My key won't turn in the ignition

Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. I'm sorry to hear you're having trouble with your CLK320. When the key doesn't turn in the ignition, it could be caused by a worn key or ignition lock cylinder. Sometimes, wiggling the steering wheel gently while trying to turn the key can help if the steering lock mechanism is binding, even if it doesn't feel locked. If that doesn't work, it may be time to consult a trusted auto repair shop near you. If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!