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Video: M135i cabin engine sound is generated / boosted (Active Sound like M5)
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01-02-2013, 11:56 PM
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donaldt
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Drives: M135i
Join Date: Aug 2012
Location: Hong Kong
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could there be a fault with the HK system?
I tried again and there really doesnt seem to be much of a difference with and without the unit, only very slightly
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