Remove/install electronic stability program (ESP) control unit - AR42.45-P-0820SX

MODEL 216.### 1# 

MODEL 221.### 1# 

Fig 1: Identifying Electronic Stability Program Control Unit Components (1 Of 2)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Electronic Stability Program Control Unit Components (2 Of 2)

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Information on preventing damage to electronic components due to electrostatic discharge	AH54.00-P-0001-01A
1	Switch off ignition
2	Remove right engine intake air duct
3	Remove expansion reservoir (1) of power steering from holder (1a)	Vehicles with electrohydraulic power steering (EHPS) Release expansion reservoir (1), remove upwards and place to one side with hoses attached.
4.1	Remove holder (1a) for power steering expansion reservoir (1)	Vehicles with EHPS
4.2	Detach electrical connector from coolant expansion reservoir (2) and place coolant expansion reservoir (2) to one side with lines connected	Vehicles without EHPS
	Clean
5	Clean the surroundings of the electrical connector (3) and the control unit (N47-5)	Before opening the brake system the area around the separation point should be cleaned thoroughly. Even the smallest particles of dirt, introduced into the hydraulic components, can lead to malfunctions and a total failure of the brake system. 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. Cleaner from package	*BR00.45-Z-1028-04A
6	Separate electrical connector (3) from control unit (N47-5)	Observe notes, otherwise damage to the locking mechanism can occur! In order to avoid damage and malfunctions, do not touch, deform or damage contacts of connector and jack! Do not allow any foreign objects, dirt fluids to enter the jack or connector!	AR42.45-P-0820-02T
7	Remove bolts (5)	Installation:  Maintain torque exactly Too large torque values lead to damage to the control unit (N47-5), too low to a defective connection of the contact areas. Installation:  Replace bolts (5).	*BA42.45-P-1002-01L
8	Detach control unit (N47-5) from hydraulic unit (A7/3) and remove	In order to avoid damage, neither touch the contact areas and silicon seal by hand nor with a tool.
9	Remove O-rings (6) of valve dome (7) by hand	Do not use a tool otherwise the hydraulic unit (A7/3) will be damaged.
	Clean
10	Clean the sealing surface on the hydraulic unit (A7/3)	Cleaner from package	*BR00.45-Z-1028-04A
11	Install in the reverse order
12	Commission control unit (N47-5) using STAR DIAGNOSIS	Under "control units" - "suspension" - "ABR" select the menu item "commissioning" and process all steps.
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A

ELECTRONIC STABILITY PROGRAM (ESP)

Number	Designation		Model 216	Model 221
BA42.45-P-1002-01L	Bolt, ESP control unit to traction system hydraulic unit	Nm	2	2

REPAIR MATERIALS

Number	Designation	Order number
BR00.45-Z-1028-04A	Cleaner from package	Adolf Wurth GmbH&Co. KG Reinhold-Wurth-Str. 12-17 74653 Kunzelsau-Gaisbach Germany Tel. +49 7940 15-0 Fax +49 7940 15-1000 www.wuerth.de