I purchased an 05 300C especially built for me and it was delivered to me on September 04. I'm expericing tire problems. I have taken the vehicle to one dealership and explained the problem with the vehicle shaken upon reaching speeds exceeding 72mph. They said the rotors needed turning, which cost me 176.00. I then drove the vehicle to Mississippi and experienced the same problem along with the engine light coming on and staying on. I took the vehicle to a dealership in Mississippi and they said the shaking and the engine light was on due to carbon build up. I drove the vehicle back to Arkansas to a different dealership who stated they could not find a problem because the previous dealership turned the light off and it didn't have a code. One of the dealerships did say people were having problems with continental tires. One dealership has offered to balance my tires for free to see if thats the problem. The dealership said the tires were feathering. I called continental tires and they offered to give me a 35% discount on a new set of tires but not replace them. We have not yet figured out what is causing the problem.

 

Is the vehicle still under warranty? What is your mileage?