I have a 99 GS 300 with about 150,000 miles on it. Several months ago, I noticed that when I took out the rear floor mat on the driver's side to clean it, the carpet was really wet. Just recently I took out the mat again to clean it & again the carpet is wet. I dried it quite well using a wet vac & towels. Last night it rained & thia morning again the floor is soaked. Any suggestions as to find where the leak is?
Thanks