Sealing surfaces widened for drive pinion housing cover - arrow -
WARNING: This page is about a different car, the 2004 Volkswagen R32. However, it is still accessible from the selected car via links, so may be relevant.
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Width of sealing surfaces for plastic drive pinion housing cover: dimension - a
- = 7 mm
Width of sealing surfaces for aluminum drive pinion housing cover: dimension - a
- = 5 mm