To check the mileage on your new 2022 Volvo S90, you should check the odometer display. As for maintenance, the recommended interval for a Volvo S90 is every 10,000 kilometers or one year, whichever comes first. It"s important to keep up with regular maintenance for your vehicle, including oil changes and filter replacements, to ensure long-term reliability and performance. You can also take advantage of special promotions and discounts on maintenance services offered by Volvo dealerships on platforms like Taobao, JD, and Volvo World.