Thanks for replying Scott! They all drip a bit, so I guess they're doing what they're supposed to.

Several lines have rubbed against each other and worn down quite a bit. If there's a pinhole, there would be a visible leak of fuel right - or is there suction in those lines and thus no fuel leaking?

__________________
1986 300 SDL, gray on black, #14 head, 180K miles
1982 300 CD, silver on palomino, 290K+ miles [sold]
1980 300 SD, white on palomino, 500K+ miles when retired [uncle's car - inspiration for the above]