With the ignition key off, press and hold the trip button
while doing this, turn the ignition key to the on position
The driver’s instrument panel screen will now read “service reset.”
Now press the silver knurled knob on the right side of the steering wheel controls, this will confirm the operation.
Press and hold the odometer reset button
Turn the ignition key to position 2
After 30 seconds release the odometer reset button
Turn ignition off
You may notice the display flashing or counting down.
When a service is needed based on the car’s mileage or time since the last service, the display screen on a Mercedes C230 will notify you. The display screen is located within the speedometer on the instrument panel. Mercedes mechanics will reset the Service B notification light after the service is performed. If you performed the service, you need to reset the light yourself. Service B includes an oil and filter change, a tire rotation and other maintenance checks.
Instructions
1. Insert the key into the ignition and turn it until the battery comes or the engine turns on.
2. Locate the left and right arrow buttons on the left side of your steering wheel. Press either button until the mileage is displayed on the instrument panel display screen.
3. Press the up or down button until the service symbol appears on the screen.
4. Locate the trip odometer reset button to the left of the instrument panel. Hold the reset button for a few seconds until the screen displays the message, “Do you want to reset the service interval? Confirm with the R-button.” Release the button once the phrase appears.
5. Press the reset button to reset the Service B notification.