How do you reset the oil service light on the 2003 sl500?

That can only be done by a service tech, the car is so new that it will not reset even if you disconnect the battery

**the above is incorrect.

To reset the service light, turn ignition switch to ON position with engine off. Observe speedometer display and tachometer multifunction display. When standard display appears press up or down arrow on the multifunction steering wheel until the FSS service indicator with one or two wrenches appears in speedometer display and service deadline appears in tachometer display.

Now, press the reset button between the speedometer and the tachometer for about 4 seconds or until the tachometer display shows "Do you want to reset service interval? Confirm by using the reset button" To confirm hold down the reset button again until a signal is heard. the service indicator will display the reset interval. Reset is complete.