The anit-theft option is an alarm, a real basic one albeit RARE! It was an option oin the 300D, along with rear head rests, velour, leather and ortho-seats... I think it was about $300 and change. Its rare to find an 85 with ANY option. May I ask how you have a code guide???? Maybe I have options I don't know about... Please show me any code-cracker...