Remove/install additional battery for ECO start/stop function

AR54.10-S-0111E

Remove/install additional battery for ECO start/stop function

21.06.2017

Model

447

with code MJ8 (ECO start/stop function)

except code D50 (Full-length partition)

except code D51 (Entire partition with 1 window)

except code S23 (Co-driver's seat double seat)

Model

448

Modification notes

21.06.2017

Repair method modified.

All operation steps.

09.03.2020

Screw/bolt, seat console to body

BA91.10-N-1003-01J

1

Rear cover

4

Stowage compartment

7

Bolts

2

Seat base

5

Floor covering

8

Wooden block

3

Cover

6

Bolts

G1/12

Backup battery

5

Floor covering

13

Bracket

17

Electric line

9

Screw

14

Nut

18

Battery carrier

10

Ground cable

15

Screw

19

Vent hose

11

Electric line

16

Bus bar

G1/12

Backup battery

12

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

 Warning

Risk of injury caused by contact with battery gel when handling damaged lead-gelbatteries

No fires, sparks, open flames or smoking. Wear acid-resistant gloves, clothing and glasses.

AS54.10-Z-0001-02A

Topical note

Notes on carrying out repair work in the vehicle interior

AH68.00-N-0001-01S

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Topical note

Notes on battery

AH54.10-P-0001-01A

Notes on AGM battery

AH54.10-P-0002-01A

 

Remove/install

1

Switch off ignition and remove transmitter key

2

Move head restraint on right front seat all way down

3.1

Remove cover (3) at side from right seat base (2)

MODEL 447.6/7 , MODEL 448.7

3.2

Unclip and remove stowage compartment (4) at side of right seat base (2), starting at the top

Model 447.8 , model 448.8

 Long wedge

*115589035900

4

Remove screws (7)

 Screw/bolt, seat console to front reinforcement

*BA91.10-N-1004-01J

5

Remove rear cover (1) from right seat base (2)

6

Lift up floor covering (5) in area of bolts (6) and remove bolts (6)

 Screw/bolt, seat console to body

*BA91.10-N-1003-01J

7

Tilt seat base (2) with front seat mounted far enough forward until the backup battery (G1/12) is accessible, and support the seat base (2) using a suitable wooden block (8)

 Installation:
Make sure that no electric lines are jammed between the seat base (2) and body.
Otherwise, the electric lines will be damaged and the electrical system could be damaged.

8

Remove bolt (9) and disconnect ground line (10) together with electric line (11) from negative pole of backup battery (G1/12)

 Bolt, ground line to backup battery negative terminal

*BA54.10-N-1005-01F

9

Loosen nut (12) by several turns

 Do not completely unscrew nut (12).

10

Remove bracket (13)

 Installation: Check retaining tabs of bracket (13) are correctly seated in battery carrier (18) (arrows).

11

Loosen nut (14) by several turns

 Do not unscrew nut (14) completely.

 Nut, busbar to relay for backup battery

*BA54.10-N-1003-01F

12

Remove bolt (15) and disconnect bus bar (16) together with electric line (17) from positive pole of backup battery (G1/12)

 Bolt, busbar to backup battery positive terminal

*BA54.10-N-1004-01F

13

Press down floor covering (5) on left of support battery (G1/12) and slide support battery (G1/12) to left out of battery carrier (18) until vent hose (19) is accessible

14

Detach bleed hose (19) from backup battery (G1/12)

 Installation:
Check vent hose (19) is correctly seated on backup battery (G1/12).
Otherwise escaping battery acid mist can cause damage to the vehicle.

15

Remove backup battery (G1/12) from battery carrier (18)

16

Install in the reverse order

 Battery

Number

Designation

Model 447, 448

BA54.10-N-1003-01F

Nut, busbar to relay for backup battery

Nm

9

 Battery

Number

Designation

Model 447, 448

BA54.10-N-1004-01F

Bolt, busbar to backup battery positive terminal

Nm

5

 Battery

Number

Designation

Model 447, 448

BA54.10-N-1005-01F

Bolt, ground line to backup battery negative terminal

Nm

5

 Front seats

Number

Designation

Model 448

Model 447

BA91.10-N-1003-01J

Screw/bolt, seat console to body

Nm

60

60

 Front seats

Number

Designation

Model 448

Model 447

BA91.10-N-1004-01J

Screw/bolt, seat console to front reinforcement

Nm

38

38