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      03-31-2017, 01:37 PM   #4
Pinewood
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Drives: BMW X3 30d M sport LCI
Join Date: Feb 2016
Location: Buckinghamshire

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Your system will have the system whereby the radius of the wheel/tyre is measured. Put the summer tyres on and do a reset from iDrive,then just drive.
On cars 09/2014 onwards the wheel have TPMS sensors which give exact psi readings on the iDrive display.same procedure of resetting the system, then drive off.
Appreciate 0