I have a problem when there is moderate to heavy rain as the water comes off the right side of the windscreen and runs horizontally along the driver's side window - this happens even if the wipers are not switched on - I tried it - also noticed it on some other a3's I've overtaken. It doesn't happen on the passenger side ? Anyone had similar problems - it almost completely obscures the wing mirror view on the driver's side - not too safe I don't think ??

 

I have never noticed that and I live in rain country. Might you try putting RainX on your windshield and see if that affects it?

 

Speed and wind angle would also be part of the equation.

I havent had any issues.....

 

that's weird ... haven't had that problem