To find the rear track of a 2012 Audi TT-RS, I recommend you:
* Consult the official Audi website: They often provide detailed specifications for their vehicles.
* Check an automotive website: Sites like Edmunds, Car and Driver, or Autotrader often have comprehensive information on car specs.
* Refer to a repair manual: A repair manual for your specific vehicle model will list the rear track measurement.
* Contact an Audi dealership: They will have access to the most accurate information about your vehicle.
I hope this helps you find the information you need!