Mercedes ML Electronic Parking Brake Problem

Sounds familiar. I had a similar electronic brake problem on my ML. The electric motor in the caliper is a likely culprit, it is integrated into the brake control unit. Did you check the wiring harness and connections to the caliper? Sometimes a corroded connector can cause these intermittent electronic issues and trigger that error

Good point about the wiring. I did a quick visual check, but didn't use a multimeter. When you had the issue, did you get any specific error codes from the brake control module? Was the error consistent, or intermittent like a loose connection could cause

Mine was consistently throwing the error, pointing directly to the caliper motor. Intermittent issues are a pain to track down. Given the consistent error and your initial diagnosis, I'd say the motor is likely the problem. To be safe, I suggest visiting a workshop to confirm. They can perform more thorough brake diagnostics

Thanks for the insight. It was exactly as suspected – electric motor in the caliper was broken. I replaced it, cleared the codes, and everything is fine. Your confirmation helped me decide to do the repair. Thanks again