Did a bit of digging and found that if you have the Navi system radio or factory DVD system, that adapter won't work.
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Also check the fuse at the back of your radio. Pull it to check.
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There is no point removing the battery cable to try and reset the radio. They don't work like that anymore.
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The vehicle does a system check and as long as that is the OEM radio it was shipped with, it will work. (as long as it is broken.) You can even pull the radio out and leave it out for a week, the car will still recognise it and work.