Me and my pal had one to smoke about in/work on for a week, it needed 2 bottom arms, 2 strut tops and front shockies. . . also check drop links if you hear any knocking.

Engine - their was a hissing noise which turned out to be a split actuator pipe, and before that it had a hole in one boost pipe

This one had done 156K and apart from all that it was a nice car, wasnt sure on the blue leather but it went like a train for such a large heavy car!

Also if it uses any oil, it's usually a blocked breather canaster, hard to get too tho as it's under the inlet manifold at the front, but this will probably be the reason for it. either clean, replace or uprate.

I think the auto's can suffer from dodgy sensors in the shift stick thingy. .and from cold they can stick in 2nd/3rd gear. . so im told

sorry dont know very much about these cars, just know what was wrong with the car we had so might give you an idea of what to look for.