As of 2010, Audis such as the Audi Q5 use an indirect tire pressure monitoring system. This means Audis have anti-lock brake system (ABS) wheel-speed sensors which detect changes in tire rolling frequencies and air loss. This tire pressure monitoring system lets you know when the tire pressure is above or below acceptable levels. It oversees the pressure of all four tires. The driver information display in an Audi warns you of pressure loss. Although this system helps you monitor tire pressure, you still must check your tire pressure manually on a regular basis.
Look for the recommended tire pressure in your Audi manual. If you do not have your manual handy, look on the side of the tire for a tire pressure stamp, or on a sticker on the inside of the driver's side door.
Inflate your tires with 32 pounds per square inch (psi) if you cannot find the recommended tire pressure for your Audi. This represents a safe tire pressure average until you know for certain.
Let air out of your tires if you wear down the middle of tires only, rather than the sides. This pattern of wear is a sign that you have too much air in your tires. Add more air to your tires if you see tire wear on the inside and outside edges.
