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How to Reset the A3 Service Light on the Mercedes-Benz C-Class

Model: Mercedes Classe C W205 - Years 2014-2021
Part: Warning light – error code

Let's look at the instructions to reset the A3 service light on the Mercedes-Benz C-Class. First, get inside the vehicle and turn on the instrument cluster; then press the two indicated buttons on the steering wheel to access the vehicle's onboard computer, as shown in the video. Navigate to the Assyst Plus option and follow the guided procedure to confirm and execute the service reset; if the A3 service light does not reset on the display, you will need to use a diagnostic tool to clear the warning directly from the engine control unit.

Updated on 9 September 2026 by ScegliAuto

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How to Open a Stuck Boot on the Peugeot 407?

On the Peugeot 407, the boot may become stuck, possibly due to a problem with the control button or the lock actuator. In such cases, you can perform an emergency opening by following the simple procedure shown in this tutorial. First, open the rear doors, then lower the seat back by operating the release lever. Next, go inside the boot, locate the lock, and manually operate it using a flathead screwdriver. The boot will then be free to open.

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