Remove/install Electronic Stability Program (ESP(R)) hydraulic unit

AR42.45-P-0817GQA

Remove/install Electronic Stability Program (ESP(R)) hydraulic unit

06.03.2020

Model

461

as of model year 2014

1

Electronic Stability Program (ESP®) hydraulic unit

2

Brake lines

3

Electrical connector

4

Retaining clamp

 Danger

Risk of accident when commissioning the vehicle due to a lack of braking effect when the service brake is operated for the first time after repair work.

Before starting the engine, actuate brake pedal several times until pressure is built up and maintained in the brake system.

AS42.50-Z-0002-01A

 Caution

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

Notes on repairs to brake system

AH42.00-P-0003-01A

Topical note

Brake fluid notes

AH42.50-P-0001-01A



Remove

1

Suction off brake fluid from brake fluid reservoir

2

Clean area surrounding electrical connection (3) and brake lines (2)


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

3

Release and disconnect electrical connector (3) on Electronic Stability Program (ESP®) hydraulic unit (1)

4

Mark brake lines (2) relative to corresponding connection on Electronic Stability Program (ESP®) hydraulic unit (1)

5

Detach brake lines (2) from Electronic Stability Program (ESP®) hydraulic unit (1)

6

Seal brake lines (2) and connections on Electronic Stability Program (ESP®) hydraulic unit (1)

 Record plug

*129589009100

7

Collect escaping brake fluid using a suitable container

8

Remove retaining clamp (4)

9

Remove Electronic Stability Program (ESP®) hydraulic unit (1)



Clean

10

Remove any escaped brake fluid


Rinse soiled parts immediately with water.
Otherwise, the paint may be damaged.



Check

11

Check all elastomer bearings for damage and correct seating, replace if necessary



Install

12

Install Electronic Stability Program (ESP®) hydraulic unit (1)

13

Install retaining clamp (4)

14

Mount brake lines (2) to Electronic Stability Program (ESP®) hydraulic unit (1)

 Installation: Pay attention to stress/chafe-free routing of brake lines (2).

 Installation: Pay attention to marking.

 Brake line to ABS/ESP hydraulic unit

*BA42.10-P-1004-04B

 Torque wrench

*001589722100

 Box wrench bit

*000589750300

 Adapter coupling

*001589001600

 Box wrench bit

*140589000300

15

Connect electrical connection (3) to Electronic Stability Program (ESP®) hydraulic unit (1)

16

Bleed brake system

AR42.10-P-0010GG

17

Connect diagnostic system and read out fault memory



AD00.00-P-2000-04A

18

Perform calibration on ESP® control unit with diagnostic system



Check

19

Check brake system in the area of the Electronic Stability Program (ESP®) hydraulic unit (1) for leaks

 Brake lines, brake hoses

Number

Designation

Model 461

BA42.10-P-1004-04B

Brake line to ABS/ESP hydraulic unit

Nm

16

Repair materials

Number

Designation

Order number

BR00.45-Z-1028-04A

Assembly cleaner

A 000 986 56 01