For Smart models ICC can calculate a request code (TAN) for synchronization of SAM. This procedure called in DAS - "Carry out control unit assignment".
To calculate a TAN code - enter VIN and click "Calculate" button. In few seconds ICC will show 12 chars incode for DAS. Enter it as shown on picture.
DAS - SAM unit assignment:
After synchronization of SAM unit you can start procedure "Teach-in key again".