My oil cooler hoses are fine w/ no leaks since I posted my repair w/ AC barrier hose and crimp ferrules, maybe 5 years ago (search). Another approach is Oeticker stepless ear clamps, which are nice if you must work w/ part on the car where you can't work the crimper in. I have replaced AC parts that way. But to cut the thick ferrules off the OE M-B cooler tubes, you almost certainly must remove them from the car, which requires jacking up the engine to remove the L motor mount.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans