Yeah its an S600 and a very good example of the breed. I'm not to worried about repairs since its in such good shape and a fun car. If I have to spend a few grand whatever, its a toy. The PO is my best friend an has a nice little fleet of MB's. Last year it got a new starter and window regulator, for example.
All it needs right now are tires and fluids and filters. I have known the car for about 13 years and its been in a garage and hardly driven in the rain let alone snow. I really don't think its ever seen snow.
I'm very familiar with the W140 and I think while the "lesser" models are good the S600 with the SLS all around is still the best you can get.
Jim 700 made is kind of common, I think the car I'm working on is one of a few hundred at most. My SDL was 1 of 1
AFAIK so I like my Mercedes rare.