How to fix Mercedes Benz GL450 Auxiliary Battery Malfunction for $50

In this video I will show you how to retrofit pretty much any 12 volt battery in order to replace a malfunctioning Auxiliary Battery in a 2015 GL450. I used EverStart ES TZ10S which has identical width and length, it's just not as tall as the original Mercedes battery. You can choose any batter from the shelf in your store, just look for it to be approximately the same size as the TZ10S or it could be smaller so it will fit the metal housing for that battery.