Not Warming Above 50 °C (122 °F)
WARNING: This page is about a different car, the 2014 Volkswagen Touareg, 2013 Volkswagen Touareg, 2012 Volkswagen Touareg, and 2011 Volkswagen Touareg. However, it is still accessible from the selected car via links, so may be relevant.
To avoid possible risk, pressure vessel regulations specify that vessels are not to be heated to in excess of 50 °C (122 °F).