How to fix Auxiliary Battery Malfunction on Mercedes S550 w221

In this video I answer these questions: What is the Auxiliary battery used for? Why does it fail? How to replace it? Link to a factory Mercedes Aux Battery: https://amzn.to/3D4QdEY The video has a link to an aftermarket Aux Battery for a less expensive option This is the same repair process for all 2007 2008 2009 2010 2011 2012 and 2013 Mercedes-Benz S550 w221. If you'd like to jump right to the answer: 00:00 Intro 00:49 What is the Auxiliary Battery used for? 01:30 Why is the "Auxiliary battery malfunction" message displayed? 02:21 How to replace the Auxiliary Battery? **Giving this video a "Thumbs Up" really helps with the YouTube algorithm, Thank you an advance! ** **Consider Subscribing to Jamie's Garage here:    / @jamiesgarage1   Check out Jamie’s Online Store: https://ourwearhouse1.myshopify.com/c... --I really appreciate it! ---As an Amazon Associate, I earn from qualifying purchases ---Credit Doug Butler Producer/Editor --------------------------------------------------------------- Follow me on social media! -- TikTok: / jamiesgarage -- Instagram: / jamiesgarageofficial – Facebook: / jamiesgarage1 Jamie is the Owner of Elite Motor Works, Renn Haus and Elite Auto & Tire in Sarasota and Bradenton Florida, Check out his social media in the links below: -- Elite Motor Works Website: https://www.elitemotorworks.net -- Renn Haus of Sarasota Website: https://rennhaus.com – Elite Auto & Tire Website: https://eliteautotireusa.com/