I wasn't aware the old posts were not available, are you sure on that?
As for the leaks, a diagram might be nice but I think with a littl poking and prodding you should be able to find whats leaking.
The small rigid lines are vacuum lines. They attach to various points with rubber elbows, you may have fun trying to find where that loose one goes, if you aren't familiar with the OM603 engine, but if its the leak that you are looking for don't worry about the vac line until you fix the fuel leak.

There are a couple of larger plastic lines that that carry fuel but they seldom break, they are clear when new but get yellowed or dark with age, these do carry fuel so if one cracked it would spew a LOT of fuel. BTW these are factory items, with a banjo bolt at each end. Look around the filters (primary and secondary) to see if they are leaking.

The fuel leaks you have may be (and hopefully are) coming from a injector fuel return hose, these are cloth covered and small diameter (3.2mm?), less than the OD of a pencil, and they run from one injector to another and down to the filter housing. There is I believe a plug at the last injector that may have blown off (It happened to me once) lastly there is a fuel heater that might have started leaking or blown a hose. Just run the engine at idle and look for where fuel is coming. I drove a 300TD about 50 miles with a fuel plug missing (fogged out anyone who tried to follow on my tail!) and it really stunk to high heaven.
You may be able to drive to a shop but hopefully you will spot the leak and be able to fix it on your own.

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'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!