Hello, Try the diesel section. There is the same idea going on in the w123 wagon sls system. There is a diy with pics.

That 6G2 hose size sounds familiar. We repaired the hose and re-used the hose ends on 1 of our wagons awhile back. costed like 10 bucks or something for the hose and got a longer piece than the oem. piece to route it a little bit nicer but not by much. It worked out great. I think the hose we used was a little bit more rigid than the factory piece. There were small bits of plastic in the hose. I can't remember what for, but they may be not in the w126 hose... not sure. The thread is a long one but it tells you how.

I would link you to it but don't know how to paste a link yet.

I am not sure how the hose is routed on the 560... from the pump to the connection on the pass. side framerail (where it is on the wagon too). but maybe you don't need to get fishtapes and such involved. It is actually quite easy on the wagon and very rewarding repair with those re-usable fittings. Cheap too!!
Those kinds of fittings should be used everywhere the pressure constraints would allow??...I like 'em.