How Do You Replace A Mercedes Key Battery. Chrome Key Battery Replacement Steps. Pull on the tab at the bottom of the fob.
When the cover comes off the old battery will be visible. Remove the old battery and replace with the new battery. In order to change your Chrome Key battery.
Push the small metal button on the back of the key fob and slide the back of the key fob off the casing.
Pull the removable tab and remove the key from the slot. Here you can see how to change the battery type CR2025 of the remote control fob of an Mercedes Benz a-class. Determine which type of key fob you have. Pull on the tab at the bottom of the fob.
