I broke in my '13 GTI following methods outlined in the book and the Flyin Miata during my first 20 miles; however, it was not necessary for me to do this since VW already set the seals when they drove it off the assembly line.
Found a long stretch of road and while in 3rd or 4th gear did a slow deliberate throttle up to redline then immediately removed foot from gas and allowed vacuum to build, engine braked, down to 2000rpm then repeated the process over until I did around 10 to 15 miles.
I saw a few folks scratching their heads when I passed them and when they subsequently passed me while I engine braked.