Remove the radiator cap and crossover plug.
This link should help, even though its for a DOHC I believe its the same.
http://www.reischeperformance.com/refill.html
Its a bit of a process to follow so there's a good chance its your problem.
http://www.bloomberg.com/news/articles/2015-02-23/bugatti-sells-last-veyron-ending-era-for-volkswagen-supercar
Last Veyron built. VW lost 4.6M Euros on each one, that's insane.
We have both DSG and manual and I like both for different reasons. Manual is fun and keeps my wife away from my car, but the DSG is best for maximum performance.