You can clear or change your MyKey settings using the information display control on the steering wheel. See  Information Displays . 
Switch the ignition on using an admin key.
To clear all MyKeys of all MyKey settings, press the left arrow button to access the main menu and scroll to:

Message   Action and Description  
Settings
Press the OK button or the right arrow button.  
MyKey
Press the OK button or the right arrow button.  
Clear MyKey
Press and hold the OK button until the instrument cluster displays the following message.  
All MyKeys
   
Cleared

Note:   When you clear your MyKeys, you remove all restrictions and return all MyKeys to their original admin key status.