Check condition of battery

AR54.10-P-1129AK

Check condition of battery

20.01.2020

Model

169, 245 (except 245.286)

Modification notes

10.05.2019

Battery capacity 70 Ah VRLA/AGM

BE54.10-P-1010-01A

Shown on model 245

3

Quick-release coupling

4

Cover

G1

Battery

Shown on vehicles with code (B01) ECO start/stop function

1

Cover

2

Right side trunk lining

G1/7

Additional battery



Remove

 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

1.1

Remove cover (4) and remove insulation mat over battery (G1)

For checking battery (G1) except on model 169.090.

 To remove the cover (4), turn the quick-release fastener (3) counterclockwise.

1.2

Open hood

Model 169.090

 To check the battery (G1)

2

Open cover (1) of right side trunk lining (2)

To check the auxiliary battery (G1/7) on vehicles with code B01 (ECO start/stop function).



Check

3

Visual inspection of battery (G1) for external leakage

 If leaks are found, replace battery (G1).

Refer to:



Remove/install battery (G1)

AR54.10-P-0005AK

 Dispose of defective battery properly and in an environmentally compatible manner.

4

Visual inspection of auxiliary battery (G1/7) for external leakage

For vehicles with CODE B01 (ECO start/stop function)

 If leaks are found, replace auxiliary battery (G1/7).

 Dispose of defective battery properly and in an environmentally compatible manner.

Refer to:



Remove/install auxiliary battery (G1/7)

Model 169.0/3, 245.2 (except 245.286)
with code B01 (ECO start/stop function)

AR54.10-P-0007AK

5

Check fluid level of battery (G1)

Not with absorbent glass mat battery.

 On battery (G1) without service fill level indicator: Refill distilled water, if necessary.
Battery (G1) with service fill level indicator:

If the service fill level indicator is a white color, the acid level is too low: Replace battery (G1), see:



Remove/install battery

AR54.10-P-0005AK

 Dispose of defective battery properly and in an environmentally compatible manner.

6

Check battery (G1) or auxiliary battery (G1/7)

AR54.10-P-1129-01A

 Cold cranking amps

Battery capacity 12 Ah

*BE54.10-P-1001-01A

Battery capacity 46 Ah

*BE54.10-P-1005-01A

Battery capacity 62 Ah

*BE54.10-P-1009-01A

Battery capacity 70 Ah VRLA/AGM

*BE54.10-P-1010-01A

Battery capacity 74 Ah

*BE54.10-P-1011-01A

7

Reduce increased voltage after charging process

For a battery (G1) or auxiliary battery (/G17) that is disconnected from the on-board electrical system and for a "Surface voltage" message in the display of the Midtronics battery tester.

AR54.10-P-1129-03A

 After removing increased voltage, check battery (G1) or auxiliary battery (G1/7) again.

 Commercially available devices/tools
Battery tester/test equipment

8

Charge battery (G1) or auxiliary battery (G1/7)

With test code "Charge and check" of Midtronics battery tester/test equipment.

AR54.10-P-1130AK

 After charging, check battery (G1) or auxiliary battery (G1/7) again.



Install

9.1

Insert insulation mat and install cover (4)

After checking battery (G1) except on model 169.090.

9.2

Close engine hood

After checking battery (G1) only on model 169.090.

10

Close cover (1) on right side trunk lining (2)

After checking the auxiliary battery (G1/7) on vehicles with code B01 (ECO start/stop function).

Test and adjustment values for battery

Number

Designation

Model all (4xWD, CAR, smart)

BE54.10-P-1001-01A

Battery capacity 12 Ah

Cold cranking amps

As per EN

A

170

Test and adjustment values for battery

Number

Designation

Model all (4xWD, CAR, smart)

BE54.10-P-1005-01A

Battery capacity 46 Ah

Battery test at 20 °C

Acid density

kg/dm3

1,24

Maximum permissible difference between individual battery cells

kg/dm3

0,04

Load current

A

140

Load time

s

10

Voltage

V

10

Cold cranking amps

As per EN

A

420

Test and adjustment values for battery

Number

Designation

Model all (4xWD, CAR, smart)

BE54.10-P-1009-01A

Battery capacity 62 Ah

Battery test at 20 °C

Acid density

kg/dm3

1,24

Maximum permissible difference between individual battery cells

kg/dm3

0,04

Load current

A

190

Load time

s

10

Voltage

V

10

Cold cranking amps

As per EN

A

480

Test and adjustment values for battery

Number

Designation

Model all (4xWD, CAR, smart)

BE54.10-P-1010-01A

Battery capacity 70 Ah VRLA/AGM

Cold cranking amps

As per EN

A

720

Test and adjustment values for battery

Number

Designation

Model all (4xWD, CAR, smart)

BE54.10-P-1011-01A

Battery capacity 74 Ah

Battery test at 20 °C

Acid density

kg/dm3

1,24

Maximum permissible difference between individual battery cells

kg/dm3

0,04

Load current

A

265

Load time

s

10

Voltage

V

10

Cold cranking amps

As per EN

A

680