These instructions apply to the Mercedes C-Class Mk5 (W206) 2021-Present. For other models, please choose your vehicle here.
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The Mercedes C-Class (W206, 2021–Present) uses a fully electric parking brake (EPB) with the clamp motor integrated into each rear caliper. As with the W205 before it, that motor drives the rear piston, so the pads cannot be changed until the EPB is electronically retracted to its service position. There is no foot pedal and no hand lever to fall back on.
This guide covers putting the W206 rear EPB into the brake-pad-replacement (fitting) position, retracting the caliper safely, and exiting and bedding in.
Which parking brake does the W206 have?
The W206 carries the modern pushbutton EPB throughout the range, including the C300 and the plug-in hybrids. The switch is on the dashboard near the steering column. The rear calipers contain the motor-driven parking-brake spindle, so the piston is not a hand-wind-back item. On the W206 the workshop routines are reached through the MBUX display and steering-wheel controls rather than a simple twin-needle cluster, but the logic is the same: command the EPB open before you disturb the pads.
Put the rear EPB into the service position
On this generation the cleanest route is a diagnostic tool, with the on-board service display as a backup where the menu is present:
- Switch the ignition on (engine off). Keep all doors, the bonnet and the glovebox closed.
- Plug a generic OBD EPB tool (or Mercedes XENTRY) into the port under the dash on the driver’s side.
- Select the W206 rear-brake / EPB function and run “service mode” / “open caliper for pad replacement.” The rear EPB motors run and the spindles retract.
- If you are using the on-board route instead, set the display to the odometer, then hold the telephone/hang-up and OK buttons together for about five seconds to open the workshop menu and select Brake Pad Replacement → Fitting Position.
- With the EPB retracted, wind the hydraulic piston back with a piston tool to make room for the thicker new pads.
XENTRY is the manufacturer route and lets you re-adapt the parking brake afterwards, which is worth doing on a newer car that watches travel closely. A good generic OBD EPB tool handles the open/close cycle for a normal pad change.
Critical warning
Never force a true EPB piston back by hand or with a G-clamp. The W206 rear piston sits on a motor-driven threaded spindle; shoving it in while the brake is applied shears the gears and writes off the caliper. Always retract it electronically with a tool or the on-board service routine first. (A foot-brake or cable caliper does wind back by hand — but the W206 has neither, so never use that method here.)
Exit service mode and bed in
Fit the new pads, wind the hydraulic piston home and reassemble. Then take the EPB out of service mode with the tool’s “close/calibrate” step (or exit the on-board menu) so it clamps back to normal travel; on XENTRY follow with a parking-brake adaptation. With the car stationary, pump the brake pedal until firm so the pistons seat, then cycle the EPB switch a couple of times and confirm no warning remains. Bed the pads in with six to eight moderate stops from a safe speed, building to a few firmer ones, and avoid a single hard high-speed stop on cold pads.
Frequently Asked Questions
Can I do the W206 rear pads with just a generic tool? Yes. A generic OBD EPB tool that supports Mercedes can put the rear caliper into service mode and close it again. XENTRY adds the adaptation step.
Does the W206 have the phone + OK cluster menu like the W205? The workshop display is reached the same way on many builds, but the MBUX layout varies by software level; if the menu doesn’t appear, use an OBD EPB tool.
Do the front pads need the EPB step? No. The EPB is rear-axle only, so the fronts are a standard hydraulic wind-back.
I got a parking-brake warning after the swap. Make sure you took the EPB out of service mode, pump the pedal firm and cycle the switch. A XENTRY EPB adaptation clears a stubborn one.
Is the plug-in hybrid C300e different? The brake job itself is the same; just keep the 12 V system healthy so the EPB has enough voltage to cycle.
If the W206 stores a brake or EPB code while you work, you can look it up on autodtcs.com to confirm what it points to.
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.
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