Security System

Hello. I am looking to buy a 2004 Rav 4 and am confused about the security system. What is the difference between the rs3200 deluxe system and the rs3200 plus system? I want to be able to program and install it myself after I purchase the Rav. I would like the option of the doors automatically locking and unlocking when I turn on and off the ignition. Thanks for any help.

the rs3200 plus is for cars already equipped with keyless entry. go to rav4world.com under links is info for alarms.