Replace brake fluid

AP42.00-P-4280V

Replace brake fluid

06.03.2020

Model

171, 172, 231

Model 171 shown

01

Filling device

 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

Brake fluid notes

AH42.50-P-0001-01A

Topical note

Notes on repairs to brake system

AH42.00-P-0003-01A



Remove

1

Open engine hood and position upright.

2

Remove cover over brake fluid reservoir.

Model 231

3

Clean area around cap of brake fluid reservoir.

Assembly cleaner

*BR00.45-Z-1028-04A

4

Unscrew cap of brake fluid reservoir.

5

Pump off brake fluid from brake fluid reservoir.

6

Add new brake fluid up to max marking in brake fluid reservoir.



Brake fluids (DOT 4 plus)

BB00.40-P-0331-00A



General brake fluid

BB00.40-P-0330-01A

7

Connect filling unit (01) to brake fluid reservoir.



000 588 01 82 00 Filling unit

WS25.00-P-0016B



Brake fluids (DOT 4 plus)

BB00.40-P-0331-00A



General brake fluid

BB00.40-P-0330-01A

 Pay attention to manufacturer's operating instructions.

8

Raise vehicle.



Model 171, 172

AR00.60-P-1000V



Model 231

AR00.60-P-1000TX

9

Remove bottom engine compartment paneling.



Model 171
with code 411 (6-speed manual transmission)

AR61.20-P-1105V



Model 172 with engine 271, 274, 276
with code 411 (6-speed manual transmission)

AR61.20-P-1105W



Model 172 with engine 651
with code 411 (6-speed manual transmission)

AR94.30-P-5300W

10

Renew brake fluid.



Model 231

AR42.10-P-0010-02RK



Model 171

AR42.10-P-0010-02V



Model 172

AR42.10-P-0010-02EW

 Model 171 (except 171.473)
Model 171.473Bleed screw to brake caliper

*BA42.10-P-1002-12P

 Model 172
Model 231Bleed screw to brake caliper

*BA42.10-P-1002-12J

 Model 171Bleed screw to brake caliper

*BA42.10-P-1002-10P

 Model 172Bleed screw at brake caliper

*BA42.10-P-1003-10J

 Model 231.457/473
Model 231.465
Model 231.474
except code B07 (AMG - ceramic brake system)
Model 231.474
with code B07 (AMG - ceramic brake system)
Model 231.479
except code B07 (AMG - ceramic brake system)
Model 231.479
with code B07 (AMG - ceramic brake system)Bleed screw at brake caliper

*BA42.10-P-1005-10U

 Model 171 with transmission 711.65, 716.631/664/669
Model 172 with transmission 711.654/655/670Bleed screw to central clutch operator

*BA25.20-P-1001-01B



Install

11

Install lower engine compartment lining.



Model 171
with code 411 (6-speed manual transmission)

AR61.20-P-1105V



Model 172 with engine 271, 274, 276
with code 411 (6-speed manual transmission)Gasoline

AR61.20-P-1105W



Model 172 with engine 651
with code 411 (6-speed manual transmission)Diesel

AR94.30-P-5300W

12

Remove filling unit (01) from brake fluid reservoir.

13

Check brake system for leaks.



AR42.10-P-0100-01V

14

Correct fluid level in brake fluid reservoir.

AP42.10-P-4210V

15

Screw on brake fluid reservoir cap.

16

Install cover over brake fluid reservoir.

Model 231

17

Close hood.

 Clutch operating system

Number

Designation

Transmission 711.6 (except 711.640/641)

Transmission 716.6 all models (except in model 211)

BA25.20-P-1001-01B

Bleed screw to central clutch operator

Nm

9

9

 Front axle brake caliper

Number

Designation

Model 171

BA42.10-P-1002-10P

Bleed screw to brake caliper

Nm

14

 Rear axle brake caliper

Number

Designation

Model 172

Model 231

BA42.10-P-1002-12J

Bleed screw to brake caliper

Nm

18

18

 Rear axle brake caliper

Number

Designation

Model 171 (except 171.473)

Model 171.473

BA42.10-P-1002-12P

Bleed screw to brake caliper

Nm

14

14

 Front axle brake caliper

Number

Designation

Model 172

BA42.10-P-1003-10J

Bleed screw at brake caliper

Nm

18

 Front axle brake caliper

Number

Designation

Model 231.457/473

Model 231.465

BA42.10-P-1005-10U

Bleed screw at brake caliper

Nm

18

18

 Front axle brake caliper

Number

Designation

MODEL 231.474 except CODE B07

MODEL 231.474 with CODE B07

BA42.10-P-1005-10U

Bleed screw at brake caliper

Nm

18

18

 Front axle brake caliper

Number

Designation

MODEL 231.479 except CODEB07

MODEL 231.479 with CODE B07

BA42.10-P-1005-10U

Bleed screw at brake caliper

Nm

18

18

Repair materials

Number

Designation

Order number

BR00.45-Z-1028-04A

Assembly cleaner

A 000 986 56 01