Wagon or sedan? 4motion automatic V6 is about the heaviest you can get...
my fwd 1.8t sedan only weighs 3000 pounds with about 1/4 of a tank..that was at a local autocross event
4motion alone easily adds 300-400 pounds.. you got two extra axles, an extra differential, a driveshaft... plus automatics are always heavier than their manual counterparts.. probably by 100 pounds
and the V6 engine is a bit heavier than the 4 cylinder.. not sure by how much, but not as significant
also, with the GLX you got power/heated seats which are always suuuuper heavy... those are the big things I can think of off the top of my head..
do you have manual hvac or climatronic? climatronic probably adds a bit of weight, too.
Passat's are definitely the "curviest" of the VW family. You can even just feel it when you open the door...it's solid...then try opening/closing a door of a civic or camry.