Does that apply to a 2004?

No it did not. For some reason I had 2008 in my head . I edited it for the 2004 S80.

286 and 305mm use the same exact pads and calipers. If you have 305mm it might look like the pads are a little undersized. The larger rotor provides more thermal mass: in a given braking situation the rotor will take a little longer to heat up, thus a little longer before brake fade sets in. Also, w...

Have the battery bench tested. I'm getting the impression one cell is dead or it is not taking a charge.