Hi,
What you must look for are the 4 lines of weights (kg) on the plate/sticker inside the front door, the first is the GVW & the second the GTW. I have confirmed that on an "AUDI A3 (A5) S3 QUATTRO 3 DOOR HATCHBACK 1984cc (2013) PETROL" there is no train weight listed on this plate, only a line...