Recommended replacement interval for the part category Brake disc : 50000 km

Important!

This replacement procedure can be used for:
MERCEDES-BENZ SLK (R171) 200 Kompressor (171.442) … View more

The steps may slightly vary depending on the car design.

This video shows the replacement procedure of a similar car part on another vehicle

All the parts you need to replace – Brake Discs for SLK (R171) and other MERCEDES-BENZ models

Brake disc

Brake disc for SLK (R171) Petrol (163 hp)

Replacement: brake discs – MERCEDES-BENZ SLK (R171). List of the tools you'll need:

                        Wire brush
                      
                        Nylon cleaning brush
                      
                        WD-40 spray
                      
                        Brake cleaner 
                      
                        Copper grease 
                      
                        Torque wrench
                      
                        Drive socket # 12
                      
                        Drive socket # 18
                      
                        Torx bit T30
                      
                        Wheel impact socket #17
                      
                        Brake caliper wind back tool
                      
                        Ratchet wrench
                      
                        Tap wrench
                      
                        Impact screwdriver
                      
                        Crow bar
                      
                        Round-nose pliers
                      
                        Wheel chock

Buy tools

Replacement: brake discs – MERCEDES-BENZ SLK (R171). Tip from AUTODOC:

Replace the brake disks on the car MERCEDES-BENZ SLK (R171) in complete set for each axis. Regardless of the state of components. This will ensure even braking.
The replacement procedure is identical for both brake disks on the same axle.
When changing the brake discs, always replace the brake pads.
All work should be done with the engine stopped.

Replacement: brake discs – MERCEDES-BENZ SLK (R171). Recommended sequence of steps:

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.

Replacement: brake discs – MERCEDES-BENZ SLK (R171). Tip:
To avoid injury, hold up the wheel when unscrewing the bolts.
Step 6

Remove the wheel.
Step 7

Detach the connector of the brake pad wear sensor. Use round-nose pliers.
Step 8

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

Unscrew the brake caliper fastening. Use a drive socket #12. Use a ratchet wrench.
Step 10

Spread the brake pads. Use a crowbar.
Step 11

Remove the brake caliper.

Replacement: brake discs – MERCEDES-BENZ SLK (R171). Professionals recommend:
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.
Step 13

Clean the brake caliper bracket fasteners. Use a wire brush. Use WD-40 spray.
Step 14

Unscrew the caliper bracket fastening. Use a drive socket #18. Use a tap wrench. Use a ratchet wrench.
Step 15

Remove the caliper bracket.
Step 16

Clean the brake disc fasteners. Use a wire brush. Use WD-40 spray.
Step 17

Unscrew the brake disc fastening. Use Torx T30. Use an impact screwdriver.
Step 18

Remove the brake disc.
Step 19

Clean the hub. Use a wire brush. Treat the contacting surface. Use copper grease.
Step 20

Install the brake disc.
Step 21

Tighten the brake disc fastening. Use Torx T30. Use a torque wrench. Tighten it to 9 Nm torque.
Step 22

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

AUTODOC recommends:
Replacement: brake discs – MERCEDES-BENZ SLK (R171). After applying the spray, wait a few minutes.
Step 23

Install the brake caliper bracket.
Step 24

Tighten the brake caliper bracket. Use a drive socket #18. Use a torque wrench. Tighten it to 115 Nm torque.
Step 25

Install the brake pads.
Step 26

Treat the brake caliper piston. Use a nylon cleaning brush. Use a brake cleaner.

Replacement: brake discs – MERCEDES-BENZ SLK (R171). AUTODOC recommends:
After applying the spray, wait a few minutes.
Step 27

Press in the brake caliper piston. Use brake caliper wind back tool.
Step 28

Install the brake caliper and fix it. Use a drive socket #12. Use a torque wrench. Tighten it to 25 Nm torque.
Step 29

Attach the connector of the brake pad wear sensor.
Step 30

Treat the surface where the brake disc contacts the wheel rim. Use copper grease.
Step 31

Clean the brake disk surface. Use a brake cleaner.

AUTODOC recommends:
After applying the spray, wait a few minutes.
Step 32

Install the wheel.

Replacement: brake discs – MERCEDES-BENZ SLK (R171). Tip from AUTODOC:
To avoid injury, hold up the wheel when screwing in the fastening bolts.
Step 33

Screw in the wheel bolts. Use wheel impact socket #17.
Step 34

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 110 Nm torque.
Step 35

Remove the jacks and chocks.

AUTODOC recommends:
Important! Replacement: brake discs – MERCEDES-BENZ SLK (R171). Check the brake fluid level in the reservoir and top up if necessary.
Step 36

Tighten the brake fluid reservoir cap. Close the hood.

Replacement: brake discs – MERCEDES-BENZ SLK (R171). AUTODOC experts recommend:
Without starting the engine, press the brake pedal several times until you feel significant resistance.

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