1973 280SEL 4.5 drive belt routing
 

Does anyone have a drive belt routing diagram for a 1973 280SEL 4.5 or know where I can find one? The Chilton Manual for 1968-1973 MBZ does not have this information. The 1974-1984 Chilton Manual has a V8 diagram, but it does not match. (Engineering must have updated routing during the 73-74 year.)

The engine is a 117.984. If anything, could someone please tell me where I might find one? This would be greatly appreciated.

I can probably figure it out, but it would be nice to have a reference.