CPO/Dealer Problems...NEED ADVISE PLEASE

[angels6377]

I bought a 2005 X5 last January from a BMW dealer in RI. They told me that the vehicle had not been CPOed so I asked why and could they. Of course they could, so I paid the additional 1500. Every time I brought this vehicle in for troubles, I was being wacked with diagnostic fees, and they never find the problems or tell me its not covered. After 4mths of owning the vehicle a warning light came on for the front brakes that needed to be replaced, after fighting with them that I only put 4,000 miles on the vehicle, why am I responsible for $1600 brake job already? Now my vehicle is in the shop for a 45k inspection (63,000k on the vehicle) and an internal engine problem. Diagnostic fees to find out if it is warranty? I started to dig...nothing makes sense.

After some digging, I find out the the vehicle was CPOed on 11/28/08 2 months before I purchased it. Did I pay for CPO twice??? and...Does this warranty a refund for a brake service that I had to pay for? there was a difference of some 300 miles between the CPO process and my purchase date. Anyone have advise??