The rear cargo area of certain BMWs are equipped with tie down rails to provide easy attachment points for accessories. Still have questions? Call our BMW Genius Hotline at 1.844.4GENIUS (443-6487) Available Monday through Thursday 9:00am-9:00pm (EST), Friday 9:00am-6:00pm (EST), and Saturday 10:00am-7:00pm (EST) For portable assistance available anytime, anywhere download the BMW Genius App at bmwgeniusapp.com If you would prefer to send us an email, please contact: bmwgenius@bmwusa.com You can also refer to your owner's manual or visit: bmwusa.com/owners-manuals.html Connect with BMW USA: Website: bmwusa.com Facebook: facebook.com/BMWUSA Twitter: twitter.com/BMWUSA Instagram: instagram.com/BMWUSA Applicable Option Codes: 493