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

Model 205 

Model 213 

Model 238 

Model 253 

Shown on model 205 

Courtesy of MERCEDES-BENZ USA

Shown on model 205 

	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
Topical note	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
Topical note	Brake fluid notes		AH42.50-P-0001-01A
Topical note	Notes on repairs to brake system		AH42.00-P-0003-01A
	Notes on safety-relevant components		AH00.00-Z-0019-01A
	Remove/install
1	Carry out commissioning of ESP® control unit (N30/4).	When installing a new traction system hydraulic unit (A7/3). The Electronic Stability Program control unit (N30/4) is part of the traction system hydraulic unit (A7/3).
2	Switch off ignition and store transmitter key outside of transmission range (min. 2 m).
3.1	Remove left and right wiper arm.	Model 205
			AR82.30-P-6100LW
3.2	Remove cover above brake fluid reservoir.	Model 213, 238, 253 : Install cover only after bleeding the brake system.
4	Remove air/water duct under left and right wiper arm.	Model 205
5	Unscrew nuts (1) and place engine fuse and relay module (K40/8) with connected electric lines to one side.
	Clean
6	Clean traction system hydraulic unit (A7/3) in the area of the brake line connections.	Before opening the hydraulic system, the area surrounding the connecting points should be thoroughly cleaned. 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
7	Release and disconnect electrical connector (2) from ESP® control unit (N30/4).	It is essential to follow the work instructions for disconnecting the electrical connector (2). Otherwise the locking mechanism may be damaged. The contacts on the electrical connection (2) on the Electronic Stability Program control unit (N30/4) must not be touched, deformed or damaged, and foreign objects, soiling or fluids must not penetrate into the electrical connection (2). Otherwise, the Electronic Stability Program control unit (N30/4) may be damaged or it may malfunction.	AR42.45-P-0820-02LW
8	Mark brake lines (3) relative to the corresponding connection on the traction system hydraulic unit (A7/3).
9	Detach brake lines (3) from traction system hydraulic unit (A7/3). Note on calculation of tightening torque when using insertion or socket tools with various effective lengths	Seal brake lines (3) and connections on traction system hydraulic unit (A7/3). Otherwise the traction system hydraulic unit (A7/3) may be damaged by the entry of foreign objects.	AH00.00-P-0015-01CW
		: Route the brake lines (3) such that they are free of tension and do not chafe against adjacent parts. Pay attention to marking. Model 205, 253 Retaining screw, brake line to hydraulic unit	*BA42.10-P-1004-04O
		Model 213 except code B07 (AMG - ceramic brake system) Model 213 with code B07 (AMG - ceramic brake system) Model 238 Retaining screw, brake line to hydraulic unit	*BA42.10-P-1004-04P
		Torque wrench	Fig 3
		Record plug	Fig 6
		Box wrench bit	Fig 4
		Adapter coupling	Fig 2
		Box wrench bit	Fig 5
10	Remove traction system hydraulic unit (A7/3) with ESP® control unit (N30/4) upwards and out of elastomer bearings (4).	: Make sure that the studs (arrows) of the bracket (5) are correctly seated in the elastomer bearings (4).
	Check
11	Check elastomer bearings (4) for wear and damage.	If a problem arises ↓ Replace elastomer bearing (4).
12	Remove screw (6) and remove holder (5).	When installing a new traction system hydraulic unit (A7/3). Screw/ Bolt, bracket to traction system hydraulic unit	*BA42.45-P-1001-01M
13	Install in the reverse order.
14	Bleed brake system.	Model 205, 253	AR42.10-P-0010LW
		Model 213, 238	AR42.10-P-0010LWE
15	Read out and erase fault memory using the diagnostic system.
		Model 205, 213, 253	AD00.00-P-2000-04B
		Model 238	AD00.00-P-2000-06LWO

Number	Designation			Model 205 (except 205.086/087/286/287/386/387/486/487)	Model 205.086/087/286/287/386/387/486/487
BA42.10-P-1004-04O	Retaining screw, brake line to hydraulic unit	Ø 4.75 mm	Nm	18	18
		Ø 6.00 mm	Nm	18	18
		Ø 8.00 mm	Nm	24	24

Number	Designation			Model 253
BA42.10-P-1004-04O	Retaining screw, brake line to hydraulic unit	Ø 4.75 mm	Nm	16
		Ø 6.00 mm	Nm	16
		Ø 8.00 mm	Nm	-

Number	Designation		Model 213 except code B06/B07	Model 213 with code B06/B07
BA42.10-P-1004-04P	Retaining screw, brake line to hydraulic unit	Nm	16	16

Number	Designation		Model 238
BA42.10-P-1004-04P	Retaining screw, brake line to hydraulic unit	Nm	16

Number	Designation			Model 205	Model 213
BA42.45-P-1001-01M	Screw/ Bolt, bracket to traction system hydraulic unit	M8	Nm	18	18
		M10	Nm	27	27

Number	Designation			Model 238	Model 253
BA42.45-P-1001-01M	Screw/ Bolt, bracket to traction system hydraulic unit	M8	Nm	18	18
		M10	Nm	-	27

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