Found another cool feature.

The brake discs are also equipped with a kind of wiper. Reason: In heavy rain, a water film can form on the brake disc and reduce its response. This is where the new “wiper” function comes in. At an interval of five minutes, the brakes are applied with a minimum amount of pressure to dry the discs. You do not notice this process while driving.
New Passat Launched In Germany - Over 40 New Photos And Full Specs - VWVortex

No idea if AUDM Passats got this feature, but it's clever nonetheless.