Turn the key on and do not start the car. Hit the left and right buttons until the mileage is displayed and then hit the up and down buttons until the service light displays. Hold the reset button on the trip meter and hit it again to confirm the reset.
To reset the service indicator on 2003 Mercedes C230, turn on the ignition and scroll through the buttons on the steering wheel. Click on the next service due menu. Hold the adjustment knob on the left side of the cluster down, and hold for 5 seconds.
to repair Mercedes cars
you can reset with a programer made by snap-on tools it is called a motis programer
go to napa and buy the sensor for about $11.00.
Look in Owner's Manual or ask Google.
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