Why won t my mercedes key lock my car?
Your Mercedes Benz receives the Lock or Unlock signal from antennas installed on the car, so a bad antenna module fuse can cause your key to be unable to unlock doors. If you find a blown fuse, replace it (using the Ampere rating recommended by the manufacturer.
How do you unlock a Mercedes C class?
Insert the key and turn it to the “ON” position, then press and release the lock button on the key. Press and hold the remote’s unlock button. In 1-2 seconds, press the remote’s lock button five times in a row while holding the unlock button.
Why is my Mercedes C class key not working?
The main symptoms are the key won’t unlock the doors or start the car. You may see a blinking red light when you press a button. Insert the key and turn it to the “ON” position, then press and release the lock button on the key. Press and hold the remote’s unlock button.
Why is the panic button on my Mercedes not working?
The panic button and/or trunk unlock features don’t work. Your problem is likely that the fob can start the car but will not allow you to unlock the vehicle’s doors or trunk. In other words, it will not allow you to use the fob as a keyless entry remote. Here are some common reasons for this issue: 1. The key is defective.
What to do if your Mercedes Benz key fob is not working?
1. Put the key in the ignition. 2. Quickly remove it within 10 seconds and hold down the Lock button. 3. While holding the Lock button, press Unlock five times. 4. Release these buttons and press the Trunk button once.
Why is my Mercedes-Benz C240 key not turning?
What are common reasons my Mercedes-Benz C240 key won’t turn? While there are a variety of reasons your Mercedes-Benz C240 key won’t turn, the most common 3 are a binding steering column/lock, an ignition switch issue, or a problem with the ignition key.
The panic button and/or trunk unlock features don’t work. Your problem is likely that the fob can start the car but will not allow you to unlock the vehicle’s doors or trunk. In other words, it will not allow you to use the fob as a keyless entry remote. Here are some common reasons for this issue: 1. The key is defective.
What should I do if my Mercedes key fob is not working?
If you need a replacement battery note that Mercedes-Benz uses CR2025 battery type. Ensure you have new batteries in your key fob. Next, look carefully at your Mercedes-Benz key. When you press the button on your key you should see a small RED led light. The light should light up every time you press any of the buttons (Lock, Unlock, Panic, Trunk).
What does the fob remote on a Mercedes Benz do?
The newer keys have a transponder integrated in them. The key fob remote serves two purposes. First it disables the anti-theft system when you unlock the car. Second, Drive Authorization System verifies the key to make sure it is the right key to start the car.