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How to Reset the Onboard Computer

Model: Mercedes Classe C W203 - Years: 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
Part: Warning light – error code

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Cars equipped with high comfort features have onboard computers that indicate all necessary maintenance and any onboard failures. In some cases, it may be necessary to reset the onboard computer.

The onboard computer is a precise and sophisticated tool that signals various operations that need to be performed. However, whenever certain operations are carried out, it is necessary to replace the sensors if needed and reset the computer so that it can signal new operations when required.

If you prefer to do it yourself instead of going to authorized shops, you will need to: turn on the ignition, press the trip odometer reset button, select the function to reset using the high beam switch, and press the button on the lights until the word "reset" appears.


Updated on 14 February 2026 by ScegliAuto


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