Disconnect/connect ground line of on-board electrical system battery

AR54.10-D-0029TS

Disconnect/connect ground line of on-board electrical system battery

28.08.2020

Model

907, 910

Modification notes

27.08.2020

Method extended

Operation steps 7, 8.2

Shown on model 907 with code E30 (Battery master switch)

1

Ground cable

2

Trim

3

Electrical connector

Shown on model 907 except code E30 (Battery master switch)

1

Ground cable

2

Trim

4

Nut

 Danger

Risk of fire/risk of explosion due to short circuit and escaping oxyhydrogen gas. Risk of (burn) injury caused by caustic burns to eyes, skin and mucous membranes from battery electrolyte/mist, short circuit and arcing. Risk of poisoning caused by swallowing battery electrolyte or absorption of lead through the skin or body orifices. Risk of death due to voltage U >= 30 V AC and U >= 60 V DC.

No fires, sparks, open flames, or smoking. Wear acid-resistant gloves, clothing, and glasses. Pour battery acid only into suitable and appropriately marked containers.

AS54.10-Z-0001-01A

Topical note

General information on vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system as well as personal protective equipment

Model 910 with engine 780.703

AH00.00-Z-0300-01A

Topical note

Notes on battery

AH54.10-P-0001-01A

Topical note

Notes on carrying out repair work in the vehicle interior

AH68.00-N-0001-01S

 

Remove/install

1

Disconnect charging cable connector of high-voltage on-board electrical system and wait 30 s until power-down is complete.

Model 910 with engine 780.703
If high-voltage on-board electrical system is charged via a charging cable connector.

2

Disconnect charger from on-board electrical system battery.

When an external charger is connected.

3

Move driver seat to rearmost position.

4

Switch off ignition and store transmitter key outside of transmission range (min. 2  m).

 After the ignition has been switched off, a run-on time of approx. 2 min must be waited before disconnecting the ground line (1).

5

Remove trim (2).

6.1

Release electrical connector (3) (arrow A) and disconnect in direction of arrow (arrow B) with ground line (1).

Model 907, 910
with code E30 (Battery master switch)

 Removal: Position the ground line (1) so that there is no inadvertent contact with vehicle ground.

6.2

Remove nut (4) and remove ground line (1).

Model 907, 910
except code E30 (Battery master switch)

 Removal: Position the ground line (1) so that there is no inadvertent contact with vehicle ground.

 Nut, ground line to body

*BA54.10-N-1003-01TS



Check

7

Check for absence of voltage on 12 V on-board electrical system.

Model 910
with code ME0 (Electric motor 85 kW)



Service Information: Determine absence of voltage of 12 V on-board electrical system after removing the ground or positive line of the on-board electrical system battery

SI54.10-S-0072A



000 588 07 19 00 Measuring instrument

WS54.00-N-3005B

 The engine hood must be closed. Observe the Service Information.

8.1

Expose fuse holder at driver's seat and remove fuse F32 at fuse slot 32 of driver's seat fuse holder.

Model 907
with code G42 (7G-TRONIC PLUS)
Model 907
with code G43 (9G-TRONIC)
If the vehicle is to remain unused for more than 20 days.



Assignment of fuse holders on seat base

GF54.15-D-1257-11TSA


If the vehicle is to remain unused for longer than 20 days, remove fuse F32.
Otherwise the Emergency-P battery will be discharged and destroyed through deep discharging.

 Installation: When commissioning the vehicle, make sure that an intact 10 A fuse F32 is installed again in fuse slot 32 of the driver's seat fuse holder.

8.2

Expose fuse and relay module on front passenger side then remove fuse F30-6 from fuse slot 6 of plug S16 on front passenger side fuse and relay module.

Model 910 with engine 780.703
If the vehicle is to remain unused for more than 20 days.

Remove/install vehicle tool kit carrier plate

AR68.30-D-5021TS



Assignment of passenger-side footwell fuse and relay module

GF54.15-D-1256-28TSA


If the vehicle is to remain unused for longer than 20 days, remove fuse F30-6.
Otherwise the Emergency-P battery will be discharged and destroyed through deep discharging.

 Installation: When commissioning the vehicle, make sure that an intact 10 A fuse F30-6 is inserted into fuse slot 6 of the plug S16 on the passenger-side fuse and relay module.

9

Install in the reverse order.

Adjust

10

Set time and date in instrument cluster.

11

Adjust weekday, time and default value of operating time on warm air stationary heater switch clock.

Model 907.6/7
with code H11 (Auxiliary hot-air heater)

 See Owner's Manual.

 Battery

Number

Designation

Model 907

Model 910

BA54.10-N-1003-01TS

Nut, ground line to body

Nm

20

20