I suspect your snow screen was torn as well. My grille is closed but I lost a lot of power travelling in a snow storm. When I got to my destination and looked, the airbox was full of compacted snow and the filter was deformed upward. The snow screen had a tear in in. If the snow screen plugs, the air comes in through a somewhat hidden opening near the firewall that opens into the space below the air filter and after the snow screen. I keep a closer eye on the snow screen now.My TDI was vented. During a major snow storm I had it fill up the entire airbox with compacted snow which turned to ice and cause severe power issues! I was doing a 1500 mile trip, so I had to remove it and drive without it for a few hours. Put the filter and bottom half under the passenger side vent to melt.