How to set the horn sound when locking an Audi A4?

[VanMiranda]

Audi A4's method for setting the horn sound when locking the car is: use the remote key to activate the horn sound when locking the car, simultaneously press the unlock and lock buttons for 3 seconds, and the light will flash once to confirm. Taking the Audi A4 (import) 2021 Avant Pioneer 40TFSI Fashion Dynamic model as an example, it is a mid-size car launched by Audi (import), with dimensions of 4762mm in length, 1847mm in width, and 1436mm in height, and a wheelbase of 2825mm. In terms of power, the car is equipped with a 2.0T turbocharged engine, with a maximum power of 150kw and a maximum torque of 320nm, matched with a 7-speed dual-clutch transmission.

[MacCole]

I remember when I first got my car, I also wanted to set up this horn sound when locking. It took me quite a while to figure it out. The setting for the Audi A4 is indeed quite hidden. You need to first find the vehicle settings icon on the central control screen, click into it, and select the door lock option. Inside, there will be a lock confirmation option; you need to check it for the horn to sound. The location might vary slightly for different model years. My neighbor's newer model required digging one more layer into the submenu. If you can't find it, you can try using the voice command by saying 'turn on lock confirmation sound'—some models with smart systems support this feature. If there's no option at all in the infotainment system, it's likely disabled by default from the factory, and you'll have to visit the dealership to enable it using their diagnostic computer. They can get it done in just five minutes.

[Hadley]

Actually, setting the lock sound isn't too complicated, it mainly depends on your car's model year. For older A4 models, it's usually hidden in the MMI system - press the CAR button to enter settings, find the central locking menu where you'll see the sound alert toggle. For newer touchscreen versions, look in the vehicle app, select the service menu and scroll to the bottom. If you encounter special situations like the horn not sounding when long-pressing the lock button on the key fob, I recommend checking the horn relay at position 32 in the fuse box - I once had poor contact there after modifications. Also, a reminder that European versions disable this function by default to avoid disturbing others. After enabling it domestically, it's best not to use it frequently late at night in residential areas to prevent neighbor complaints.

[StLydia]

For frequent Audi modifiers, setting the lock sound is recommended in three steps: First, ensure the vehicle is powered on but not started, then locate the vehicle settings interface in the central control. Next, enter the central door lock menu, which may be labeled as external lighting or confirmation signal in different models. Finally, simply enable the sound confirmation option. Higher-end models with virtual cockpits can even customize the length of the sound effect by adjusting the beep duration in the sound settings. If this option is completely missing from the menu, it indicates that a hidden feature needs to be activated. Use an OBD tool to access the 5F module and modify the coding value by checking bit5 of byte11. However, beginners should avoid tampering with system parameters to prevent malfunctions.

[JulianaRose]

A friend asked me how to enable the horn sound when locking the car, and I said it depends on the specific model. For models before 2020, it's usually set in the MMI—rotate the knob to select Vehicle > Door Locks > Lock Confirmation Tone. For newer models with touchscreens, go directly to Settings from the home screen and tap the Vehicle and Services menu. If you still can't find it, there's a trick: press and hold both the lock and unlock buttons on the key fob for more than 6 seconds to force-activate the tone. However, note that this method doesn't work for all model years, and the setting resets to off after each vehicle restart—unlike the system settings, which are permanent. My advice: after adjusting it while using the car, take a photo of the menu path and save it on your phone for easy reference next time.

[SanHazel]

Last time when helping my cousin adjust his A4, I noticed significant differences in settings between old and new models. The classic version with physical button center console requires pressing the CAR button first, then using the rotary knob to switch to the settings tab before accessing door lock management. The smart models with connected systems are simpler - just say 'turn on lock sound' via voice command or directly access the vehicle app via touchscreen. The key point is that when enabling the 'sound confirmation' option, the screen displays that headlights need to be turned on to activate the function. If the operation fails, prioritize checking battery voltage and lighting system status - some owners have experienced ECU misjudgment due to LED light modifications. This feature effectively enhances anti-theft protection. It's recommended to test the actual effect by pulling the door after setup.