How do you install a new auxiliary battery?
Install the new auxiliary battery 000000004039 in reverse order. You will need to remove the passenger seat bolts and tilt the seat forward on the ML and GL models. You will need a Female Torx Socket Set to remove the Torx bolts.
How to change auxiliary battery in Mercedes ML?
You will need a Female Torx Socket Set to remove the Torx bolts. Another option is to move the passenger seat forward and up. Then remove the main battery under the passenger seat. This will allow you to access the auxiliary battery. Remove the key from the ignition.
What happens when an auxiliary battery is replaced?
Accessories are removed as needed for access. The defective Auxiliary battery is disconnected and removed. The battery connections are cleaned and the new Auxiliary battery is installed, secured, and connected. Any accessories that were removed for access are reinstalled. The Auxiliary battery is tested for operation.
Why do we need a Mercedes auxiliary battery?
It made sense for us to do things this way because we have a large solar system, lithium batteries, and an inverter that would have boiled the stock aux battery. Even if you do want to use the stock alternator as a charging source, there are alternatives to the Mercedes auxiliary battery components.
Install the new auxiliary battery 000000004039 in reverse order. You will need to remove the passenger seat bolts and tilt the seat forward on the ML and GL models. You will need a Female Torx Socket Set to remove the Torx bolts.
You will need a Female Torx Socket Set to remove the Torx bolts. Another option is to move the passenger seat forward and up. Then remove the main battery under the passenger seat. This will allow you to access the auxiliary battery. Remove the key from the ignition.
It made sense for us to do things this way because we have a large solar system, lithium batteries, and an inverter that would have boiled the stock aux battery. Even if you do want to use the stock alternator as a charging source, there are alternatives to the Mercedes auxiliary battery components.
Where is the aux battery in a Mercedes?
Still, charging and discharging a higher capacity battery located in the aux battery location under the hood has some issues. First is wire gauge. The aux battery wire is quite long. It goes from under the hood all the way to the driver seat base. It’s not very fat.