BMW Repair: water in the flooring, wet dry vacuum, 1986 bmw 325e

Question
I have 1986 BMW 325e when i'm driving and press the break i can hear water splashing, then i notice that the carpet on back floor is wet.is there a way that i drain the water without bringing to the mechanic.
Thanks you very much.
Tony

Answer
Hello Tony,
First remove whatever can be removed from the wet area, clean and dry out. Sponge out or vacuum with a wet/dry vacuum the
wet floor. Let vehicle sit in the sun with windows open until
everything is dry.
But the cause of the problem has not been addressed. For this you would need a mechanic (or you can do it yourself if you feel qualified and have the time and tools).
The wetting of the rear area can be for a variety of reasons(hole in floor/drain plug missing, door seals or window glass seals/weatherstrips leaking, vapor barrier inside door trim has detached, etc.). The best way is to look for water marks(where it is leaking). Start with the bottom area of the doors, then look at the floor, then
get a garden hose and spray water into the window glass and the door's edges to test the seals.
I hope I had been of help. Tell me if you need more info.
Regards,