"2)Occasional "sulfur-like" smell while driving, the car will shake in idle and then proceed to die. Might be distributor cracked? But that was replaced less than 10k ago."
I've heard that this sulfur smell can be from different formulas of fuel. It does not mean you have bought cheap fuel, it just means go to another quality gas station. It may take a couple fill-ups to notice a difference.
My Dad's C220 did this.