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.

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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff

For brake calipers always use Grade 10.9 bolts.

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1991 300E - 212K and rising fast...