Advice On Purchasing Audi A8

I'm looking to purchase an Audi A8. Probably a 1998-2001! Does anyone have any advice as to any issues to look for with this car? I really like this car but I don't know anything about them! Any advice as far as flaws, maintenance issues, mechanical failures will be appreciated!

Well i think its good choice but I am little confused about those old models why don't you buy a new one like after 2000. I think it will be more good for you. If you are not brand conscious then try to find something in BMW.