How to Reset the Oil Light on a 1999 Mercedes E320

1. Insert your key and turn it to the second ("II") ignition position. Wait for the service light to appear.
2. Push the bottom button on your instrument cluster (on the left side of the cluster) twice within four seconds.
3. Turn your key all the way to the left ("Off"). Push and hold the bottom button. Turn the key back to the second ignition position.
4. Continue to hold the bottom button until the service light disappears and resets to the default ("Service in 10,000 miles").