How to Set Up the Horn Not Sounding When Locking a Mercedes-Benz?

[Russell]

Open the driver's side door of the Mercedes-Benz, and press the brake pedal to prepare for starting the Mercedes-Benz engine. Press the one-touch start button of the Mercedes-Benz. All the dashboard lights will illuminate, indicating that the Mercedes-Benz engine has started. Press and hold the lock button on the driver's door of the Mercedes-Benz. Do not release it immediately; continue holding for more than 3 seconds to turn it off.

[MacAlana]

I've dealt with this issue several times. The Mercedes horn beeps when locking to confirm security, but you can turn off the sound to avoid disturbing others. Sit in the car without starting the engine, and quickly press the lock button twice in succession with the key; or navigate through the central control screen to Settings > Vehicle > Door Locks > Sound Feedback to disable it. Some newer models can also deactivate this by holding the key button for a few seconds. After successful setup, the car will flash lights silently when locking, without affecting the anti-theft function. Safety reminder: Ensure a safe environment before testing operations; check the battery or manual if it doesn’t work; maintain other anti-theft measures after disabling to prevent risks due to negligence. Remember to perform regular maintenance to avoid setting conflicts.

[McPenelope]

I also encountered a similar situation and wanted to mute the car lock. Simple steps: Stand by the car with the Mercedes key, first press the lock button once to hear the horn sound, then immediately press it twice more to turn it off. Alternatively, get in the car, open the central control screen, navigate to the door lock settings in the system menu, and turn off the acoustic feedback option. I tried the key method and it worked well—just confirm with the indicator light flashing. Regular users don’t need to worry about professional tools; if you can’t find the menu, check the owner’s manual or the Mercedes app tutorial. Be quick with the operation to avoid draining the key battery. After setting, test locking the door a few times to ensure it’s silent. For security, the flashing light confirmation is enough for theft prevention.

[CadenDella]

As a Mercedes-Benz owner, I recommend disabling the lock confirmation beep through key sequence operations: Press the lock button three times consecutively when the vehicle is powered off; or access the vehicle menu via the instrument cluster settings, select Central Locking > Disable Acoustic Signal. Some owners disable it to reduce noise, which does not compromise core security. The setup is straightforward but always test afterward; if unsuccessful, consult the manual or dealership. Safety reminder: When silent locking is enabled, rely on visual confirmation for door security.