I am getting ready to replace my rubber portions with clamps and hoses....what I can tell you, is that finding the correct hose is hot easy....it both has to hold the pressure plus the temp, the temp on my lower hose is 275°F....knowing what I researched in order to do my fix.....I can see why you can have an issue getting a shop to replace the rubber portion...

Oil Cooler Line Rubber Replacement..... - Mercedes-Benz Forum

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