I just want to second georgie's comments regarding Hatch and Sons.
Bought my E420 from them and couldn't be happier. It really is the nicest driving W124 420 that I've ever driven.
Hatch is pretty far for me but their work has been the best I've seen.
look for Ed Owen for mechanical work, he's the man!
They did a little body work for me too and not surprisingly it was great.
If you see the number of immaculate old MB's there you'd understand