BMW being BMW prefer to dictate what information you can see unfortunately - despite having a full-screen instrument display.
The car has access to a whole load of data that it won't show but there must be a mode that will show some of it. I looked on my old 745 some time ago and could get all sorts up, but it was an involved process and returned to normal after a power-down.
Unless someone hacks the software, an option is an OBD connection and an app on your phone - you can get real-time information such as voltages, temps etc...
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2014 i8
2002 x5 4.6is
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