The 560 calipers I see are floating caliper like they were on my 500sec. I doubt they will work but I thought it wouldn't hurt to ask. It seems possible.

I am aware that the rotors on the two models are different sizes. The rotors on the 500 were the same diameter as on my 123s.

Tom W

__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

All of the W126 calipers from 1986 are fixed 2 piston variety.

Yes, they will fit a W123, you will need 15" or larger wheels & either eliminate the backing plates OR use the ones from the later W126.

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MERCEDES Benz Master Guild Technician (6 TIMES)
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Mercedes Benz Star Technician (2 times)
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27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

Oh, thanks.

I don't want to go to 15" wheels on my street car but I might on the autocrosser sometime. Do I have to use the larger diameter disc too?

Tom W

__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

Yes.

IF you want very good brakes that don't require the 15's then use the 1984-85 brakes from a 500SEL or 380SE.

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

I don't know if it helps any, but the early model 300SD cars have a fixed two piston setup mounted under 14" wheels.

I'm not sure how they compare with the brakes on a 560, but I noticed the difference between the systems when I first pulled a wheel off of my 500SEC to check the brakes out.

If you want, I can measure them for you.

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-Josh
Testing the cheap Mercedes axiom, one bolt at a time...