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On the M models there is an M button on the steering wheel. Not sure about the non-M versions.
I’ve seen some folks physically jam a rod or screw in the valve opener arm to keep the valve open.
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2006 Z4 M Roadster - Silver Grey Metallic
2011 X3 xDrive28i - Deep Sea Blue Metallic
2012 X5 M - Monte Carlo Blue Metallic
2017 X1 xDrive28i - Alpine White
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