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  1. BMW 3 Series Forum - Technical Talk on the BMW E46
    sorry if this is going on as I know there are a lot of threads, but I have bought one of those by-pass units and I am going to fit it. But I have a few questions. 1. It says I have to disconect the battery. Is this true? 2. If so, does the radio have a code? Thanks for any help on this...
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