Here is Step-by-step Guidance :
1. Turn on ignition with dealer key and read out eeprom data thru 9S12DT256 for Audi A6L.
Select IMMO key programmer->VAG-> Audi
Select 4th generation immobilizer system
Read EEPROM data (backup)
Turn ignition to ON position
Reading eeprom data
Save eeprom data
2. Generate CS code and PIN code from EEPROM data thru 9S12DT256.
3.Generate Dealer Key from the EEPROM data(Bin file) and do Key Data Learning with OBDSTAR RFID Adapter Chip Reader.
Connect RFID adpater with X300DP tablet
Insert the new key into OBDSTAR RFID Adapter
Make sure you have backup the eeprom data
Enter key numbers to be programmed (1-8)
Turn ignition to ON
Insert the key to be learned one by one and follow X300 DP prompt
After key learning done, test the new key to turn on the ignition.