Symptoms to report
- The parking brake will not release or does not hold as expected.
- A parking-brake warning appears, or an actuator makes an unusual sound during operation.
Possible causes
Low supply voltage, damaged wiring, a faulty switch, actuator problems, and binding mechanical parts can affect operation. Some vehicles integrate the actuator into the rear caliper; others use a separate mechanism. Recent battery or rear-brake work can provide useful diagnostic context without proving who or what caused the issue.
How repair is planned
The complaint, system information, and physical condition guide the inspection. Applicable service-mode procedures are important when working on electronically controlled rear brakes. Repair should address the confirmed electrical or mechanical problem, followed by any specified initialization and checks of application, release, and warning status.
Safe next steps
Do not force the vehicle to move with a parking brake that remains applied. If it will not hold, park securely using safe assistance and avoid relying on the faulty mechanism. Describe any dashboard messages exactly and let D&S know whether the vehicle is currently movable before arranging the visit.