as long as they sell you the S600 '93 at a bargain low price, still it would be best to check on what needs to be done with that unit and what has been done.
Primarily, the engine harness, electronic throttle actuator and its harness, climate control module (check thru code reading, should be version 25 or below)caue version code 62 from that year model was a deffective software program.
These are the primary major problem that you will be facing, but on the other hand if these things have been addressed already, your going to have fun everytime you take the S600 out for a drive (except fuel milage) by far the best riding comfort and drivability in an MB model.
I've enjoyed mine up to this date, why should you not?