OK, We gonna make this work for you. This vehicle has the PATS module in the instrument cluster, So, if you don't have a great battery connect a slow charger. Hook up your DS708 and use one of you UN-PROGRAMMED Keys and go into the instrument cluster. Look at LIVE DATA , all PIDS and check these PIDS, NUMKEYS should be less than 8, tell me what it is. Then check PID SPARE KEY PROGRAMMING, it should be ENABLED. IF these are correct then go into SPECIAL FUNCTIONS then PATS. After the 600 second wait out you should get access granted, you have to click OK a couple of times to get to the main menu. Once there select program additional key. It will tell you that you should have an un-programmed in the switch. You may have to click OK, just follow the menus. Once successful, uses ESC to exit out of that module on the DS708 all the way back to the main screen of the DS708, all the way back to where you can power off the DS708. Power it off, and remove the cable from the ODB2 connector, then start counting. Leave the key ON for 30 more seconds, then turn it off. Remove the key and reinsert it. It should start the car. You can add more keys using this OR the process in the manual.
Let us know, and good luck!
Thanks