I have a 09 Challenger without steeringwheel buttons. How can I change it from miles to km?

Hi. I'm new here so first I like to tell something about myself.
I live in The Netherlands and am a big fan of US cars for more then 25 years.
After owning several classics like a 68 Coronet 500 (for 15 years) I began to drive in more recent cars. I just sold my 06 Charger R/T witch I drove for more than 5 years and now I have a 09 Challenger R/T.
And here is my first problem.
I don't have steering controls but is it possible to change from miles to km?
And how?
Hope to get a few good answers.
Thanks for excepting me.
Henk