Brand new 2012 X5d... in need of repairs, already!!!

[Marwan1]

Well, BMW managed to spoil my new car experience.

Yesterday, I received my 2012 X5d which I have leased from an out of town dealership. Someone drove the car to my address, and the car had about 400 miles on it when I received it (it was a 7 hour drive). The car is spotless, as expected for a new car. I drove it on a couple of short trips with no problems detected. And then my in-laws made it to town for July 4th. As we're driving back from the airport, I started hearing a thumping noise in the engine bay. Initially, it was faint but definitely there. I kept going because I surely did not want to stop in the middle of nowhere, with my in-laws in the car!... We finally make it home, and by now the sound is definitely noticeable. I open the hood with the engine stopped, and I couldn't see anything wrong. I turned the engine on, and now I could see something that appears to be a sliver hanging from the belt... The thumping frequency is proportional to the engine RPM which supports this being a belt issue, I think....

So, I have a few questions I would appreciate any answers to or help with.

1. Is this a known issue with 2012 X5ds? Has anyone else had a similar issue with their car when it was new?

2. The out of town dealer FedExed the lease contract which was supposed to make it before the car for me to sign and return with the driver (who also picked up my old X5d and drove it back to the dealership). For some reason, the mail was delayed and will be here sometime on Monday, so I now have a new car in need of repairs, the lease of which I have not even signed. Should I sign the lease or not?

3. I realize any repairs should be covered by the warranty but does the warranty even kick in before a lease contract is signed? In other words, if I take the car to the local dealership for repairs on Monday in the morning, who will be responsible for the repair cost?

4. I'm not a mechanic but can only imagine that if the belt breaks or something, the car will obviously be immediately immobilized, not to mention the potential damage to other parts of the engine a loose belt flying all over can cause...So, should I drive the car to the dealership on Monday or should it be towed there? Fortunately the dealership is only about 4 or 5 miles from home.

So, here's my new car experience so far. Thanks for nothing BMW!!!