C43 brakes question

At this point in time it could be anything, but the first thing I would suggest (easiest too) is to look at the rotor and brake pads. If that's the problem you will most likely notice a huge lip formed around the edge of the rotor, and the brake pads will be thin or probably worn down to near the metal.
In a less optimistic scenario, it could be that either there is a leak in the brake lines, or the brake master cylinder is failing, or has failed already. There could still be other possible reasons for this issue.
When i got my C43 the discs were warn and warped, and the pads were quite warn, and unevenly. It sounded a bit like what you described.
But also note that when i got new pads, new rotors, new fluid etc in the 43, compared to the feel of my 36, the first couple impressions I had were that the "new" brakes sucked. It felt like I had to press a bit until they started biting, and honestly the smoothness really threw me off. I thought they were barely grabbing, and really late too, then I realized when I glanced at the speedo just how hard I was actually braking.
It sounds like there's just warn stuff going on with this particular one, but do keep that in mind.







