How to Reset the Maintenance Light in a Mercedes


1. Turn the key in the ignition to first position, which is the position before your vehicle's engine turns over. You will know you are there when you can see the Mercedes' odometer reading on the control panel.
2. Locate the telephone button on the vehicle's steering wheel. Press and hold this button, then press the 'OK' button, holding both buttons down for a minimum of five seconds. The 'shop menu' will appear on the screen above the steering wheel.
3. Press the down arrow and highlight 'Assist Plus.' When you have done this, press the button that says 'OK' on the steering wheel.
4. Press the down arrow again and highlight 'Service Carried Out' and press 'OK.' Then press the down arrow until it highlights 'Service Due' and press 'OK' again. Finally, press the down arrow one last time and highlight 'Full Service' and press 'OK.' The maintenance light should now be off.