Hi I'm a newbie to the A4 B6 Cabrio. Just purchased my first a 2003 2.4 v6 with a declared fault with the roof and a non functioning central display in the dash cluster. Having fixed the roof after discovering various disconnected micro switches and bodges I moved on to fixing the display. I used the guide here to replace the central led unit which now works a treat I discovered that the roof warning and ABS warning lights had both been filled with black silicone. Thats one way to stop the lights but why not fix the fault ? Have all these cars been tampered with or am I just unlucky ? The car came with a full audi service history and one owner from new but someone who hasn't a clue has been playing with this car.