I have a water leak in my car when raining or driving wet roads. Its only on drivers side (LHD) both front and back.

 

I dont have a sunroof so that is not the issue.

 

Any clues where to look?

 

I had the car at the dealers, but they werent able to find it and said they needed to keep the car for some days to find it. 

If the dealership is unable to find it and needs the car for multiple days, how are we meant to find it via the internet?

 

Common places for water leaks are anywhere with an opening, door seals, windows, floor plugs, scuttle panels, boot seals, shark fin. There are so many possible options that unless its not the obvious one of sun roof drains blocked, youre better off leaving it at a garage to fix it or at least find it.