I believe that ALL years can have evaporator problems, but the wiring harness issues were resolved in '95 and later models (side mirrors can still have problems though). Your best bet is to review the maintenance records and find out if these repairs have been done. If they haven't I would suggest negotiating a better price or buying an aftermarket warranty. The evaporator swap will cost you about $5,000 because the monumental amount of labor involved. The wiring harness is almost a DYI job. In fact, someone over at Benzworld.org actually re-built the wiring harness on his S600 by hand!

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"It's not about how fast you can go, but how well you can go fast."

Bob in Richmond

'97 S320 (LWB), Ruby Red Metallic, 73k miles
'97 S420V, Smoke Silver Metallic, 155k miles