Hello there, When I first got my 2001 Avensis I noticed a similar phenomenon. After a long journey with the air-con on, I parked up outside my house. Minutes later I noticed a liquid dribbling from the same location you describe. On checking the fluid levels, they were all ok so it wasn't a leak. It was just water, condensation I think, dribbling off the condenser, or whatever it's called , used by the air-con unit. Of course I may be wrong, but I think it is just normal and I didn't worry about it. Like the air-con, which is just a big fridge, a kitchen fridge produces water too, which you never see as it quickly evaporates from the back. Hope this helps, Graham.