Recommended replacement interval for the part category Brake Pad Set, disc brake : 30000 km

Important!

This replacement procedure can be used for:
MERCEDES-BENZ A-Class (W169) A 150 (169.031, 169.331), MERCEDES-BENZ B-Class (W245) B 150 (245.231)

The steps may slightly vary depending on the car design.

How to change front brake discs and brake pads MERCEDES-BENZ A W169 TUTORIAL | AUTODOC

Replacement: brake pads – Mercedes W169. List of the tools you'll need:

                        Wire brush
                      
                        WD-40 spray
                      
                        Brake cleaner 
                      
                        Anti-squeal paste
                      
                        Copper grease 
                      
                        Combination spanner #17
                      
                        Drive socket # 13 
                      
                        Wheel impact socket #17
                      
                        Ratchet wrench
                      
                        Torque wrench
                      
                        Brake caliper wind back tool
                      
                        Round-nose pliers
                      
                        Crow bar
                      
                        Wheel chock

All the parts you need to replace – Brake Pads for A-Class (W169) and other MERCEDES-BENZ models

MERCEDES-BENZ A-Class (W169) A 150 (169.031, 169.331)

MERCEDES-BENZ B-Class (W245) B 150 (245.231)

Replacement: brake pads – Mercedes W169. AUTODOC experts recommend:

Perform the replacement of brake pads in complete set for each axis. This provides effective braking.
The replacement procedure is identical for all brake pads on the same axle.
Warning! Shut down the engine before starting any work – Mercedes W169.

Carry out replacement in the following order:

Step 1

Open the bonnet.Unscrew the brake fluid reservoir cap.
Step 2

Secure the wheels with chocks.
Step 3

Loosen the wheel mounting bolts.Use wheel impact socket #17.

Step 4

Raise the front of the car and secure on supports.
Step 5

Unscrew the wheel bolts.

AUTODOC recommends:

Important! Hold the wheel while unscrewing the fastening bolts. Mercedes W169
Step 6

Remove the wheel.
Step 7

Disconnect the brake pad wear sensor plug.Use round-nose pliers.

Please note!

Some cars are not equipped with the brake pad wear sensor.

Step 8

Clean the brake caliper fasteners. Use a wire brush.Use WD-40 spray.
Step 9

Spread the brake pads.Use a crowbar.
Step 10

Unscrew the brake caliper fastening.Use a combination spanner #17.Use a drive socket #13.Use a ratchet wrench.
Step 11

Remove the brake caliper.

Replacement: brake pads – Mercedes W169. Tip from AUTODOC:

Tie the caliper to the suspension or to the body with a wire without disconnecting from the brake hose to prevent depressurization of the brake system.Make sure that the brake caliper is not hanging on the brake hose.Don't press the brake pedal after the brake caliper has been removed. As a result, the piston can fall out from the brake cylinder, and brake fluid leakage and depressurization of the system may occur. Check the brake caliper bracket, brake caliper guide pins and boots. Clean them. Replace, if necessary.
Step 12

Remove the brake pads.Use a crowbar.
Step 13

Remove the brake pads retaining clips. Use a crowbar.

Replacement: brake pads – Mercedes W169. Professionals recommend:

Measure the brake disc thickness. Upon reaching the wear limit the part must be replaced.

Step 14

Clean the brake caliper bracket from dirt and dust.Use a wire brush.Use a brake cleaner.

AUTODOC recommends:

Replacement: brake pads – Mercedes W169. After applying the spray, wait a few minutes.
Step 15

Install the brake pads retaining clips. Use a crowbar.

Step 16

Treat the brake caliper piston.Use a brake cleaner.

Replacement: brake pads – Mercedes W169. AUTODOC recommends:

After applying the spray, wait a few minutes.

Step 17

Press in the brake caliper piston.Use brake caliper wind back tool.
Step 18

Treat the brake pads in the area where their surface comes into contact with the brake caliper bracket. Use anti-squeal paste.

Replacement: brake pads – Mercedes W169. Tip:

Make sure the disc surface is clean before installing the pads.
Step 19

Install new brake pads.

Replacement: brake pads – Mercedes W169. Tip from AUTODOC experts:

Make sure the pads are installed with linings facing the disc.
Step 20

Install the brake caliper and fix it.Use a drive socket #13.Use a combination spanner #17.Use a torque wrench.Tighten it to 35 Nm torque.
Step 21

Connect the brake pad wear sensor plug.Use round-nose pliers.

Step 22

Treat the surface where the brake disc contacts the wheel rim. Use copper grease.
Step 23

Clean the brake disk surface.Use a brake cleaner.

Replacement: brake pads – Mercedes W169. Tip:

After applying the spray, wait a few minutes.
Step 24

Install the wheel.

Replacement: brake pads – Mercedes W169. AUTODOC experts recommend:

To avoid injury, hold up the wheel when screwing in the fastening bolts.
Step 25

Screw in the wheel bolts.Use wheel impact socket #17.
Step 26

Lower the car and working in a cross order, tighten the wheel bolts.Use wheel impact socket #17.Use a torque wrench.Tighten it to 120 Nm torque.
Step 27

Remove the jacks and chocks.

AUTODOC recommends:

Important! Replacement: brake pads – Mercedes W169. Check the brake fluid level in the reservoir and top up if necessary.
Step 28

Tighten the brake fluid reservoir cap. Without starting the engine, press the brake pedal several times until you feel significant resistance.
Step 29

Close the hood.

Replacement: brake pads – Mercedes W169. AUTODOC recommends:

Slow down smoothly for first 150-200 km after the brake pads replacement. Avoid unneccessary and sharp braking to a stop.

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