I need to locate the starter relay for my 75 450SL, the history is contained in an earlier posting about a week or so ago on starter relays. Does anyone have the location. The Chilton manual is mostly unreadable and the relay they show as the starter relay (#4) engages with the key in the on position, and thus is the wrong one.

The starter relay is the top rear relay in the relay panel. It disconnects the air clutch while energizing the starter solenoid. The Chilton manual is almost unreadable, good thing, because it is wrong.