I am in the market for trading in my old car and purchasing an "S" type. What are some things that I should look for in this car? Thanks!

Make sure that you get All Wheel Drive so that you can control all the power in that car. When I was a mechanic I got lots of faulty Air Conditioners so I would suggest an extended warente. Also I would consider leasing it because the Jags don't last that long.