ahh man not good. I had this EXACT same problem. It drove me crazy trying to find the leak. It might be different for you (i doubt it).. but it turned out being the sunroof cassette. Overtime if you don't clean out your sunroof drain plugs they get clogged and it causes a mess. If this turns out to be your problem, and you're out of warranty like I was..get ready to pay about $2500. They have to pull off all the upper upholstery, get that sunroof cassette out and put a new one in.

If your lucky, it might be a drain plug that got knocked off..and it could be repaired for a few hundred dollars by cleaning it out and putting it back..

Goodluck.

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