When I bought my 2018 car this year the display was in psi but the MM phone App had kPa. I managed to change MM to psi so both were set to psi.After having my alloys re painted (as the main dealer bodged the wheels with a smart repair) the sensors stopped working for three weeks.They now work but are in psi on the MM App on the phone but on the central display are back to kPa and I’m struggling to change it back. Some say it can’t be done however it must be possible as it was on psi a month ago.The main dealer told me there is no way of changing to psi in the App but he was wrong as I managed to change it !
These are not cheap cars , the systems should be more intuitive for old gits like me.