PeachParts Mercedes-Benz Forum - Making our own vacuum diagram

I thought if we had enough imput from others we might be able to come up with the correct vacuum line drawing for the 72-73 350sl-450sl 4.5L FED. cars. I have never found the correct drawing anywheres)

crossover valves(large acorn shaped units)
One located rear of coolant pressure tank. 2 vac line on bottom, 1 electric connection. Middle line goes to base rear of trottle body intake . Other vac line goes to dist. retard diaphram on side of dist.

2 crossover valves located on fire wall.
Passenger side valve. 1 vac port on top (need imput-where does yours go?)
2 ports on bottom. (my middle port is left open,no line on it-how about yours).
Other port on bottom. Mine goes to a RED plastic line and is pluged off).(where does yours go?)
Also has an electrical connection.

Other crossover valve on fire wall.-
Port on top ( mine has small vac line 2" long and goose necks downwards and left open) How about yours?
2 ports on bottom, middle one has vac line going to a Y, bottom of Y goes to base of intake manifold straight down below.(rear of engine.)
Other bottom port. vac line connected and goes along fire wall to drivers side then connects to 2 green vac lines coming from inside of drivers side of car.

Note- my car does not seem to have the following.
No EGR valve.
No air pump.
only one vac line to dist.
No diverter valve
It seems to have a rectangular shaped blk box laying on the drivers side front fender, with 2 vac lines to it (charcoal canister I'm guessing)

Once the crossover valves are done we should start on the other vac line.

All and any imput is welcome. Thanks