I was told that the additional functions that come with the sport chrono package such as adjusting lighting, wipers, AC, and door locking do not work unless you also get the navigation option. Is this true? Thanks!

 

No true, its on the PCM screen.

 

Concur with Texas911. Those controls are standard with the Sport Chrono Package Plus (Navi not required).

 

May as well get nav option or else you have some buttons which are labeled for nav use but do not work.