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When is radio code useful?
Yesterday I forgot to turn off the light and the battery was depleted enough that it is no longer able to start the car. (But the instrument panel was still lit up.) So I charged it all day today and started it. To my surprise, everything works just fine. I lost some settings, but I was able to use the radio etc. Can somebody educate me what is the use of the radio code? I was going to input it somewhere, but it seems unnecessary.
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