Using Different Style Caliper Bolt on 560SL
 

Car is 1987 560SL. Proper caliper bolts for the front are 10MM Hex socket style, part number A 107 421 00 71. I'm installing rebuilt calipers and would like to use a conventional hex head bolt rather than the hex socket bolt. I've been told part number A 123 421 02 71 will work--it is used on the 560 series 126 chassis model. The 10mm hex socket bolts are a pain--I broke 2 hex bit sockets getting the old bolts out. Maybe i should just invest in a better quality hex bit socket. Seems to me the conventional hex head bolt (Mercedes spec, with blue loc-tite) is preferable. Anybody know for sure if this works OK? Thks for any advice. John Downey

As long as the legnth of thread, shoulder, and grade are the same you should be fine.

For brake calipers always use Grade 10.9 bolts.