Update: I replaced the leaking hard fuel line ... looks like it's still weeping a tiny bit (ugggghhhh). BUT, I was able to take it for a short drive. It drives great and the idle is night-and-day from what it was with the original injectors. It actually feels weird to sit in this car without being rocked out of my seat! I really hope this keeps up when I get it out for a full drive.
240DJan29 - YouTube

Next up: Fix the leaks. New tires. Renew registration (was hoping to get it in there before it expires the 31st but not quite going to be able to dodge that $10 late fee).

Edit: It wasn't the return line leaking, but that hard line as well. So two hard lines leaking, one of which I replaced with another and still leaks. Great.

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1987 300D, arctic white/palomino--314,000 miles
1978 240D 4-speed, Euro Delivery, light ivory/bamboo--370,000 miles
2005 Jeep Liberty CRD Limited, light khaki/slate--140,000 miles
2018 Chevy Cruze diesel, 6-speed manual, satin steel metallic/kalahari--19,000 miles
1982 Peugeot 505 diesel, 4-speed manual, blue/blue, 130,000 miles
1995 S320, black/parchment--34,000 miles (Dad's car)