Stalled W124 -- alternator or wiring harness?

[ljsense]

Thanks in advance for your help on this one.

My '95 E320 Wagon suddenly stopped running and I coasted from a stop at highway speed. The battery had power, but the engine would not restart. The battery lost nearly all its power after cranking the starter a few times and running the emergency blinkers, lights and accessories for about 5-10 minutes.

For about two days before this event, the engine was running roughly. The whole car vibrated at idle and low speeds.

The wiring harness is original, but not obviously deteriorating. Is it safe to rule it out as the cause for the stalled engine? Is this an obvious case of a dead alternator or could it be the diodes or some part in the electrical delivery to the engine?

Thanks again for your help.