Tips on Buying Cars: BMW Warranty Question, bmw z4, warranty question

Question
Hello,
I'm thinking of buying a used 2003 BMW Z4 from a local Acura dealership, its on their used lot.  They said they took it in on a trade.  I'm told that the guy who traded it in bought it as a Certified Pre-Owned, therefore it comes with the 100,000/6 year warranty that comes with the CPO program.  You can see the car here:
http://www.cars.com/go/search/detail.jsp?tracktype=usedcc&searchType=21&paId=209...

I have a couple questions:  is there a way to find out for sure if this car is a CPO and covered under that warranty and is the warranty fully transferable to me?
Any advice you can provide would be appreciated.
Thank you,
Kevin

Answer
Hello,
The dealership should be able to provide documentation of the warrenty, because without it, the warranty might not even exist (or atleast you can't prove it) - You would have to find out what dealership it was orignial bought from (the one that gave it the warranty) - should be able to get that info from the currenty dealership (perhaps its on the title).. If you can get that, and can get the VIN number off the car, you can call the dealer that holds the warranty and find out if it is still active, or even exists.. Otherwise, without some sort of proof or documentation, I wouldn't risk it, on a car like a BMW the warranty could save you thousands.  I say either ask them for proof of the warranty, or the information such that you can get the proof yourself, its the only way you can be sure.  As far as being transferable, the original dealership should be able to tell you that one, so make them ask or you ask them.. Depending on which route you take.. I hope this helps.. Good luck!