Smaller Wheel Options for 2011 Passat B7

I posted this question originally under the model section but maybe it would be better here...

Does anyone know the PCD, Offset etc. of the 17" alloys (mine is a 2011 Passat B7 SE estate) and if wheels from older or other VAG models would fit?
Specifically I'm looking to get some 16" or even 15" wheels set up with winter tyres in anticipation of another slippery season.
I'm wondering if 15" might actually clash with the brake calipers or ABS cables etc?
I'm assuming 16" will be fine as some models have them as standard.
Any info appreciated.