I talked to him, and my uncle (who has known him for thirty years), talked to him, and he's adamant that everything should be replaced not rebuilt if he is to be the one doing the job. This mechanic has worked on Mercedes for fifty years. He says the engine runs so smoothly now that you can't even hear it or detect any vibration, I mean he took it apart and rebuilt it perfectly
Anyway, another thing I didn't realize is that it's not just a brake and AC job, he wants to replace much if not all of the clutch and clutch master cylinder, and related transmission parts, and that was included in the price too.
Anyway, I am paying him the $15K and the job will be done.
After this, I will have him repaint the car as he has a body shop too, and then someone will redo the interior completely. Besides the value of the car, the car means a lot to me as it has been in our family from my father to me. It was bought brand new from Mercedes in L.A. and remained in our family ever since.
The reason it got to this point requiring such a restoration, is mostly because it was left at the first mechanic I sent it to, in Northern California, for something like nine years it sat there (inside, protected, but just sitting there), and those guys didn't know what they were doing and lost a bunch of engine parts, sensors were missing, and they left all sorts of wires disconnected - including for example the power to the AC compressor, those wires aren't even there somehow they got lost. I was referred to them by a friend who is now upset that his referral didn't work out. It wasn't entirely the shop's fault, as in, 2 of the 3 mechanics who owned the shop actually died during those nine years, and the remaining mechanic ended up selling the building and closing the business, at which point he returned the car to me in the condition that led me to decide that I wanted it restored completely. That first shop charged me almost nothing, but did less than nothing.
Then I took it to a second shop, local to me, where the guy showed me a 280SE he had restored, so I figured he knew what he was doing, but after a year, and not much money but a waste of time, I gave up on him and took the car to this third mechanic who is my uncle's old friend, and this third mechanic has charged me real money, but delivered real results, and worked on the car diligently.
I'll have more pics and updates eventually.