Key Fob Won T Unlock Car Door

While less likely this is still something to keep in mind if after fixing your key or getting a new one your remote key still won t unlock car door.

Key fob won t unlock car door. A key fob is a nice convenience but it s frustrating when the remote key won t unlock car door. Try the lock button trunk release button or panic button. Verify that the remote is actually bad by using a backup remote. If your key is working but the button suddenly stops locking and unlocking the door here is a quick fix.

If the spare does not function the error is at the vehicle maybe not the fob. The key fob itself could be defective or have a bad unlock button. Because your mb receives the lock unlock signal via the antennas installed on your car a bad antenna module fuse can also cause mercedes key fob to stop working. If you find a blown fuse replace it.

If your car key is not working when you attempt to unlock your car there is a possibility that the lock itself is damaged. In some rarer cases there may be an issue with the locks on your car doors like maybe the actuator. If you have any car related problems or questions yo. Using a spare key fob can be the best way to test whether the problem lies in the key or in the vehicle.

A dead key fob means you re locked out of the car which is the last thing anyone would want when in a hurry. If it works you want to replace another key fob with a brand new one. If it unlocks the door the problem may be a weak battery in the key fob or a problem in the keyless entry antenna or wiring. If you drive a fairly modern car there is less of chance that you will have to deal with this which is mostly attributed to the presence of key fobs and keyless entry remotes.

If the other buttons work the problem is a bad unlock button. A smart fob can stop working for several reasons and diagnosing them is quite simple. In case you ve got a spare remote entry key fob or clever fob consider using that fob to unlock the doorway. Here are the five things you ll want to check first when your remote stops locking or unlocking your car doors.

Depending on the mb class this fuse can be found in one of the fuse boxes located in the engine bay side of dashboard under rear seat or trunk.