[...]
Recently, I bought a '97 GTI VR6 demo with about 2K on the clock, now up to
about 5 K (miles) and have a few questions I'm hoping some of you can help
me out with:

[...]
2. Vent air stinks after using A/C

Living in Victoria BC, I haven't had to use the A/C much yet, but each time
that I have I've noticed a kindo of musty smell coming out of the vents
smells after the car has sat for a while , say overnight, and the
ventilation is on without A/C.  Has anyone else run into this?  Any fixes.
BTW, I have checked he A/C drain and it's clear.

[...]

Thanks,

Louis Marchand

Here is the TSB info that Don sent me for this problem:

Technical Bulletin Group 97           Number 97-01   Dated 10/23/97

  
Loren