Yes, that's true, I have only the fixed cameras in my DB and run the mobile and redlight as the 2nd POI (no alert).

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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.