Hi guys I have a 2011 a5 Cabriolet which has had issues similar to others in as much as I had water in both rear quarter panels. I dried it out cleaned all the seals and drain points. I have had no further water issues but the brake failed and the dash went blank. I had a garage look at it and they found 3 main wires had corroded and snapped off they sorted this and the car starts drives fine but they could not find why the roof won't work. They said there is power going to the unit but nothing happens. They even tried a new roof control ecu which didn't work either any advice would be appreciated.