Vince explained his method of taking the upper hose off and filling the engine through the hose, but I have always just filled the tank and let it run with no cap for a while.
I like VW designs... for the most part... but having to disconnect the water pump and remove the power steering to get to a t-stat leak that you don't know if you've fixed until you bolt it all back together is nuts... as is the Dance of the Burping.
WRT to the Dance of the Burping, in case I've confused someone, my technique is to fill the *rad* with the upper hose... the idea being that it's not going to fill as easily on its own with the t-stat closed.
Having said that, many many people do just fine following the Bentley... fill it thru the coolant tank and keep adding while it runs.
Sigh. :wink: