1992 SL500 no start - I bought a SL500 110k mi for dirt cheap, needing fuel distributor, running very rich, drove it home, started up every time instantly. I installed a new FD diaphragm, o-rings and cleaned up internally. All parts went back where they were originally. Piston moves freely, no leaks. Old diaphragm was really bad, many small holes, EHA doesn't leak.
Installed new cam sensor this morning as old one was cracked, then pulled apart when I tried to pull the connector off. Still, cranks for 10 seconds before it it gets on the verge of running, but will not start.
Checked both rotors and dist. caps -OK, new Bosch non resistor plugs.