i have a 2000 S4 6spd, and my front passenger side speaker is making crackling noises now, its been getting increasingly worse i just kept putting it off. where can i get the replacement speaker? its the some on the bottom of the passenger door. also, my ignition switch in the steering colom is getting worn out, when all the way in the off position and the key out, it thinks the key is still in and wont allow me to lock the doors with the key fob, only by incerting the key manualy. i can put the key in jiggle it around and turn to off again and it makes the conection and doest beep at me any more, but every once and a while it does this, what part is it?