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It may be the detection of things at the side. I've got the surround cameras so it may be different if you haven't but in normal driving at low speed you can turn the cameras on by pressing the "P" button (the next one up from the Auto Start button). If you do this then when you drive past an obstacle at the side like a parked car at the kerb then it makes a different "bong" to the front and rear "beep". If you're backing out of a garage then it could be this reacting to the garage door frame or other close by side obstacles on your drive.
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G42 M240i xDrive. Brooklyn Grey, 19" Bicolour Double-spoke style 893 M alloy wheels with performance tyres, Technology Plus Pack, M Adaptive Suspension, Harman/Kardon Surround Sound Audio System, Heated Steering Wheel, Aluminium Rhombicle Interior Trim
Last edited by dy444; 09-28-2023 at 09:06 AM..
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