I wasn't able to find a conclusive answer on which lounge guests on UA C Class are supposed to use in ZRH at departure. Now I know the flight leaves from Dock E and the lounge closest is the Panorama Lounge but according to the website of the lounge United is not listed as an airline where access is granted.
http://www.panoramalounge.ch/#1003003
Aren't the LX Lounges all the way in Dock A?