I went back and picked up the car and the radio works fine now and does not turn off, even when the left signal is on, but the left signal is still not working at all now. The lights illuminate on the outside when you turn on the flashers, but still no turn signal on the left side. The MB tech said that radio issue was probably because of loose battery cables - so far so good. He said he didn't think it was a short in the signal. I am betting that combination relay is bad. I have to figure out where it is and where the cheapest place to get one is.