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

[SabrinaDella]

Press the brake pedal of the Mercedes-Benz to prepare to start the engine. Press the one-touch start button of the Mercedes-Benz, and all the dashboard lights will illuminate, indicating that the engine has started. Hold down the lock button on the driver's door of the Mercedes-Benz, and do not release it immediately. Continue holding it for more than 3 seconds.

[SanManuel]

I encountered this issue when I used to drive a Mercedes-Benz. The lack of a horn sound when locking the car is indeed a bit annoying. It's not a major malfunction, usually just a setting that needs adjustment. Mercedes-Benz vehicles have a central control menu. After starting the engine, turn on the screen, find the settings icon, and navigate to the vehicle or comfort options. There should be a door lock setting where you can check for "Lock confirmation sound" or something similar, and simply turn it on. Some older models might require using the steering wheel buttons or holding down the lock button on the remote key to activate it. I always keep this feature on because it confirms that the car is locked successfully, preventing theft due to an improperly locked vehicle. If the sound still doesn't work after adjusting the settings, check if the horn fuse is blown or if the key battery is low, though these cases are rare. When handling it yourself, make sure the car is parked and turned off, and avoid tampering with the electronic system. Also, refer to the owner's manual, as the menu structure varies by model year. It should be an easy fix.

[VanRhett]

As an experienced driver, I think the reason why the Mercedes' locking horn doesn't sound is most likely due to the settings being turned off. You need to get in the car, start the engine, open the settings menu on the central control screen, select "Vehicle" or "Anti-theft System," scroll down to find an option like "Central Locking Feedback," and toggle it to the on state. Some high-end models can also be set through key combinations, such as pressing and holding the lock and unlock buttons together for a few seconds. This feature is quite useful—it provides an audible confirmation for peace of mind, especially at night or in parking lots. I make it a habit to have the technician check the settings during every maintenance visit to avoid minor issues. If it still doesn't sound, consider hardware faults like a short circuit in the horn wiring or a control module issue, but always check the settings first to avoid an unnecessary trip to the dealership. For regular maintenance, be careful not to let water seep in or make improper modifications that could affect the module. In short, try the simple methods first—they don’t take much time.

[OliveLee]

I just started driving a Mercedes recently and checked the settings when the car didn't make a sound when locking. Simply put: turn on the ignition, go to the main menu and click "Settings", find "Vehicle Settings", enter the door lock or comfort items, and see if there is an audio feedback option to turn on. Older models may use the steering wheel control buttons to adjust. Make sure the remote key is working properly and the battery is not dead. Once set up, it will beep to confirm the lock is in place. This sound is important for anti-theft, so it's recommended to check and not ignore it.