Audi 4000CS Quattro thermostat

["If there is a will, there is a way" <sward@vaxwrk.enet.dec.com>]

        Could someone tell me where this beast is located and how hard
        it is to replace? My temp gauge barely moves when on the highway
        here in New England and I suspect that the thermostat is dying.

        This is on an 87 BTW.

        Peter