I have had my MX for about 7 months mostly without issue. About 2 months ago, however, the parking brakes locked up and couldn't be unlocked. This resulted in a tow to the SC and both parking brakes being replaced. Now, about 1 week ago, I couldn't drive the car with a 12V & Air Suspension error. Originally the SC thought these new errors were related to the HV charging system but after replacing the HV charging system the errors are still present. At this point, in the words of the SC advisor "we have no idea what is wrong with your car." So....is it reasonable to ask for a new car? I asked how long it might take for them to figure out what is wrong and the SC advisor told me he had no idea but I should expect to hear from them in a week or so. I am losing faith and confidence in the car! Suggestions?