Specified Values
WARNING: This page is about a different car, the 2016 Volkswagen Beetle, 2015 Volkswagen Beetle, 2014 Volkswagen Beetle, 2013 Volkswagen Beetle, and 2012 Volkswagen Beetle. However, it is still accessible from the selected car via links, so may be relevant.
High-pressure side:
Increasing from pressure with engine not running to a maximum of 20 bar.
Low-pressure side:
Decreasing from pressure with engine not running down to 1.3 bar.