Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

How to Replace the Battery in the Mercedes Key

Model: Mercedes Classe A W177 - Years: 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
Part: Key

See other generations:
Video tutorial

Today, we will replace the dead battery in the Mercedes A-Class key. First, remove the metal key from the cover, and using the same key, pry from the inside out on the plastic cap. Once the cap is open, you will immediately see the dead battery that needs to be replaced with a new one of the same size and voltage.

So, remove the dead battery and insert the new one, close the cap, and put the metal key back inside.

Finally, test the key to ensure it works correctly, and your job is done.


Updated on 8 June 2026 by ScegliAuto


Related tutorials

Replace the Key Fob Battery on Mercedes A-Class
Replace the Key Fob Battery on Mercedes A-Class
Mercedes Classe A (2012-2018 / W176) Let's see how to replace the key fob battery on a Mercedes A-Class. Take the ignition key and remove the metal key. Once the metal key is removed, in…
Replacing the Battery in a Mercedes A-Class Key
Replacing the Battery in a Mercedes A-Class Key
Mercedes Classe A (2004-2012 / W169) In this video, you will see how to replace the battery in a Mercedes A-Class key (this applies to many other models from the same manufacturer as wel…
How to Replace the Key Battery in a Mercedes A-Class W176
How to Replace the Key Battery in a Mercedes A-Class W176
Mercedes Classe A (2012-2018 / W176) If you do not know how to correctly replace the small battery inside your Mercedes A-Class W176 key, just read the following guide and follow all the…

    Frequently Asked Questions

    • Classe A 2012-2018 - Why is my Mercedes A-Class W176 key not recognized? Read answer

How to reset the Service light on a 2019 Jeep Renegade?

The Service light, depicted as a yellow spanner, illuminates as scheduled to remind the driver that it is time for scheduled maintenance. This means that the set mileage has been reached, or the expected time has passed. The procedure involves turning on the instrument cluster, pressing the accelerator three times, and then turning off the ignition. After this, keep the brake pressed, turn the ignition back on, and then turn it off again. Upon the next ignition, you will notice that the light has been reset.

Watch the video!


by ScegliAuto

More videos