Quote Originally Posted by Hillbilly View Post
Personally I wonder at the wisdom of turning off a very hot engine and leaving it with no coolant circulating through engine and especially the turbo. Lots of people like to spool down a turbo with the oil running through it till it cools off a bit. It has been known for oil to boil if this is not done. Maybe VW have a magic formula to prevent this.
I would certainly expect German engineering to account for that. That being said, the Audi manual from my rental A4 TDI 2 years ago explicity recommended an idle period before shutdown if engine is hot, so...

Does the turbo actually stop that quickly during S/S? Or does it essentially continue to wind for what is most often the entire S/S phase?