How to Deactivate the Mercedes-Benz Anti-Theft Protection?
2 Answers
Use the key to open any door, then wait for a few minutes, and the vehicle will stop the alarm, thus deactivating it. The method to deactivate the Mercedes-Benz anti-theft protection system is as follows: 1. When the door lock is disabled, an alarm will sound. If this happens to your car, use the key to open the driver's or passenger's door, then wait for a few minutes, and the alarm will stop. Open the engine hood and locate the alarm. Refer to the car's operation manual and then turn off the alarm. 2. Generally, under the steering wheel, find the fuse box, then remove the fuse belonging to the alarm. Before all the above methods take effect, you can disconnect the battery. 3. Install a manual switch for the anti-theft device and turn it off when not in use.
Last time when I was driving my Mercedes, I encountered the anti-theft system being locked and it took me a while to resolve it. First, check if the key battery is dead, as insufficient key battery power is the most common cause. If the spare key still works, quickly try switching to it. If that doesn’t help, try disconnecting the negative terminal of the car battery, wait for about ten minutes, and then reconnect it—this can force a system reset. However, after I disconnected the battery, the dashboard clock reset to zero, and reconfiguring it was quite a hassle. Also, carefully check if the doors, hood, and trunk locks are completely closed, as sometimes a faulty microswitch can trigger the anti-theft system. If these simple methods don’t work, the issue might be with the anti-theft control module, requiring a professional diagnostic tool to reset it. In such cases, it’s best to go directly to the 4S shop and let the technicians handle it.
