Check high-voltage battery cooling system for leaktightness

AR20.00-P-1013MRD

Check high-voltage battery cooling system for leaktightness

12.12.2019

Engine

274.9 in model 213.050/053/054/153/155/253

1

Cap

2

Expansion reservoir

3

Tester cap

4

Pressure pump

 Warning

Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant.

Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers.
Wear protective gloves, protective clothing and safety glasses.

AS20.00-Z-0001-01A

Topical note

Notes on coolant

AH20.00-N-2080-01A

Notes on coolant level

AH20.00-P-1142-01CW



Check

1

Unscrew the cap (1) on the expansion reservoir (2)

2

Check coolant level and antifreeze content coolant

 Coolant mixing ratio

*BF20.00-P-1001-04A

3

Screw tester cap (3) onto expansion reservoir (2)

 Test cap

*210589009100

4

Connect pressure pump (4) with tester cap (3)

 Pressure pump

*124589242100

5

Apply a test pressure to the high-voltage battery cooling system for 2 minutes


Do not exceed the specified test pressure.
Otherwise damage can occur to the high-voltage battery cooling system.

 There should be no pressure drop within a period of 2 minutes.

Test pressure for pressure-testing the engine cooling system

*BE20.30-P-1005-01A

6

Check condition and coolant loss for all coolant carrying assembly parts and connections of the high-voltage battery cooling system and replace assembly parts if necessary

In the event of pressure drop.

7

Relieve test pressure over valve on pressure pump (4)

 Pressure pump

*124589242100

8

Disconnect pressure pump (4) from test connection (3)

9

Unscrew tester cap (3) from expansion reservoir (2)

 Test cap

*210589009100

10

Check coolant level and antifreeze content of coolant and correct if necessary

 Coolant mixing ratio

*BF20.00-P-1001-04A

11

Screw cap (1) onto expansion reservoir (2)

Radiator or expansion reservoir cap

Number

Designation

1-stage cover latch

Engine 100, 102, 103, 104, 110, 111, 112, 113, 114, 115, 116, 117, 119, 120, 121, 123, 127, 129, 130, 133, 137, 139, 152, 155, 156, 157, 159, 166, 180, 256, 260, 264, 266, 270, 271, 272, 273, 274, 275, 276, 277, 278, 279, 282, 285
2-stage latch cover
Engine 601, 602, 603, 604, 605, 606, 607, 608, 611, 612, 613, 615, 616, 617, 621, 626, 628, 629, 640, 642, 646, 648, 651, 654, 656, 668
2-stage latch cover

BE20.30-P-1005-01A

Test pressure for pressure-testing the engine cooling system

Overpressure

bar

1,4

1,4

 Coolant mixing ratio

Number

Designation

Engine all (4xWD, CAR, smart)

BF20.00-P-1001-04A

Coolant mixing ratio

Antifreeze/water

Up to -37°C

%

50/50

As of -38 °C

%

55/45

Overview and specifications sheet

BB00.40-P-0310-01A

References to sheet specification

BB00.40-P-0310ZZ