Originally Posted by eqsharp (Post 109782)

Here are the steps to reset the service indicator for the 2006 Mercedes C230. I have a subscription to www.eautorepair.netwhich is where this information comes from. Tons of information there for this car. Very much worth the subscription price in my opinion. (This isn't a paid advertisement. Just sharing my personal opinion.) I've used this procedure myself. It works.

The Key Players:

Multifunction Display, Reset/Illumination Button, Menu Buttons (left side of steering wheel), Display Buttons (next to Menu Buttons, for moving around within the menu), +/- Buttons (on right side of steering wheel)

The Process:

1. Turn key in ignition switch to position "1".
2. Press either Menu Button repeatedly until the basic kilometer or miles display is shown on the multifunction display .
3. Press the Reset/Illumination Button 3 times.
(You'll hear an audible beep and the voltage is shown on the multifunction display.)
4. Turn key in ignition switch to position "2".
5. Press the lower Display Button.
(The Service Display appears with miles remaining/exceeded etc.)
6. Press the Reset/Illumination Button 1 time.
(The Oil Type menu appears in the multifunction display.)
7. Select the engine oil grade by pressing the +/- Buttons.
(You may have only 1 option or multiple options depending on your engine.)
8. Press the upper Display Button.
9. Press the Reset/Illumination Button for 3 seconds to confirm.
10. Press the upper Display Button to return to the Service Display menu.
11. Press the upper Menu Button to display the kilometer or miles reading.
12. Turn key in ignition switch to position "0".

Good Luck.