You can do a Google Search for a web sight that can provide you with a copy of the window sticker. I have seen reference to this website on either Challenger.com or ChallengerForumz. Also, the dealer should be able to provide you with a copy of a document called, "Warranty Unit Inquiry". It shows the build date and shipping date for your car. I got one for each of my smart cars from the service writer. He pulled it up on his computer. You will need to provide a VIN.