On random, rare occasions, the accessory circuit (radio, etc.) on my '95 C220 will not be energized when the ignition switch is put in the "on" position. If the ignition is re-started (sometimes it takes several attempts), the accessory circuit will work. On very rare occasions, the circuit will go dead while driving the car, and only a re-start will fix the problem. In addition, when I use the headlight flashers (pull the stalk back) the accessory circuit will sometimes cut off for about 1/2 second, then come back on.
Does anyone have an idea as to what is wrong? I suspect a relay, but don't know which one or its location. Any help will be greatly appreciated. Thanks.