This easy to follow guide walks you through the process step by step, on how to change the battery in your 2015 Mercedes A Class key fob.

Tools Needed:

• Flat head screw driver
• CR2025 battery

Step 1: Slide this button to release the mechanical key from the fob.

Step 2: Slot your flat head screw driver into this hole (not too far) to lift up the back case on the fob.

Step 3: Flick the battery out with your screw driver.

Step 4: Slide in your new CR2025 battery – positive side facing up.

Step 5: Snap your case back on, ensuring you locate the tabs in first, slot your key back into the fob and you’re good to go!

Watch the full battery replacement video