yeaa the wiring that connects to the sensor is probly corroded and destroyed...mine was destroyed pretty bad, but all it is, is 2 wires that connect to the brake pad sensor, its very obvious when u remove the front 2 wheels (only the fronts have them) and the wire will probly just be hanging there. You can either reroute the wires back into the sensors or short the 2 wires together and the light will go away, i went for the shorting of the wires...was alot easier and i can usually tell when my pads are low just from driving.
Your accelerating problem is not brake pad related, do you have a CEL (check engine light)? if so or even if not, take it down to autozone and get it scanned real quick to see if any codes pop out, or even better borrow or buy a vag-com
Use to have a 00 a6 2.7t, started falling apart bad, traded it in for an 07 a4 2.0t, best idea of my life. Current mods: debadged, test pipe, and air intake.