Mercedes-Benz c class reset service light?

I just had the same problem,in the service book that came with the car is a section that tell how to reset the service light. it say the following

1. turn on ignition should see the standard display

2. press the arrow on steering wheel up or down until you see the service notice

3. press reset button for about three seconds / you will see message displayed / that should say "service interval resert with r button for 3 seconds"

4. to confirm, press reset button until you hear a signal.