My back window brake lights comes on when I turn my headlights on, but the light will still get brighter while pushing the brakes. Does any one have a solution to this problem..I have 1999 Audi A4 Quattro.......................

 

you have a bad/rusty ground window brake light

 

Could you explain that a little better.

 

there are two wires from the window break light one to live and other to ground (clean the ground wire to ensure a good connection and the same with any other grounding points

 

You may also have an incorrect bulb or blown bulb. Sometimes the filament in the dual filament bulbs will fall on to the other filament causing a short to that circuit. Can cause weird stuff like that to happen.