I've noticed that each time I park my 2001 Audi A4 1.8T, water leaks from underneath the car under the passenger side, and then stops after 2 mins or so.
Do you know why?
I've been using the A/C everyday in this 95F humid weather. Could that be the cause?

 

I would think its the a/c the drain is on the left. If your still not sure smell the fluid as crazy as that sounds. If it smells like nothing and looks like water its gotta be the a/c

 

Sounds like air conditioner concensation drain. Normal.