Check condition of battery

AR54.10-D-1129TS

Check condition of battery

13.02.2020

Model

907, 910

Modification notes

12.02.2020

Change of test method of auxiliary battery for park pawl emergency shift mode.

Step 5

 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

Notes on battery

AH54.10-P-0001-01A



Remove

1

Remove battery to be checked.

Remove on-board electrical system battery
Model 907

AR54.10-D-0009TSR

Remove on-board electrical system battery Model 910

AR54.10-D-0009TSF

Remove the auxiliary battery Model 907, 910
with code E2I (Auxiliary battery for retrofitted consumers, interior)

AR54.10-D-0007TS

Remove auxiliary battery in engine compartment Model 907
with code E2M (Auxiliary battery for retrofit consumers, engine compartment)

AR54.10-D-0024TS

Remove additional battery for emergency shift park pawl Model 907
with code G42 (7G-TRONIC PLUS)
Model 907
with code G43 (9G-TRONIC)
Model 910 with engine 780.703

AR54.10-D-0120TSR



Check

2

Check battery for external leakage or damage via visual check.

If a leakage or any damage is detected,



replace battery and dispose of properly and in environmentally-compatible manner.

3

Check on-board electrical system battery using battery test device.

When checking the on-board electrical system battery.

AR54.10-D-1129-01TS



000 588 02 19 00 Battery tester

WS54.00-N-3006B

4

Check auxiliary battery of vehicle interior or engine compartment using battery test device.

Model 907, 910
with code E2I (Auxiliary battery for retrofitted consumers, interior)
Model 907
with code E2M (Auxiliary battery for retrofit consumers, engine compartment)
When checking the auxiliary battery of vehicle interior or engine compartment.

AR54.10-D-1129-01TS



000 588 02 19 00 Battery tester

WS54.00-N-3006B

5

Check auxiliary battery for park pawl emergency shift mode.

When checking the auxiliary battery for park pawl emergency shift mode.



Service Information: Testing method for additional battery for park pawl emergency shift mode

Model 907
with code G42 (7G-TRONIC PLUS)
Model 907
with code G43 (9G-TRONIC)
Model 910 with engine 780.703

SI54.10-S-0050A

6

Reduce increased voltage of on-board electrical system battery.

When checking the on-board electrical system battery, if the message "Surface voltage detected" is shown on the battery test device display.

AR54.10-D-1129-03TS



000 588 03 19 00 Load tester

WS15.00-P-0027B

7

Reduce increased voltage of auxiliary battery of vehicle interior or engine compartment after charging process.

Model 907, 910
with code E2I (Auxiliary battery for retrofitted consumers, interior)
Model 907
with code E2M (Auxiliary battery for retrofit consumers, engine compartment)
When checking the auxiliary battery of vehicle interior or engine compartment, if the message "Surface voltage detected" is shown on the battery test device display.

AR54.10-D-1129-03TS



000 588 03 19 00 Load tester

WS15.00-P-0027B

8

Check on-board electrical system battery again using battery test device.

When checking the on-board electrical system battery, if an increased voltage was reduced after the charging process.

AR54.10-D-1129-01TS



000 588 02 19 00 Battery tester

WS54.00-N-3006B

9

Check auxiliary battery of vehicle interior or engine compartment again using battery test device.

Model 907, 910
with code E2I (Auxiliary battery for retrofitted consumers, interior)
Model 907
with code E2M (Auxiliary battery for retrofit consumers, engine compartment)
When checking the auxiliary battery of vehicle interior or engine compartment, if an increased voltage was reduced after the charging process.

AR54.10-D-1129-01TS



000 588 02 19 00 Battery tester

WS54.00-N-3006B

10

Charge on-board electrical system battery.

When checking the on-board electrical system battery, if the "Charge and check" message is shown on the battery test device display.

AR54.10-D-1130TS

11

Charge auxiliary battery of vehicle interior or engine compartment.

Model 907, 910
with code E2I (Auxiliary battery for retrofitted consumers, interior)
Model 907
with code E2M (Auxiliary battery for retrofit consumers, engine compartment)
After checking the auxiliary battery of vehicle interior or engine compartment, if the message "Charge and check" is shown on the battery test device display.

AR54.10-D-1130TS

12

Fill out test sheet.



Test sheet for on-board electrical system batteries, starter batteries and support batteries, form

OF54.10-P-3000-02B



Install

13

Install corresponding battery.

Install on-board electrical system battery
Model 907

AR54.10-D-0009TSR

Install on-board electrical system battery Model 910

AR54.10-D-0009TSF

Install additional battery Model 907, 910
with code E2I (Auxiliary battery for retrofitted consumers, interior)

AR54.10-D-0007TS

Install auxiliary battery in engine compartment Model 907
with code E2M (Auxiliary battery for retrofit consumers, engine compartment)

AR54.10-D-0024TS

Install additional battery for emergency shift park pawl Model 907
with code G42 (7G-TRONIC PLUS)
Model 907
with code G43 (9G-TRONIC)
Model 910 with engine 780.703

AR54.10-D-0120TSR

 The batteries must never be mixed up.