I think the main reason behind the #8 + #9 was that the code that covered the audio alert was used in 2 places so both were modded, #8 has some problems when testing so only #9 was used, however TJJ is right #9 is all you need.

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Sept 03, M3, Silver Grey. Retro-fits: Modded Mk4 DVD Drive, OEM Bluetooth, VR Control, Rainbow Speaker Upgrade, Sony SOT Amp, HK Sub, CCFL, Intravee II, NightMode.