I'm pretty sure it's because there's a glitch with idrive in I think most NA cars. In my car, the camera doesn't default to the auto mode and therefore the camera doesn't turn. When I go into drive from reverse my camera stays in reverse instead of switching to the front camera. When I click the auto button on the surround view (the front one) my cameras turn and the front camera turns on when I go into drive. Not sure if that makes sense but that's the best I can explain it.
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