Thread: High rev sound
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      11-09-2012, 03:21 PM   #15
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Drives: F30 335i 6spd
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Originally Posted by Roki_014 View Post
hey I just read somewhere else that this feature is used to automatically increase the volume of the radio as speed increases
This. My E46 has the feature as well. As I hit 40mph, the volume gets a boost to combat wind noise.
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