The Audi A3 TDI looks almost identical to its older brother the gas powered Audi A3. Now don’t worry if you own the new Diesel A3 or happen to have one as a demo a few things will remind you to put diesel fuel in and not regular gas. A single tail pipe in the rear, the Clean Diesel sticker in the back window and of course the fuel cap is labeled “Diesel”. Something I noticed while driving the Diesel A3 was how quiet and smooth it was, after looking under the hood I saw the insulation was very nice. The engine and drive of this vehicle are amazing and the fit and finish of the interior and exterior are second to none.