take it back to the dealer, u should have merc warrenty and they should fix it. Here in australia any dealer has to put their own 30 day warrenty on any car sold, called a lemon law so buyers dont get riped of , eg a few years ago we had a flood, thousands of cars were sold thru auction yards as insurance companies wrote them off, these cars are still on the road today being sold as good cars, but they have a long list of problems u wouldnt sent to ur worst enemay, so get some legal advice on what u are covered for and go for it. or buy a mustang mate