Cross-Reference Part numbers.
 

Here are a few cross reference Mercedes-Benz part numbers should anyone be in a bind.
Especially useful on the Canadian side since all of these were in stock at the warehouse. Hope it helps.
All of these were an exact match to what came off the car.
Feel free to add to the list.

112-476-12-26-11mm Nylon Braided fuel tank to Fuel pump hose. Sold by the Meter, around $20CAD
N071803008101- Threaded 8mm ball pin, Ideal for replacing worn out ball pins on a Carburetor linkage.
000-991-90-22-8mm Ball Socket end(left hand thread)- $5.33CAD
000-993-04-61-8mm Ball Socket end(right hand thread)-$9.54CAD

Lelix... I'll be the first to say: very nice of you to post cross-ref info. But Pelicans are more interested in P-stuff.

Judging by the amount of "advice" I've read to go ahead and replace that supply hose with a 1/2" hose from NAPA and just snug it tight despite being too large of an ID, I think a source for a locally available Cohline hose is a good thing to keep in mind.
The ball linkage sockets and the threaded pin are identical down to the markings.
;)

I ordered a metre of the Cohline hose from the Porsche dealer - it too was around $20. I have most of it left over if anyone local needs a piece