How to Reset a Mercedes Service Lightby David Tate
Mercedes-Benz cars have a service indicator light that will come on to tell you when it's time for an oil change. When the light comes on, you're supposed to take your vehicle in to a licensed dealer to get the oil changed, and they will reset the light for you. If you don't want to go to a dealership because you want to go some place cheaper or change your own oil, you may need to reset the light yourself. With a few simple steps you can manually reset your service indicator light.
Resetting Your Service Indicator Light
Put your key into your car's ignition and turn it to the first position. Make sure your vehicle's mileage is showing. (The referenced website has instructions for all Mercedes models. These instructions are for the Models 221 and 216.)
Press and hold the telephone button on your steering wheel. Immediately press the "OK" button and hold them both down for at least five seconds. If done correctly the shop menu will be shown on your display.
Press the "Down" button on your arrow pad until you highlight the "Assyst Plus" option. Press the "OK" button.
Press the "Down" button until you highlight "Service carried out." Press the "OK" button.
Press the "Down" button until you highlight "Service due." Press the "OK" button.
Press the "Down" button until you highlight "Full service." Press the "OK" button. This should reset your service indicator light.
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