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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
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
Video tutorial
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