Bruce, thank you for your feedback. We are always looking to improve our customer experience and appreciate any input from our customers. ^cc

Hello Barbara, We encourage you to visit your local authorized Hyundai dealership for further inspection and assistance concerning the rattle.  If you have any questions or concerns about Hyundai vehicles, please contact our customer connect center at (800) 633-5151. Thank you ^cc. 

Hello Cyril, You can find additional information on the safety features that are triggering the alarms in chapter 7 of the owners manual. Here it describes the features, how to change settings and other information about the features.  If additional information is needed there are Youtube videos available as well.  If you have any questions or concerns about Hyundai vehicles, please contact our customer connect center at (800) 633-5151  Thank you ^cc.