In this video I test and replace the auxiliary battery in a 2003 Mercedes E320. This battery is 9 years old and it has lost its ability to output a high amount of current at 12 volts.
In this video I use my trusty battery tester which can be found here: https://amzn.to/342r4qT
Also my multimeter to do basic voltage testing, which can be found here: https://amzn.to/3iAeN18
I also use a socket set, which can be found here: https://amzn.to/34e3Q1t
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