The speedo is a little ahead to make sure you're not speeding accidentaly.

 

Unfortunately it isn't available as a retrofit. I called my parts
technical hotline to see if there were plans to release a kit in the
near future, but they said not at this time.

very frustrating, considering i was mislead by the sales person from the
dealership saying that it had it, and then after papers were signed it did
not. very disapointed.