Remove driver's seat

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WARNING: Pyrotechnic components.
Danger! Immobilization period-threatening injuries!

All work on pyrotechnic parts may be carried out by technically experienced and appropriately trained personnel only.
Replace any damaged part or ones that have been dropped.
For additional information see: SAFETY REGULATIONS FOR HANDLING COMPONENTS WITH GAS GENERATORS .

Removing the strap fitting

Adjust the front seat completely to the front and top.
Loosen screw (1).
Remove end lining (2).

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Shift front seat forwards.
Loosen screws (1).

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Shift front seat rearwards.
Loosen screws (1).
Adjust the front seat to the center position.
When removing the driver's seat:
Move the steering column to the fully retracted position and shift upwards fully.

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Deactivating the 48 V electrical system

Precondition

Ignition is switched off.

WARNING: Deactivate the 12-V electrical system.
Risk of short circuits! Risk of fire!

Make sure that there is no battery charger connected to the jump start terminal in the engine compartment.
For vehicles with additional electrical systems (48 V electrical system, high-voltage vehicle electrical system), this absolutely must be deactivated before the vehicle battery is disconnected.

WARNING: Deactivate the 48-V electrical system.
Risk of short circuits! Risk of fire!

Make sure that there is no charger ? connected to the jump start terminal in the engine compartment.

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.

Deactivate the 48 V electrical system by opening the hood.
Deactivation is automatic.

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Check

NOTE: TECHNICAL INFORMATION
Zero voltage (48 V electrical system switched-off) is only displayed in PAD mode.

Press the START-STOPPING button quickly 3 times without stepping on the brake pedal to establish the PAD mode.
Check the de-energized state in the instrument cluster (KOMBI) in the PAD mode.

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Desired state

The Check Control message "48 V electrical system." switched off (1) is displayed.

Result

Absence of voltage cannot be specified with the Check Control message "48 V electrical system switched off." (1). Work start is not permitted.

Measure

Repeat the "deactivate 48 V electrical system" service function.
- Vehicle management > service function > voltage supply > deactivate 48 V electrical system
Only if the Check Control message "48 V electrical system switched off." (1) is displayed in the instrument cluster (KOMBI), the 12V battery may be disconnected.

Contact the technical support if the absence of voltage is not clearly given.

Result

The Check Control message reports that 48 V electrical system is switched off.

Measure

Exit PAD mode by pressing the START-STOPPING button once without stepping on the brake pedal.
"Disconnect the negative battery cable of the 48-V battery" work can be started.

Unlock and disconnect the CAN bus plug connection (1) of the gear sensor.
Release the clip (2).

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Loosen nut (1).
Detach the negative battery cable (2) of the 48-V battery from the negative battery terminal, set to one side and secure.

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WARNING:
Unprotected battery terminals.
Risk of short circuits! Risk of fire!
- Cover the vehicle battery.
Cover the vehicle battery with the special tool 2 452 007 as shown.
Position the battery ground lead (1) as shown.

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Disconnecting all battery negative leads

See DISCONNECTING THE NEGATIVE BATTERY CABLE OF THE SYSTEM BATTERY .

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NOTE: RISK OF DAMAGE
Careless handling of tools and sharp-edged components.
Scratches, surface damage.

Protect working area.
Handle tools and components carefully.

Cover the door sill using protective covers.
Place front seat (1) to the rear.
Unlock plug connection (2) and disconnect.
Loosen the cable clip (3).

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NOTE:
RISK OF DAMAGE
Heavy component.
Heavy components can lead to injury or damage.
- Remove and install heavy components with the aid of another person/other persons.
Lift out front seat (1) with the assistance of a second person.