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Service Reset on Mercedes A-Class

Model: Mercedes Classe A W168 - Years: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
Part: Warning light – error code

See other generations:
Video tutorial

What to do when the service light appears on the A-Class? Let's see how to reset it on a Mercedes. Turn on the instrument cluster with the remote key, press the button on the left of the instrument cluster: press twice, and then on the third press, hold it down, turn off, and then turn on the instrument cluster again.

Next, find the menu with the maintenance message. The instrument cluster will display the completed maintenance; finally, double-check everything and turn off the instrument cluster.

Use the reset performed if you did not get a positive result: go through the maintenance again.


Updated on 28 March 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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