I have a warning light and audible tone when starting the engine. Parking brake failure shows, the parking brake button also constantly flashes. when the parking brake button is pushed i can hear the motors running and a very loud clicking noise coming from the front of the car. i jacked the car up and applied the parking brake, they are not holding the back wheels at all. also noticed my inner rear pads are very low, would this have anything to do with it? Im handy with my tools but i dont have any vagcom/diagnostic and its really annoying for me not even being able to change the rear pads! Is my only option to buy vagcom or is there something else i can try first? thanks!!