1. Don't press brake pedal, but push start button once (or turn key to first position).
2. Scroll center display to show mileage (trip and total miles).
3. Press and hold Call button on right steering wheel.
Quickly press and hold OK button on left steering wheel.
Hold both buttons until graphic appears.
4. Scroll down to Assist Plus.
5. Scroll to Full Service.
6. Scroll to Confirm
7. Select Oil Grade.
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