The brakes on my 85 300TD have siezed up on me twice now. It happened suddenly after it had been running fine for a while. I heard a rumbling, grinding sound so I stopped. I could smell brake pad and the brake pedal got soft while I was sitting there. After I sat there a while and it cooled down the brake pedal stiffened up and I drove it very slowly home with no sounds, smells, or soft brakes. The next day I did a test run with similiar results. At first things were fine then suddenly the rumbling sound and smell. After it cooled it seemed to return to normal. Curiously, it was only one wheel that siezed, and a different one each time. Anyone else had any problems like this?