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How to Replace the Key Battery of a Mercedes V-Class

Model: Mercedes Classe V W447, MK 3 - Years: 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
Part: Key

Video tutorial

If the smart key of your Mercedes V-Class shows no signs of life, don't rush to replace it at a high cost; instead, follow these instructions to change the button battery inside. Often, the key malfunction is simply due to a completely dead battery.

First, locate and press the small metal button at the top of the cover to remove the physical key. Then, remove the back part of the cover and replace the old battery with a new one. Finally, reassemble the cover and insert the physical key back inside.


Updated on 19 June 2026 by ScegliAuto


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by ScegliAuto

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