2009 C300 Car Won't start
They suspect it's something to do with my key, and suggested that I get a new one and have them program it to my car, but said they can't guarantee that's going to solve what ever the problem was. They wanted to charge me $485 for a new key and programming - but no guarantee that will fix the problem.
Car starts fine now but I am sure this will happen again.
Any help shedding some light would be greatly appreciated.



