I hope this is the right spot for this question. I thought that I read somewhere that my P85 with AP would be able to change its speed based on the speed limit. In other words, if I were in TACC with +3 over and the car went from a 35 mph limit to 45 zone it would automatically increase to 48 mph...and also decrease if the speed limit dropped. Is this true? If so, how must i set TACC and/or AP. thanks from a happy newbie!