I have a front caliper thats leaking pretty slowly. The rubber is all chewed up on the inside side. What warrents a caliper not being rebuildable, the insides?

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1989 300E 144K

The piston,bore and seals will all wear under different circumstances and passage of time. There are several companies that re-manufacture with new sleeves (stainless), and pistons/seals. " White Post Restorations" is one that I have used. Not cheap but they probably still offer a lifetime warranty on their reman units. What they did for me on an XKE years ago are still problem free. If you're interested I can get a phone # or try a search.
Al

ON a 1983 300D, the only thing that would stop you from re-sealing that caliper is if the piston was damaged OR rusted.

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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 would look at getting a rebuilt. I know that some people think that rebuilts are no good but I'm 4 out of 4 from Advance auto, and they weren't that expensive. The rebuild kits I've seen cost a significant part of a rebuilt unit.

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86 560SL
With homebrew first gear start!
85 380SL
Daily Driver Project

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