radio help
 

hello everyone i am new to audi forum and i just purchased a 1998 a4 quattro. The stereo is the bose delta cassete verison. the screen isnt working any more and the previous owner set the speakers to be louder in the rear than the front. please help if can with detailed instructions because my screen is broken. hahah. oh and audi forums is awesome save me a few times already...:)