Remove/install ETS/ASR/ESP hydraulic unit - AR42.40-P-0816W

MODEL 172

Fig 1: Identifying ETS/ASR/ESP Hydraulic Unit Remove/Install Components

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	Figure
		Box wrench bit	Figure
		Plug-in joint adapter	Fig 5
		Box wrench bit	Fig 3
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).
8			*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