Buy a tire gauge and then you'll know what your pressures are. If you think BMW's must be hi-tech, I've got a gauge with both voice and digital output. But the main thing is that without measuring, you have no idea of what kind of pressures you are carrying as the 1 series gives only a warning, not a dash readout for each tire. (I'd also recommend a 120v compressor so that you can accurately set the pressures at home, before the tires have warmed up - they cost about $50)
Tom
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