Its been one problem after another with my car that i've only had for 1 year. I went to turn on the car earlier today and the key would not turn in the ignition. I work for Mercedes and had our Roadside assistance guy try to jump the car, but the battery is working fine. He even tested the battery and it is in good condition. I am beyond frustrated that this happened and over the past 2 days when I put the key into the ignition, it makes a click noise and sometimes takes about 2 tries in order to start. Please Help. I am having the car fixed monday because no one is open and had to have the car towed to Gm dealership for it to be fixed monday. Thanks.