Remove front seat

NOTE: Description is for left component only. Procedure on the right side is identical.

WARNING: Pyrotechnic components.
Danger! Life-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: 72 00 SAFETY REGULATIONS on handling components with gas generators.

Removing the outer seat rail cover

Unclip outer seat rail cover (1) in the direction of arrow (2).
Remove outer seat rail cover (1) in the direction of arrow (3).

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Removing front seat rail cover

Unlock the latch mechanisms (1).
Remove front seat rail cover (2) in the direction of the arrow.

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Fully adjust the front seat to the front and top.
Loosen screw (1).
Remove end fitting (2).

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Loosen screws (1).

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Removing rear seat rail trims

Move the front seat to the front.
Unclip rear seat rail trims (1) at side in direction of arrow and remove towards rear.

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Removing the front seat rail trim

Move the front seat to the rear.
Unclip front seat rail trims (1) at the side in direction of arrow and removed towards the front.

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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 move upwards fully.

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Deactivating the 48 V electrical system

Prerequisite

Ignition is switched off.

WARNING: Deactivation of the 12 V vehicle electrical system. Risk of short circuits! Risk of fire!

Make sure that no battery charger is connected to the jump start terminal point in the engine compartment.
For vehicles with additional electrical systems (48 V electrical system, high-voltage vehicle electrical system), it is mandatory to deactivate them before disconnecting the vehicle battery.

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

Make sure that no charger is connected to the jump start support point in the engine compartment.

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

Only carry out activation of the 48V electrical system with a completely connected 48-V battery.

NOTE: TECHNICAL INFORMATION
Follow notes for 48-V battery. See further information 61 20... NOTES on 48-V battery.

Deactivate the 48V electrical system by opening the bonnet.
The deactivation takes place automatically.

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Check

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

Press the START-STOP button quickly 3 times without stepping on the brake pedal to establish the PAD mode.
Check isolation from the supply in the instrument cluster in PAD mode.

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Desired State

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

Result

» The absence of voltage cannot be determined by means of the Check Control message "48V electrical system switched off:" (1). Work is not permitted to be started.

Measure

Carry out the SERVICE function "48 V electrical system deactivation".
- Vehicle management > Service functions > Voltage supply > Deactivate 48 V electrical system

Only when the Check Control message "48 V electrical system switched off." (1) is displayed in the instrument cluster is it permitted to disconnect the 12 V battery.

If the absence of voltage is not indicated clearly, contact Technical Support.

Result

» The Check Control message signals that the 48V electrical system has been switched off.

Measure

Exit PAD mode by pressing the START-STOP button once without depressing the brake pedal.

The WORK "Disconnecting the negative battery cable of the 48-V battery" can be started.

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

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Loosen nut (1).
Pull off negative battery cable (2) of the 48-V battery from the negative battery terminal, set it aside and secure it.

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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 earth lead (1) as shown.

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Disconnecting all battery earth leads

See ADDITIONAL INFORMATION.

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