I know the WK2s had issues with ac drains and sunroofs in past causing water to build up underneath the vehicle and creating sloshing...
(see Sloshing sound from under the car
But I'm hearing sloshing on my '14. At times I hear it in the dash (near brake fluid reservoir, if i took a guess) and at times it almost sounds like its in the door or just below the drivers seat.
I'm going to have dealer look at it in the next two weeks, but just curious if others are having issues too.
Potentially related, and I see that someone else posted their Summit had window seal issues, i did notice that the seals on the rear D-side door were not installed properly. I fixed above the door body but have not removed the door body to get to the remainder of the seal. Looks like it was poorly installed all the way down.