The only problem with looking for a used E420 is that I must have certain records showing work, which many retail dealers don't have. I am not going to pay for another evaporator replacement!

I've already started accepting the fact that I may just have to let her go.

To make sure that I get top-dollar from them for the car, what must I show in terms of records? Does it even matter if I have records?

The car WAS in pristine shape - I had even just spent $1000 on A/C hose replacement and o2 sensor (and diff. fluid change). What a waste.