Are those calipers fixed or floating type?

If floating there should be a 13?mm nut to open one side of the caliper (needs counterheld?). Then the caliper just swivels up to reveal the pads.

P.S. Use a piece of wire to hang the caliper while you work.

__________________
-Marty

1986 300E 220,000 miles+ transmission impossible
(Now waiting under a bridge in order to become one)

Reading your M103 duty cycle:
http://www.peachparts.com/shopforum/showpost.php?p=831799&postcount=13
http://www.peachparts.com/shopforum/showpost.php?p=831807&postcount=14