No you do not. There is a procedure with the key in ignition and holding down a button that will do it as I actually performed it myself years ago for same reason

EDIT: damn it. I can NOT track down anywhere how the procedure goes, but after I did a repair, I had the same error happen on my dash High cluster where the kms changed to miles somehow and for some unknown reason, about 6 years ago and I had to learn how to fix it back. nothing else changed from metric tom imperial measurements, just the kms to miles... I can't track it down online or in my personal How To guides that I have been stockpiling for decades on my Bimmers... Sorry but it seems the software way will have to be the only way at the moment.

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I swear, my cars are like a girlfriend.
Sometimes its a rough ride, sometimes its smooth motorin'.
Sometimes she doesnt like how i treat her and sometimes i dont like how she behaves.
BUT at the end of the day, she loves it when I am inside her.

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'91 850i
'05 X5 4.4i
'09 Clubman S