It's a Jag...it isn't going to be trouble free and it isn't going to be cheap to fix. It is a beautiful car but I wouldn't want to have to pay for all the repairs you're likely to encounter with Jaguar ownership.
Some reviews:
"The S type will make a person financially poor there is always a problem fuel system, a/c system. Every time I go in for an oil change there is a new repair problem.You can never get an assistance from the service department there a charge to tell you what is wrong with the car. The car is pretty and that is the only good things I can say. I will not purchase another Jaguar."
"My 2004 s-type spends far too much time in the shop. The car has 57,000 miles on it, but it seems to be falling apart. In the last 6 months my car has been in the shop 4 times. One time for 7 weeks because parts had to be made in Britain. Problems have been with the entire AC unit, radiator system, cooling leaks, catalytic converter, some kind of crack in the engine. Thank God for the extended warranty, however it is about to expire. I will be getting rid of this lemon next week as soon as I pick it up from being repaired yet again. It looks good, but runs terribly!"
"Superb car. Bought it in Nov 08 with 83K miles. It still had 1 yr/17K miles left on original factory extended warranty and I only paid $8,500 for the car at the dealer. Fantastic ride and quality. I've had $4,000+ of warranty work already to fix all problems (trans/motor/radiator leaks, and rear door lock, and transmission computer software reload). Highly recommend getting at least 6 months of warranty coverage to initially fix problems. Antifreeze is $17 per liter (Jag fluid only). New front brake pads and rotors will cost $700, so this car is not for the timid budget. Overall reliability has been very good though and a GREAT car overall. No regrets!"
"I and everyone else who rides in the car love the styling, inside and out. It is very comfortable and cruises great on any highway - smooth, fast, quiet, and 30+ mpg. My spouse really loves it in every way. But I pay the maintenance and repairs!! And at 30000 miles it has had a lot of repairs - radio (several times), transmission, heater valve, upper radiator hose, trunk, front wheel well, etc. We have 5 vehicles and drive a lot of miles a year 85,000+. I love to drive this car - it is my favorite, but the repairs are very disappointing."