Might be something to do with the speed volume in idrive settings (depending on setting, the faster you go the louder it gets and vice versa)
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BMW F25 X3 xDRIVE 20d SE
Black Sapphire | Oyster Leather | Fineline Sienna Wood | 307 V Spokes | Auto | Prof Multimedia Package | xLine Package | Xenons | Business Radio | Sports Steering Wheel | Sports Seats | Panoramic Sunroof | Sun Protection Glass | Sun Blinds | Folding Ext. Mirrors + Titanium Grille | Chrome Exhaust Trim | Mudflaps
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