These instructions apply to the Mercedes C-Class Mk4 (W205) 2014-2023. For other models, please choose your vehicle here.
Last updated:
The Mercedes C-Class (W205, 2014–2023) — saloon, estate, coupe and cabriolet — uses a pushbutton electric parking brake (EPB), not the old foot-operated pedal of the previous W204. The EPB motor lives on each rear caliper and also drives the piston, so the rear pads cannot be serviced until that motor is commanded into its service position. This is a tool-or-menu job, not a wind-it-back-by-hand job.
Here is how to put the W205 rear EPB into the brake-pad-replacement (fitting) position, retract the caliper, and exit and bed in correctly.
Which parking brake does the W205 have?
The W205 generation switched the C-Class to an electric parking brake operated by a small switch on the dashboard to the left of the wheel. There is no foot pedal and no cable lever. The parking-brake clamp is built into the rear calipers, which means the rear caliper piston is driven by an electric motor and gearbox — it does not retract by twisting or pressing it back. The W204 before it used a foot-pedal park brake with a separate drum-in-disc mechanism; do not confuse the two, because the procedure is completely different.
Put the rear EPB into the service position
The W205 has a built-in cluster routine for exactly this, and it also responds to a generic OBD EPB tool. Cluster method:
- Turn the ignition to position 1 (on, engine off). Do not press the brake or start the engine.
- Make sure all doors, the bonnet and the glovebox are shut, or the menu will not arm.
- Set the instrument display to show the total mileage (odometer).
- Press and hold the telephone/hang-up button and the OK button on the steering wheel together for about five seconds to open the service menu.
- Select Brake Pad Replacement, press OK, then OK again to move to Fitting Position. You will hear the rear EPB motors run as they retract.
With a scan tool, plug into the OBD socket, choose the rear-brake/EPB service function and run “open caliper” or “service position.” Mercedes XENTRY does the same and is the proper route if you also need to re-adapt the parking brake. After the EPB retracts, you still have to wind the hydraulic piston back with a brake-piston tool to clear the new, thicker pads.
Critical warning
Never force a true EPB piston back by hand or with a clamp. The W205 rear caliper piston rides on a motor-driven spindle; pushing it in while the EPB is still applied strips the gear set and ruins the caliper — a common and expensive mistake on this car. Always retract electronically via the cluster menu or a tool first. (By contrast, a foot-brake or cable caliper — like the older W204 — genuinely does wind back by hand. The W205 is not that type, so do not apply that method here.)
Exit service mode and bed in
Once the new pads are in and the hydraulic piston is wound home, reassemble and take the EPB out of fitting position — press OK in the menu to exit, or run the tool’s “close/calibrate” step so the brake clamps to its normal travel. With the car parked, pump the brake pedal until it firms up so the pistons seat. Cycle the EPB switch on and off a couple of times and confirm the warning clears. Then bed the new pads: six to eight moderate stops from a safe speed, building to a couple of firmer ones, avoiding one hard stop from high speed on cold pads.
Frequently Asked Questions
Does the W205 really have an on-board service mode? Yes. The phone + OK cluster menu includes Brake Pad Replacement, so you can retract the rear EPB without a scan tool. A generic OBD EPB tool works too.
My W205 menu won’t open — why? Usually a door, bonnet or glovebox is reading as open, or the display isn’t on the odometer. Ignition must be on with the engine off.
Do the front brakes need this? No. The EPB only clamps the rear axle, so the front pads are a standard hydraulic wind-back with no electronic step.
Got “Parking brake malfunction” after the swap? Exit service mode, pump the pedal firm, then cycle the EPB switch. If it persists, an EPB adaptation in XENTRY clears it.
Is the C63 AMG different? Bigger calipers and discs, but the same EPB and the same fitting-position routine.
If your C-Class logs a brake or EPB fault code during the job, you can decode it on autodtcs.com before going further.
Disclaimer: The information on this page is provided for general guidance only. Always follow your official service manual and safety precautions when working on your vehicle. We are not responsible for errors, omissions, or any damage resulting from the use of this information.
This website is an independent resource and is not affiliated with, endorsed by, or sponsored by Mercedes. All trademarks and brand names belong to their respective owners.