Mercedes-Benz R350 door unlock/lock noise persists for one minute before shutting off on Mercedes-Benz R350

Some Mercedes-Benz R350 owners report experiencing a persistent noise related to the door unlock/lock mechanism that lasts for about one minute before stopping. This issue may stem from a faulty actuator motor in the door latch/lock module, which can produce unusual sounds during operation. Additionally, a weak or depleted key fob battery could prevent effective signal transmission, causing the system to repeatedly attempt to lock or unlock the doors, resulting in noise. Some owners also report mechanical lock problems, which may arise from wear and tear or misalignment, leading to struggles in the locking mechanism. It is advisable for owners to have the door lock system inspected by a qualified mechanic or certified Mercedes-Benz technician to diagnose and resolve the issue promptly, as regular maintenance can help prevent these problems in the future.