WARNING: This page is about a different car, the 2016 Audi A3 and 2015 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.
Courtesy of AUDI OF AMERICA, LLC
1 - Glow Plug with Combustion Chamber Pressure Sensor
12 Nm
2 - Glow plug without combustion chamber pressure sensor