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How to Turn Off the Key Battery Message on Mercedes C-Class

Model: Mercedes Classe C W205 - Years: 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021
Part: Checks and maintenance

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Video tutorial

In this video, learn how to maintain your Mercedes. Insert the key into the ignition slot and notice the message on the instrument panel: Change Key Battery.

Take the remote key fob and remove the metal key hidden in the key case. Use the key to lift the plastic cover and access the battery.

Replace the battery with one of the same voltage and size. Close the plastic cover and insert the metal key back into the key case.

Finally, turn on the instrument panel and you will see that the message is no longer present.


Updated on 25 February 2026 by ScegliAuto


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How to Activate the Disabled TRC on the Toyota Yaris?

As the video clearly shows, disabling or activating the traction control (TRC or ESP) on the Toyota Yaris is very simple. By default, the traction system activates every time the vehicle is started. To disable it, simply press the button depicting a skidding car located in the centre of the vehicle where the controls are, such as the hazard lights and the radio, but near the handbrake. Once disabled, the TRC off light will illuminate on the dashboard. To reactivate it, just press the same button again.

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by ScegliAuto

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