This evening i got a flat tire message from the computer. The 750 came with run flats. The warranty has expired about 6 months ago, should i go into a dealership and let them have their way? I want to get it checked up, i bought it used 2 months ago and wanted to see if everything is fine. Any one have an idea how much a thorough checkup would cost? And about the tires, are they repairable?