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anyone know about hd radio?
hey i just bought a 2008 m3 and i forgot that the older ones do not come with hd radio as a standard my car does not have hd radio as i have looked for it nor does it pop up when i turn the knob on the idrive and leave it on a station for a few seconds.. my question is can you upgrade to a hd radio if so any idea about a price and install?
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