How do you reset maintance light 2005 c240 4matic?

How to reset maintenance info after oil change on benz c240

With the key in position 1, hit the odometer reset button on the left on the cluster 3 times in a row.

The cluster should beep once.

scroll through the multifunction display with the page buttons until the display shows the onboard voltage screen. It will say something like "UB: 12.2 V" scroll threw this menu with with the up/down until you reach the "service menu" page.

scroll down to "confirmation"

press +, confirm full service with +.

Wait till it says service confirmed.

cycle the key off and then back on to position 2. Scroll to the normal service menu where it normally says how many days or miles till next service. If the service was reset correctly, it will say "service display not possible" for a few minutes while it recalculates. You must cycle the key off and back on before it will back out of the onboard diagnostic mode. If you don’t back out, the esp/abs/bas lights will illuminate when the car is started.