WARNING: This page is about a different car, the 2017 Volkswagen Touareg, 2016 Volkswagen Touareg, and 2015 Volkswagen Touareg. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Cylinder Numbering
Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
NOTE:
Cylinder 1 is located opposite the force producing side.