Mercedes Auxiliary Battery Malfunction **EASY FIX!** 

*OTHER REVIEWS TO WATCH*: Ford: 1997-2004 F-150 Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-eaKffURoFQY.html 2004-2008 F-150 Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-duNWJA7m63s.html 2009-2014 F-150 Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-3IpC-mHY0xM.html 1998-2011 Ranger Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-fELUyrKY1U4.html 1994-2004 Mustang Buyer's Guide ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-TMKyjs1F5yU.html 2005-2014 Mustang Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-lrfpgzcgLI8.html 1992-1996 Bronco Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-sm3aMyix4tk.html Toyota: 1996-2002 3rd Gen 4runner Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-6Oorr2Ymob0.html 2003-2009 4th Gen 4runner Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-zk2CKLxm6Dg.html 2010-2022 5th Gen 4runner Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-aqqPAwdqF9o.html 1995-2004 1st Gen Tacoma Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-WtyhiOD8Jm4.html 2005-2015 2nd Gen Tacoma Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-9ZOhD0KU_gA.html 2000-2006 1st Gen Tundra Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-9pIyUcFGf4c.html 2007-2020 2nd Gen Tundra Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-fhH4UnFvJuI.html 1991-1997 Land Cruiser Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-8dnMu2WzYRo.html Chevy: 1968-1972 Chevelle Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-G1AXfLXwb9o.html 1972-1987 Square Body Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-78oolTruPdQ.html 1988-1998 Silverado /Sierra Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-pLs-KWSucjo.html 1994-2004 S10 Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-CmfgCOxW6XA.html 1999-2007 Silverado / Sierra Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-LmN6_ubzyuI.html 2000-2006 Tahoe/Suburban Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-I15DfJBly1c.html 2007-2013 Silverado / Sierra Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-_UXTc5BGxsM.html Jeep: 1984-2001 XJ Cherokee Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-YoNrkxEew4Y.html Mercedes: W211 E-Class Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-QpplQTp2DSQ.html W212 E-Class Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-IYZSnLzdNp8.html W212 Best E-Class(?): ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-UNF5piFLS4U.html W204 C-Class Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-BtCbbrsQQ-Y.html W205 C-Class Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-CHVDM7AfKfM.html W222 S-Class Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-5E9U0zEkWdg.html Mazda: 1990-1997 MX-5 Miata: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-KjNB-LbkNSY.html Nissan: 2004-2015 Titan Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-2VFdZeEyGnA.html HardBody Pickup Truck Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE--mRVMByFh_I.html 2005-2021 Frontier Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ES35uwDBhPY.html Subaru: 2014-2018 Subaru Forester SJ Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Ir694Wah9PA.html Lexus: 2001-2005 IS300 Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-mtxoUg0zthw.html Porsche: G-Series 911 Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-j7KiZbfOCpM.html 1999-2005 911 996 Buyer's guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-rvdMzS8XdXk.html 2010-2016 Panamera Buyer's Guide: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-3giueysuXdU.html

Fairly straightforward, thanks for the tips. Hardest part was putting the plastic tray-panel back in on the right. New battery fixed the problem. Oh, it was hard to find the righthand bolts on that tray, because there's a removable liner that hides them. Baffled me for the first 10 minutes.

Very easy battery replacement. Takes about 10 minutes and as stated, a ratchet with a 10mm socket will do the trick. You'll want to call ahead to your local automotive parts shop to see if they have it in stock. In my case, both O'Reilly's and AutoZone only had 1 auxiliary battery in stock, both at the same price. That said, you can actually do the swap in the parking lot in minutes and have the shop take your old battery when done.

Disconnect the negative terminal first!

Even easier fix, fiddle with the connectors and then try the car again. Sometimes the battery malfunction disappears. I did this two years ago and it’s been fine since.

I’m getting the same message “auxiliary battery malfunction” on my 2013 CLA45 it won’t let me switch from eco mode to sports or manual mode and my parking sensors aren’t working, going to replace the battery tomorrow hopefully that solves the issue

Will a bad auxillary prevent my car from starting its a 2014 e350

How 2007 Mescedes SL550 ?

I changed my auxiliary battery not even a year ago and I’m again getting the malfunction message

Changed the battery in the trunk for my 2016 E350, still getting the malfunction message

Is this guy dead?