How To Open Mercedes Key Fob For Battery. After the key releases, there will be a visible slot at the end of the key fob. Push that clip to the side and the valet key will pop out.
Make sure the new battery is facing the correct way. Press the key into the flat end of the fob to open the chrome key’s cover. Push that clip to the side and the valet key will pop out.
Determine the type of key you have.
Multiple clicks needed to unlock the doors. You should see a red led light, and this should appear whenever the lock, unlock, panic, or trunk button is pressed. For a fob with a springing key, press the spring button on the fob or pull the key forward to get it out of the way. Pull the sliding tab on the key, and pull out the key that is inside of the fob.
