Remove/Install ETS/ASR/ESP(R) Hydraulic Unit - AR42.40-P-0816S

Model 223 

Fig 1: ETS/ASR/ESP(R) Hydraulic Unit Components Location - Model 223 (Shown Except Code 200)

Courtesy of MERCEDES-BENZ USA

Shown except code 200 (Conditionally automated driving) 

Courtesy of MERCEDES-BENZ USA

Shown except code 200 (Conditionally automated driving) 

	Risk of poisoning  from swallowing brake fluid. Risk of injury  from skin and eye contact with brake fluid	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
Notice	Notes on repairs to brake system		AH42.00-P-0003-01A
Notice	Brake fluid notes		AH42.50-P-0001-01A
Notice	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Notes on safety-relevant components		AH00.00-Z-0019-01A
	Note on calculation of tightening torque when using insertion or socket tools with various effective lengths		AH00.00-P-0015-01CW
	Remove/install
1	Commission ESP® control unit (N30/3) or Electronic Stability Program control unit (N30/10).	When replacing hydraulic unit (1).
		The ESP® control unit (N30/3) or Electronic Stability Program control unit (N30/10) is part of the hydraulic unit (1).	AD00.00-P-2000-06FR
2	Switch off ignition and store transmitter key outside of transmission range (min. 2 m).
3	Remove fuse and relay module with housing in engine compartment.		AR54.15-P-0005S
	Clean
4	Clean hydraulic unit (1) in area of brake line connections.	Thoroughly clean area around connecting points before opening hydraulic system. Otherwise minute particles of dirt in the hydraulic components can result in malfunctions and total failure of the hydraulic 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.
		Assembly cleaner	*BR00.45-Z-1028-04A
5	Disconnect electrical connection (2).	It is essential to follow the work instructions for disconnecting the electrical connector (2). Otherwise the locking mechanism may be damaged. Do not touch, deform or damage contacts of electrical connector (2) and do not allow any foreign objects, soiling or fluids to enter the electrical connector (2). Otherwise the ESP® control unit (N30/3) or the Electronic Stability Program control unit (N30/10) may be damaged or malfunction.	AR42.45-P-0820-01FR
6	Mark brake lines (3) relative to corresponding connection on hydraulic unit (1).
7	Remove brake lines (3) from hydraulic unit (1).	Seal brake lines (3) and connections on hydraulic unit (1). Otherwise foreign objects can enter the hydraulic unit (1) and cause damage. Route the brake lines (3) such that they are free of tension and do not chafe against adjacent parts. Pay attention to marking.
		Retaining screw, brake line to hydraulic unit	*BA42.10-P-1001-04R
		Box wrench bit	Fig 2
		Record plug	Fig 3
8	Pull hydraulic unit (1) with ESP® control unit (N30/3) or Electronic Stability Program control unit (N30/10) upward out of elastomer bearings (4).	Make sure that the studs (5) of the holder (6) are correctly seated in the elastomer bearings (4).
	Check
9	Check elastomer bearings (4) for wear and damage.	If there is a problem, ↓ Replace elastomer bearing (4).
10	Unscrew screw (7) and remove holder (6).	When replacing hydraulic unit (1).
		Screw, ESP control unit® to Hydraulic unit bracket	*BA42.45-P-1002-01R
11	Install in the reverse order.
12	Bleed brake system.		AR42.10-P-0010S
13	Read out and delete fault memory.
			AD00.00-P-2000-06FR

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