Well, ignition modules can be receptive to temperature. Everybody kept telling me they never die on benz engines of that era, but sure enough mine managed to and it did some similar stuff before it finally fried (cutting fuel at odd rev points). Although it's not cheap (about $300 used) I managed to find one at a local yard for $15. The first thing I would do, however, is set up a dummy spark plug on one of your wires and watch it while somebody cranks the engine, if it's regularly firing while you're have starting problems then you can at least set your sights on the fuel system/fuel distributor. If it's not firing, then you know your problem is ignition based and you can look toward the coil, crank sensor, cap/rotor, EZL mdule, and the relays that supply power to these parts. Checking the igniton system's spark could mean the difference between changing a cheap relay and putting out $$$ for a fuel distributor you don't even need.