I'm sure they use standard tuner lugs like most aftermarket wheels. most of the ftermarket wheels on vw's aren't ball seat anymore. They usually swap to standard taper seats. Only problem might be whether they're 14 or 12 mm holes.
However they will be anything but easy to fit on a Subaru especially a wagon. Stretched tires, lots of camber and heavily pulled fenders will be the only way you get them close to fitting.