Reading this reminded me of the McGyver adventure I had when the shredding AC V-belt blew on my W126 300SD on a +98F afternoon one Summer day out on the Interstate. The shredding belt punctured the starboard spring-covered flexible transmission cooler line from the radiator, which I patched over using a bit of an old truck inner tube found behind a truckstop, held on with a small screw-clamp, which was cut using a razor blade in my tool kit.

Add a sharp knife/razor blade, and assorted screw clamps and several square inches of flexible inner-tube line. If in the boonies - a gallon of premixed coolant to refill radiator if necessary.