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  1. Audio on E39: Loudness or Bass tuning ?

    E39 (1997 - 2003)
    Hi everyone, Since I've bought my 530, I'm still not happy with the original audio system that comes with it. I have a 530D, with the NAV system but no equalizer. As you may have noticed, it seems there is no Loundess with the standard Audio system. Therefore you cannot control automatically...