WARNING: This page is about a different car, the 2015 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
Special Tools And Workshop Equipment Required
Socket Bit XZN 10 :T10501
Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
Turbo System Tester Kit :VAG1687
with Turbo System Tester Kit - Adapter 12 :VAG1687/12