Hi Jambox - you'll be glad to know that really the CS doesn't have anything significant that I'd consider a weak spot. Check out the box during downshifts, it shouldn't graunch. Listen for bearing noise from the chargecooler pump (rev the engine a little while stationary to trigger the pump movement) and look out for excessive oil in the intake where it attaches to the turbo. Check that it doesnt put out blue or white smoke when left idling for a few minutes and doesn't misfire under load at high revs. Driving in 2nd, accelerate lightly, then lift off quickly, listen for a clunk (rear diff cushion wear will make it knock once). Brake lines will be on their way out by that age if not done already, as will rad hoses and check to see if the radiator plastic on the top tank is going orange - they do die at about the 18 year mark! I'm sure someone else will point out something else, but that would be my main tests on a CS - just purely because of the age of them these days.