for the suggestions - my temporary fix has held so far, but I'll do an upgrade on the work today by cutting off the offending section of the metal line and replacing with a flexible tube held in place with hose clamps.

SD Blue: Yes they did put in new clamps when they replaced the line. It seemed however, that some sort of tool was used to tighten the metal band around the plastic piece - sort of pinching it in place. I think if the pinching had not been so tight it might have caused less stress on the plastic piece not causing it to break so easily.

If I have time, I'll also replace the other plastic inserts (I believe there are about 4 or 5 of them altogether) with rubber ones by loosening the clamps and sliding on a piece of rubber hose.

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1988 560 SEL
1984 190D 2.2 (Sold)