No, the hose in question is rigid its entire length and is about a 1/4" diameter. The two ends are parallel to each other and maybe even welded together (like a double barrell shot gun) then they run together side by side toward the front and around the radiator and then split to form a large loop. What fluid goes in one "barrel" comes back out the other "barrel" if that makes any sense...it does appear to be a cooling loop for something...

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1991 300CE Sportline
1983 300SD TurboDiesel (Gone but not forgotten)