coolant leaking on 1999 Audi A4 Quattro

my coolant light has been coming on the computer and i notice i have coolant leaking from underneath on the passenger side. i been filing it up and it leaks out. i put a liquid plug fluid in there and most of it came out. what could this be?

Asked by for the 1999 Audi A4 Quattro
the "liquid plug" stuff will probably cause more trouble than it solves in this car. find and fix the leak then flush the system to get that stuff out.
1 more answer , 1 more comment
There are several hoses and other parts of the cooling system that can leak, so you'll need to locate the source of the leak or have someone do it for you.
Totally agree with "some guy", don't use that stuff, I should've mentioned that. Thanks guy!