How many miles are left until the next service. As the original estimated intervals were a bit, ah, wrong and led to ruined engines and a class action lawsuit hopefully the current owner isn't using it for oil change timing. Verify this before purchasing.

Most people ignore it and change the oil every 5k - 7.5k miles (if using proper synthetics and OEM filter). They'll reset it whenever it comes up. Instructions on resetting it are in the owner's manual. There's key dance/button push sequence.