Last Friday my wife and I were going to head out for lunch. When I started my S4 (it was parked in our garage), I noticed that it was updating the stations list. After I pulled out of the garage, the update completed and my radio start playing; it was on a SiriusXM station. But I could not control the volume through the steering wheel or the knob on the console. About 15 minutes later, we hit a stop light and I turned the engine off, waited a few seconds, and restarted it. Still no volume control.
When we got to the restaurant and I parallel parked the car, I got out to check its position (don't want to take the chance that someone might hit my front or back when trying to get in or out of a slot. So I got back in the car, started it up, and moved it a little and when I checked the volume control, it worked.
During this time, when playing music from a flash card, the volume control worked fine.
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