The coolant expansion tank was cracked in several places, and they are difficult to find.


Fortunately my roommate had a spare that was in better condition, though it had some cracks which I covered with epoxy. I replaced the O-ring for the coolant level sensor. The connector was glued to it from years of coolant leakage and corrosion, so it required cleaning.


I realized there is a grommet into which the bottom of the tank rests, and I didn't order one. But, it turns out the grommet on the top of the oil filter this car uses worked perfectly.


What a goofy lower radiator hose! The OM603 is a bizarre engine.


My roommate ordered a new German-made Elaplast brand upper radiator hose, but received a ÜRO brand instead. We tried using a Gates hose, but it was too narrow in diameter and way too long. So, we used the ÜRO hose, but it was also too long and needed to be cut down on both ends. The diameter was correct, though.

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DON'T MESS WITH MY MERCEDES!


1967 W110 Universal Wagon, Euro, Turbo Diesel, Tail Fins, 4 Speed Manual Column Shift, A/C
1980 W116 300SD Turbo Diesel, DB479 Walnut Brown, Sunroof, Highly Optioned, 350,000+ Miles