Been there and done that. Check to see if heated air is leaking through the
ducts into the passenger compartment. That will cause water pouring from
the rear. I discovered the symptom on a 1400 mile trip. Halfway through it,
I pulled the heater cover, bought some file cards and duct tape at a
drugstore, and taped the cards over the heater outlets that point straight
down under the dash. That got us home until I could pull the heater valve
and replace it, and replace the foam seals in the heater as well.

Jim

On Tue, Aug 28, 2012 at 8:45 PM, Michael Wildermuth <wildermuth@alum.mit.edu
> wrote:

> I have an '87 Wolfsburg Edition.
>
> Today after driving for an hour with the A/C running, water began
> dripping from a seam in the duct work just above the rear seat.  Is this
> a symptom that the condensed water is not draining properly? Should I
> look for a drainage hose that is disconnected or plugged?
>
> Any advice from an experienced hand?
>
> Michael Wildermuth
>