I just replaced the front brake calipers, pads and wear sensors on my '82 300 TD. I also of course bled the brakes and flushed most of the old fluid out. When I was done I pressed the reset buttons on top of the master cylinder reservoir.

So, today when I started driving it the wear indicator light started flashing again. Now I know it's not the pads as I just finished replacing them yesterday. Here's what happens, as I start driving, the wear indicator light starts flashing slowly. As I increase speed the frequency of the flashing increases. Eventually when I get to highway speed the light is pretty much just flashing really fast. As I slow down it does the opposite.

The brakes feel fine, nice and solid. Do any of you guys have an idea what I should check?