SMART 450 from 1998 to 2005SMART 451 from 2005 to 20141. Supported featuresThis key-learning device supports all SMART vehicles. All you need is a prepared key for SMART and for some models you must use a prepared by Abritus72 transponder.1.1. “Key Synchronization over K-Line” Automatically establishes a diagnostic session with the SAM unit and performs synchronization of all available keys over K-Line.1.2. “Key Synchronization over CAN” Automatically establishes a diagnostic session with the SA..