good luck getting a test drive. when i was looking for a car a couple of years ago nobody was allowed to test any m car without first paying a deposit. i was looking at 97-98 m3s worth a fraction of a new m5. it was no issue taking out non m cars but that deposit policy is in place to prevent people from doing what you want to do. i hope you can do it but dont be too dissapointed if they say no.