Sorry I'm late to this discussion but here's a thread a while back that I posted a photo of that Combo Relay. You can actually fix it if you can solder bigger looking joints. My hazard, turn signals, and intermittent wipers ALL were on the fritz due to cracked/broken solder joints. The thread has the actually pics of the joints in question.

here's the link:
94 E320 - Intermitten delay wipers

Regarding you cruise control...sounds like it maybe your Throttle Actuator. It's the wiring insulation that goes belly up like the engine wiring harness...search for it and you'll find boat loads of info on it.