I have a couple issues with my 1993 C280 that may or may not be related.

First of all, the radio in my car has completely gone out. It turns on but no sound occurs and there is no "pop" sound for the sign of speaker connection. I took the panels off and the speaker connections were properly connected and the speakers seemed good. They did not go all out at once but one by one... they also had high pitched squeals and yells. All fuses are good.

The second issue may or may not be wiring related as well. The rear running and brake lights have issues. The left side light panel has good connections and bulbs, but produces no light at all, I have tried switching bulbs but with no success. Again, all fuses are good.

The third issue is that the turn signals work intermittently. They work on and off regularly, but when they are malfunctioning they will barely work in certain positions when turning the wheel. I do not know if this is an issue of an older car or a serious issue.

The lights issues are fairly important as they are safety issues and inspection problems. Thank You for any help!