Remove/Install ETS/ASR/ESP Hydraulic Unit - AR42.40-P-0816W

Model 172 

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of poisoning  caused by swallowing Brake fluid. Risk of injury  caused by Brake fluid coming into contact with skin and eyes.	Only pour Brake fluid into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling Brake fluid.	AS42.50-Z-0001-01A
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Brake fluid notes		AH42.50-P-0001-01A
	Notes on repairs to Brake system		AH42.00-P-0003-01A
1	Switch off ignition and remove transmitter key or KEYLESS-GO start/stop button from electronic ignition lock control unit	KEYLESS-GO start/stop button only on vehicles with code (889) Keyless-Go.
	Clean
2	Clean traction system hydraulic unit (A7/3) at Brake lines (3)	Cleaner from package	*BR00.45-Z-1028-04A
3	Disconnect electrical connector (2) from Electronic Stability Program control unit (N30/4)	It is essential to precisely follow the work instructions for disconnecting the electrical connector (2). The locking mechanism can otherwise be damaged. Do not touch, deform or damage the contacts of the electrical connector (2) and of the jack on the Electronic Stability Program control unit (N30/4). Do not allow foreign objects, dirt or fluids to enter the jack or electrical connector (2). The Electronic Stability Program control unit (N30/4) can otherwise be damaged or malfunction.	AR42.45-P-0820-02CW
4	Unclip electrical line on bracket (1)
5	Mark Brake lines (3) for corresponding connection
6	Detach Brake lines (3) from traction system hydraulic unit (A7/3)	Seal the Brake lines (3) and connections at the traction system hydraulic unit (A7/3). Foreign objects can otherwise enter the traction system hydraulic unit (A7/3) and cause damage. : Pay attention to stress/chafe-free routing of Brake lines (3).	*BA42.10-P-1004-04L
		Set of stop plugs	Fig 3
		Box wrench bit	Fig 1
		Plug-in joint adapter	Fig 4
		Box wrench bit	Fig 2
7	Lift traction system hydraulic unit (A7/3) out of bracket (1)	: Check the rubber grommets on the bracket (1) for damage and that they are seated correctly; install new ones if necessary.
8	Unscrew Bolt (5) and remove bracket (4) from hydraulic unit traction system (A7/3)	When installing a new traction system hydraulic unit (A7/3).	*BA42.45-P-1001-01M
9	Install in the reverse order
10	Connect Star Diagnosis and perform calibration of Electronic Stability Program control unit (N30/4)	When installing a new traction system hydraulic unit (A7/3).	AD00.00-P-2000-04A
11	Bleed Brake system		AR42.10-P-0010CW

ELECTRONIC STABILITY PROGRAM (ESP)

Number	Designation			Model 172
BA42.45-P-1001-01M	Bolt, traction system hydraulic unit to bracket	M8	Nm	18
		M10	Nm	-

BRAKE LINES, BRAKE HOSES

Number	Designation			Model 172
BA42.10-P-1004-04L	Union nut, Brake line to hydraulic unit	Ø4.75	Nm	18
		Ø6	Nm	18
		Ø8	Nm	24

Fig 1: Identifying Box Wrench Bit (000 589 75 03 00)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Box Wrench Bit (140 589 00 03 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Record Plug (129 589 00 91 00)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying Adapter Coupling (001 589 00 16 00)

Courtesy of MERCEDES-BENZ USA

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