Broken DAB

[Rst]

RST, it seens obvious that your dab receiver got wet? How that relates to a window being open I don't know!
Have you checked the condition of your tailgate drain tube?
If this is not connected to the exit hole, water can stay in the tailgate, having entered by the badge/handle and when you lift the tailgate open, water then flows to the part of the tailgate by the hinges.
This could explain how the dab reciever got wet.
If you had the repair done at a VW garage, I am sure they would have checked the condition of the drain tube, if it's not in place the issue may reoccur?

Hi

Yep it could well be that as I recently replaced the drain tube the other week after realising the end had perished.  When I did that I took the entire trim out and it didn't seem to show any sign of being wet but it could have dried.  There was a bit of rust on the left tailgate bulb holder connection too so it does seem like there has been water in there at some point.

Anyway all sorted now, just seems really odd that literally the day after leaving the window open it stopped working.

To add to the above not long after my rear speaker started leaking so had to get those replaced too!  Never rains it pours (literally in this case!).