Yes, Audi Q7 comes equipped with the auto-parking assist which aids in parking Audi's luxury SUV with ease. The system is comprised of ultrasonic sensors and a 360-degree view cam which displays the information on the Audi MMI display.
It would be difficult to give any verdict on the service cost of Audi Q7 because it depends on various factors. We would suggest you walk into the nearest service centers. You can click on the following link to see the details of the nearest service centers and selecting your city accordingly - Car Showrooms.