code U77 (BlueTEC (SCR) diesel exhaust treatment) 

	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove/install
1	Commission rear control unit (N22/6).	When replacing the rear control unit (N22/6).
			AD00.00-P-2000-04B
2	Switch off ignition and store transmitter key outside of transmission range (min. 2 m).
3	Remove rear load compartment floor.
4	Remove luggage compartment well cover.
5	Unscrew nuts (1), remove bolts (2) and place holder (3) with attached control units to one side.	Model 205.4 up to model year 2019 with code 501 (360° camera) Model 205.4 up to model year 2019 with code 536 (SIRIUS satellite radio) Model 205.4 up to model year 2019 with code 537 (Digital radio (DAB)) Model 205.4 up to model year 2019 with code 865 (TV tuner) Do not disconnect electrical connectors of control units.
6	Press catch hooks (arrows), move out rear control unit (N22/6) and disconnect its electrical connectors.	Model 205.4 up to model year 2019 with code U77 (Diesel Emission control BLUETEC (SCR)) Do not remove holder (4).
7	Install in the reverse order.