Car Stall problems of the 1996 Mercedes Benz E320

When I found out that my dear wife was dying from advanced kidney failure, I went out and bought a beautiful 1996 e 320 (from its original owner). However, when he decided to advertise the car, he carefully pressure-washed the engine compartment, etc. , so it would look its best. After which, he could not get the engine to fire again, so he had it towed to the local dealer, who charged him almost $800 to "dry off the spark plug wires, & replace the spark plug boots"!!! (nothing was mentioned about "cracked wiring, etc. ) I took possession of the car right after this fiasco, and never gave it a second thought until the car began to sputter and die, right in the midst of traffic, etc. ! on at least 3 other occasions, the car has simply shut off, just like turning the ignition off! the orig. Owner says it has never done this for him! so I stumbled onto the huge list of consumer complaints on the deteriorating wiring harness issues, which have not been recalled by mb. I have always held mb in highest regards, but for them to know about this, yet not fix it, is unforgivable! my wife's aid must use this car to drive her to her routine doctor appointments, and I can only say that they'd better not get hurt in this vehicle because it stalls out with them! they will have a lawsuit on their hands for sure! I only expect that such blatant faulty wiring problems should be fixed. . . No questions asked! I believe any american manufacturer would do so, and I expect mb to be held accountable to fix this horrific well-documented problem! please use whatever power you can muster, to help convince them to rectify this defect! (I no longer believe the dealer mechanic who told me that he had never heard of this car doing such a thing, and it must be a drop of condensation in the gastank"! I was instructed to "run a can of injector cleaner thru, and it should fix the stalling problem". Ha! not!!!!.