How To Change The Key Fob Battery In A Mercedes. Determine Your Key Type. Signs a Mercedes-Benz Key Fob Battery May Need Replacement.

Get the Right Batteries. Insert the key into the ignition pot and turn it ON. Replacing a Chrome SmartKey Mercedes-Benz Key Fob Battery To replace the battery in a newer key fob pull the tab at the bottom.
First you need to identify which key you have.
Time to replace the key fob battery in your Mercedes. Now remove the key fob cover by pushing the key into the narrow end of the slot and remove the battery. Slide the service parking key to the other side where it can be fully inserted then press it in. The battery within the Mercedes-Benz key fob will need to be replaced every now and then.

