I would call them up and ask if they can arrange for the car to be towed back in for repairs, If they rebuilt it for cheap than they probably wont pay but if you paid as much as I would guess you did they should cover the bill.
Hopefully it is just something overlooked upon assembly but that also leads to the question...was there anything else overlooked?
Good luck with it!
95 E34 530I V2.37
===========
Those who make peaceful revolution impossible will make violent revolution inevitable.
John F. Kennedy