I have a 2005 E320 and I put the key in the ignition and the key will not turn at all. I took over payments for the car and when I picked up the car 2 weeks ago, when I turn over the key, the car would start, but all the gauges would not work. I found out if I turned the key slightly, not all the way, the car started and the gauges worked. Just trying to figure out the problem to get the car running. Roadside asst. Tried to turn the key and could not. A mechanic told me to spray some WD40 in the ignition and it did not work.