Remove/Install Electronic Stability Program (ESP®) Control Unit - AR42.45-P-0820LF

Model 217, 222 

Shown on model 222 

Courtesy of MERCEDES-BENZ USA

Shown on model 222 

Courtesy of MERCEDES-BENZ USA

Topical note	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove/install
1	Switch off ignition and remove transmitter key
2	Remove appropriate cover on traction system hydraulic unit (A7/3)
3	Unscrew nuts (1) and detach retaining clip (2) from strut on left front wheel well
4	Unclip electrical line from engine fuse and relay module (K40/8) and place engine fuse and relay module (K40/8) to one side
	Clean
5	Clean area around electrical connector (3) and Electronic Stability Program control unit (N30/4)	Before opening the brake system the area around the separation point should be cleaned thoroughly. Only use clean, lint free rags and cleaner free of mineral oil. Do not use any compressed-air for cleaning when the brake system is open. Even the smallest particles of dirt, introduced into the hydraulic components, can lead to malfunctions and a total failure of the brake system.
		Assembly cleaner	*BR00.45-Z-1028-04A
6	Disconnect electrical connector (3) from ESP® control unit (N30/4)	The work instructions for disconnecting the electrical connector (3) must be followed. Otherwise damage can be caused to the locking mechanism. Do not touch, deform or damage the contacts of the electrical connector (3) and the jack at the ESP® control unit (N30/4). Do not allow any foreign objects, dirt or fluids to enter into the jack or the electrical connector (3). The Electronic Stability Program control unit (N30/4) can otherwise be damaged and malfunction.	AR42.45-P-0820-02EW
		Unlocking tool	Fig 1
7	Unscrew bolts (4) and remove Electronic Stability Program control unit (N30/4)	Replace screws/bolts (4).
		Screw/bolt, ESP control unit® to traction system hydraulic unit	*BA42.45-P-1003-01O
	Clean
8	Clean sealing surface on traction system hydraulic unit (A73)	Assembly cleaner	*BR00.45-Z-1028-04A
9	Install in the reverse order
10	Conduct initial startup of Electronic Stability Program control unit (N30/4)	When replacing Electronic Stability Program control unit (N304)
			AD00.00-P-2000-04B

ELECTRONIC STABILITY PROGRAM (ESP®)

Number	Designation		Model 217	Model 222
BA42.45-P-1003-01O	Screw/bolt, ESP control unit® to traction system hydraulic unit	Nm	3	3

Fig 1: Identifying Unlocking Tool (000 589 20 63 00)

Courtesy of MERCEDES-BENZ USA

REPAIR MATERIALS

Number	Designation	Order number
BR00.45-Z-1028-04A	Assembly cleaner	A 000 986 56 01