New to this forum and I hope someone has seen this:
I have an Audi A4 2003. The windows stopped working along with the cabin lights ... doors open or closed. I have checked all the fuses.

 

Probably a relay or the comfort control module. Pull up the carpet on the driver's side, under there you will find a black box, inside the box is the comfort control module. Pull the connector off and look for any condensation inside the connector or on the module itself. If there is water or corrosion present you have a water leak coming from either the sunroof or the battery (pleanum) area. Under the battery there is a drain that gets clogged and water will build up and spill into the cabin through the cabin filter chamber.
If no water is present than you need to invest in a VAG COM www.ross-tech.com and pull the fault codes.

 

Thanks!

Black box covered with water. Battery swimming in water ... really sucks.
I sucked all the water out with a wet/dry vac and dug out the box:
"Zentrale Komfortelektronik" I have to assume that means the comfort control box or something similar. I am drying it all out.
The box has a number 8E0 959 433 BB. I hope drying it out will fix it. Otherwise I have a feeling I will be ordering some parts.

Thanks again for your help and prompt response.

-Chris

 

Drying it won't fix this, the module went bye bye. You also have to remove the battery, and blow out the drain under it. Use compressed air, or a pressure washer.