On my 2001 A6 2.4 V6 the front brake pads worn symbol is continually lit up on the DIS.
I checked the brake pads myself back in November 2007 and compared them to some new pads I already had in case they needed replacing. There was plenty of life left in them, I would suggest not even half worn. I am satisfied that there is no need to replace them.
The light came on during a particuarly cold snap, and the freezing weather has played mischief before with the electrics at times.
I will check the pads myself again, if they need replacing of course I will replace but if they are no where near the wire to complete the circuit then I will not replace or is it not as simple as that?
If they are (or are not) to be replaced how do I re-set the DIS?