Ditto on that. Can't you just inspect the seals around the caliper and see if they are blown out or not? If you can hear it, that is almost indication enough it is sticking. Big ole pain if they go out too far. I know someone who did that once...a long time ago.
1994 C 280 117.5k, White (Good as new)
1997 Toyota Camry 149k Miles (Not so pretty anymore)
1990 190e 2.6 95k (Sold-Should not have)
1981 240d Stick ??? Miles...sold