Remove/Install Engine Mount And Differential Lock Control Unit - AR54.21-P-0080FR

Model 290 

as of model year 2021 

with code 466 (Active engine mount) 

Model 290 

as of model year 2021 

with code 467 (Electronic locking differential) 

Fig 1: Engine Mount And Differential Lock Control Unit Components Location - Model 290 As Of Model Year 2021 With Code 466, 467

Courtesy of MERCEDES-BENZ USA

	Risk of injury  caused by fingers being jammed or pinched when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof.	No parts of the body or limbs should be within the operating area when the components are moving.	AS00.00-Z-0011-01A
	Risk of injury  caused by scraping or cutting body parts on sharp vehicle parts	Always wear protective gloves when working on or near sharp and non-deburred vehicle parts. Deburr repair panels.	AS00.00-Z-0017-01A
Notice	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Notes on HANDS-FREE ACCESS		AH80.61-P-0001-01A
	Remove/install
1	Switch off ignition and store transmitter key outside of transmitter range (min. 2 m).
2	Remove side load compartment trim (2).		AR68.30-P-1185FRX
3	Release and disconnect electrical connector from engine mount and differential lock control unit (N187).
4	Remove nuts (1) and remove engine mount control unit and differential lock (N187).	Nut control unit for engine mount and differential lock to holder	*BA54.21-P-1005-01E
5	Install in the reverse order.
6	Commission control unit for engine mount and differential lock (N187).	When replacing control unit of engine mount and differential lock (N187).
			AD00.00-P-2000-06FR