Sounds to me like the glass simply came out of the mount that clamps the
glass and connects it to the regulator.

You might take the door off and push it back in there and it might be fine
for ages and ages. A zero cost fix.

It might pop out again. That's when I would start looking for adhesives to
glue that glass to the clamp.

Either way a cheap fix.

I have not been in the door of a Vanagon. However I have been in the doors
or LOTS of different cars. Maybe you will luck up and discover that the
clamp has a bolt you can use to loosen up to open the clamp, and then
tighten up to hold the glass tighter. I have seen this arrangement but I
don't remember the make of the vehicle.

You might be able to use a bit of urethane (like a glass shop uses to seal
up glass) to "glue" the clamp to the glass.

Chris M. <"Busbodger" of "TEAM SLOWPOKE">
Cookeville, Tennessee

ICQ# 5944649
scm9985@tntech.edu

'78 VW Westfalia (67 HP -> that is...67 Hamster Power)
'65 Beetle - Type IV powered
'99 CR-V AWD station wagon
'81 CB900 Custom moto-chickle
2.5 Corvair engines for my Trans-vair Conversion