How To Open Mercedes Key Fob 2008. Pull the sliding tab, and pull out the valet key. Watch the following video to learn how to test if mercedes key fob is working properly.
With your key still in the car ignition, press the lock button on the key fob. This can cause the electronics inside the key to malfunction. After you remove the key, you should notice an empty slot around the bottom end of the key holder.
There are several mercedes smart key remotes so make sure to look at the correct video.
Turn the ignition on and off seven times and then click the key fob. If the key fob appears to be working, see if the remote is transmitting a signal. At this point, you can insert the blade key and turn it 180 degrees. The remote must be programmed by a qualified automotive locksmith to your vehicle's installed rke system.