Connecting the negative battery cable of the auxiliary battery in the engine compartment

Removing the vehicle battery cover

Raise the battery ground cable (1).
Remove special tool 2 452 007 .

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Connecting the negative battery cable of 48-V battery

NOTE: RISK OF DAMAGE
Damage to the 48-V battery
If a 48-V battery that is disconnected from the electrical system is activated, the battery electronics will be damaged.

Only ever activate the 48 V electrical system when the 48 V battery is fully connected up.

WARNING: Incorrect screw connection of the positive battery cable.
Risk of fire!

Ensure that the positive battery cable is screwed with the correct nut.

Release the negative battery cable (2) of the 48-V battery from the attachment.
Position the negative battery cable (2) of the 48-V battery on negative battery terminal.
Tighten nut (1).

TIGHTENING TORQUE SPECIFICATIONS

Negative battery cable to 48-V battery
Nut M8	tightening torque	19 Nm

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Connect the connector (1) of the CAN bus and lock it.
Clip in clip (2).

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Attaching the negative battery cable of the vehicle electrical system support battery

NOTE: Schematic diagram is for example purposes. Some parts may differ in certain details.

Position the negative battery cable of the vehicle electrical system support battery (2) on the negative battery terminal as displayed.
Tighten the nut (1).

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TIGHTENING TORQUE SPECIFICATIONS

Battery ground lead to battery
Nut M6	Tightening torque	5 Nm

Connecting the negative battery cable of the 12-V dual storage system

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NOTE: Schematic diagram is for example purposes. Some parts may differ in certain details.

Release negative battery cable of the 12-V-dual storage system (2) from the mount.
Position the negative battery cable of the 12-V dual storage battery (2) on the negative battery terminal as shown.

The nut (1) is connected to the negative battery cable of the 12-V dual storage battery (2) and can therefore not be lost.

Tighten nut (1).

TIGHTENING TORQUE SPECIFICATIONS

Negative battery terminal 12-V dual storage system
Nut	tightening torque	19 Nm