Over 300,000 Volkswagen Golf Mk7 manufactured until June 2013 may have a problem with the Air Conditioner drainage hose being installed incorrectly which leads to water accumulating in the passenger foot-well. As of September 2013 only around 50 cases of this occurring have been identified.
Condensation that collects on the evaporator is normally discharged to the outside via a small hose on the firewall.
This problem also affects the Audi A3 and Seat Leon.
source: http://www.autobild.de/artikel/vw-golf-vii-skandal-im-dauertest-4362680.html