Hi all. I have an audi a6 55 reg. I recently had water ingressing into the vehicle due to a blocked drain. I have cleared the drain and dried the car out. I am still having issues with auto wipers and courtesy lights not working and an intermittent engine management light. Took it to my local audi approved garage who read the codes and it mentions a j519 unit. Just wondering if anyone else had had similar issues? Where will I find the unit? I'm just wanting to see if it is the water that could have caused it to fail? E.g was the unit submerged