well, if you're dragging a caliper, it doesn't necessarily mean it's completely seized...just that it's not relaxing when you step off of the brake pedal...something is preventing the caliper from backing the pad off of the rotor.
you said that the car brakes normally...do you find that it's handling any differently at all?
be it a dragging caliper, a siezed caliper or a spun bearing, I should think that you'd notice different handling traits while driving.
it's a place to start, at least.
'94 W124.036 249/040 leder; 8.25x17 EvoIIs
'93 W124.036 199/040 leder; 8.25x17 EvoIIs, up in flames...LITERALLY!
'93 W124.036 481/040 leder; euro delivery; 8.25x17 EvoIIs
'88 R107.048 441/409 leder; Euro lights
'87 W201.034 199/040 leder; Euro lights; EvoII brakes; 8x16 EvoIs - soon: 500E rear brakes
'70 R113.044 050/526; factory alloys; Euro lights