Yeah it does, if you have the trip computer. It's just a remote way to access all the information, so you don't have to reach down while driving. I do miss the fact that the 3ers don't have the display on the dash below the guages like the 5series, I really got used to that with my old 5er.
You can program that switch to look at various data (on OBC).
I programmed it such that when I press the switch first,
I get CONSUM1 (fuel consumption in MPG), when I press
the switch next, I get RANGE (miles left on the tank).
All of the above (how to program the switch) is in my manual.
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