The w126 gasser fan and clutches fit the om617 and clear everything if you want a cooling upgrade for hot climates but may take a toll on mileage. It's hot here in texas so the roaring fan doesn't bother me with cold a/c in my face when its 110 outside and my temp gauge is at 80!

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83 300CD- sanden, dual p/f condensers, 160a alternator, ect
91 300TD- 722.6, #22 head, 3.5L IP, w140 manifolds, ect