Well i had a water leak in my trunk for about 1 year
I thought it was tailights seals or rear hatch mounting hinges maybe even Roof drain channels but everything checked and all fine

but there was still plenty of water in my trunk

guess what,it was this little hole fckin me all the time this is the gas tank filler
the water from there was going directly to my trunk so here is a solution

Here is the water drain hole


Used some petrol hose found in my garage that fit the hole


Here it is the hose attached in the hole


now the water goes straight on the wheel and no more nasty trunk