Mercedes Benz Car Key Not Working

Remove the two 10mm nuts that secure the antenna amplifier to the frame.

Mercedes benz car key not working. One of the main reasons why your car key might not be working is simply because the car key is damaged. If your mercedes key has lost its remote function such as unlocking doors or opening the trunk the key s own internal battery may be dead or dying. Unplug the electrical connectors from the antenna amplifier. Over time keys themselves can also become worn out and you may need to order a replacement key.

Do not turn on the vehicle. However this is a grave misconception. Some owners report that their cars failed to start even after a jump start but a later trip to the dealership indicated a dead car battery. A damaged key does not always have to be broken in place.

Mercedes drivers with manual keys might also begin to encounter difficulty with the efficiency of the key s ability to start the ignition or to unlock the doors. Your keyless remote or key fob won t unlock doors. Your problem is likely that the fob can start the car but will not allow you to unlock the vehicle s doors or trunk. If you have a suv it may mounted on the liftgate.

Press a finger on the lock button of your key fob while the key is in the mercedes ignition. Your mercedes key fob has stopped working with no warning or explanation. It is on driver s side behind the rear windshield. Some models suffer from the defective key tumbler.

We have seen cars with as little as 20 000 miles where the tumbler go bad. Your key won t unlock the car and won t start the car. However if this is the case your key should still be able to start the car. While most mercedes benz cars have the smartkey some models such as the ml class slk class crossfire used a metal blade key up to 2005.

Reduced remote signal distance. Step 3 both key fobs have stopped working if neither of your key fobs unlocks or starts the car there s a good chance that the issue is the car s battery. Generally speaking when mercedes key fob is not working it s because either because the key is defective or the all activity module aam is not recognizing the key signal or it is not receiving signal due to an antenna issue. Reset your mercedes benz key by placing the key in the ignition of your vehicle while the vehicle is turned off.

The panic button and or trunk unlock features don t work. It could be the car battery. Make sure the steering wheel is not in a locked position as mentioned above.