One of the only bad things I have heard about the 1992 - + S-Class is the A/C woe that requires the entire dash to be removed. What exactly is this that causes the woe? - the evaporator? What happens- does it leak or.... ? What if you do not care that much about A/C? Is it something that can go unrepaired if you do not care about A/C? It gets hot here, but A/C stuffs up my nose, so I rarely use it in even in my cars with working A/C. I would just like to have it working to enhance the value of the car. I am asking because as mentioned in another thread, I am considering a 94' S420 and I am concerned about this maybe being a future problem. I may be getting overworked for nothing, as the one I am considering may have already been changed out, or perhaps I can make a deal with the seller (independent MB used dealer/repair). $4950, 1-owner car, black on black, like new, 164K, well maintained.... seems like a good deal? Lastly, what about the timing chains? How often should they be changed?

Thanks!