Torque Units of Measurement from BBB

[WillS]

I'm ready to re-mount the rear calipers on my '71 280SL. I've found throughout the BBB that it gives torque settings in either 'mkp' or 'kpm'. I haven't found conversion factors (to lb-ft or Nm) for 'mkp' anywhere by looking in the BBB or on the 'net for them.  'Mkp' doesn't appear to exist. From that same research I found that 'kpm' might be 'kilopond-meter', which converts to Newton-meters (Nm) by multiplying by 9.80665. It looks to me that when Mercedes refers to 'mpk', they might be referring to the same unit, just saying it differently for what reason I don't fathom. After converting 'mpk' (or 'kpm') to Nm, Nm can be converted to lb-ft by multiplying by 0.73756214728 (one Nm = 0.73756214728 lb-ft), which finally gets me to a torque setting my torque wrench understands (lb-ft).

So, for example, the BBB specifies the 280SL/8 rear caliper mounting bolts torque setting as '11.5 mkp' (or 'kpm'??), which converts to 83 lb-ft (11.5 x 9.80665 = 112.776; 112.776 x 0.73756214728 = 83.18 lb-ft). 83 lb-ft seems a bit high to me, for caliper bolts, but maybe not.

What say you, does this make sense, or am I all wet with this?

[WillS]

.....or alternatively, does someone know the factory rear caliper mounting bolt torque values for a 280SL?

[Tomnistuff]

Your analysis appears to be correct.  The BBB and Haynes manual call for 82 lb(force)-ft, or alternatively, 113 Nm which equals 11.52 kilopond-meters.  I found the information at the bottom of page 147 of the Haynes 230, 250 & 280 workshop manual.
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Anyway, good luck.

Tom Kizer

[Benz Dr.]

I use the same basic setting that I use for wheel bolts which is about 85 foot - lbs. It sounds like quite a bit but it really isn't.

[66andBlue]

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http://www.onlineconversion.com/
Although there are some conversions that neither of the two programs can handle.  
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http://www.brettunsvillage.com/leather/conversions.html

[WillS]

Oh jeez, I use OnLine Conversions alot, dunno why I didn't think of it this time. Thanks all for the info. Test drive of my 3.27 axle this weekend, hope it goes well.....