Drain/pour in coolant

AR20.00-P-1142EH

Drain/pour in coolant

02.12.2019

Engine

651.9 in model 212.098/298

Modification notes

12.02.2014

Work procedure altered and special tools for electrical vacuum pump and NTKL adaptation, added.

Operation steps 14 to 26

AR20.00-P-1142-04A

26.09.2014

Mixing ratio for coolant

BF20.00-P-1001-04A

1

Air filter housing bracket

5

Cap

9

Radiator

2

Electrical connector

6

Coolant expansion reservoir

10

Drain screw for radiator

3

Electrical line

7

Drain hose

11

Crankcase drain screw

4

Heat shield

8

Fitting on radiator

 Danger

Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)

Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines.

AS00.00-Z-0035-01A

 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

General information on handling vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system

AH00.00-Z-0300-01A

Topical note

Notes on coolant

AH20.00-N-2080-01A

Notes on coolant level

AH20.00-P-1142-01CW



Remove

1

Perform enable for the high voltage on-board electrical system

AR54.10-P-1150EH

2

Remove DPF differential pressure sensor from air filter housing holder (1)

AR07.04-P-0012CD

 Do not remove the DPF differential pressure sensor from the pressure lines for the CAT diesel particulate filter unit.

3

Unclip electrical connection (2) from holder

4

Disconnect electrical connection (2)

5

Remove electrical line (3) on air filter housing bracket (1)

6

Unscrew cap (5) from coolant expansion reservoir (6)

 Unscrew cap (5) slowly and relieve overpressure.

7

Remove bottom section of soundproofing

AR94.30-P-5300EW

8

Remove catalytic converter diesel particulate filter unit

AR49.10-P-5501CD

9

Remove heat shield (4)

Drain coolant at crankcase

10

Protect power electronics control unit and electrical line of high voltage on-board electrical system against escaping coolant

11

Push drain hose (7) onto crankcase drain screw (11)

12

Loosen crankcase drain screw (11) and drain off coolant

 Collect coolant in a suitable container.

 Observe regulations to dispose of coolant.

13

Tighten crankcase drain screw (11) and detach drain hose (7)

 Coolant drain plug on crankcase

*BA20.00-P-1001-02A

Drain off coolant from cooler (9)

14

Push drain hose (7) onto fitting on the radiator (8)

15

Unfasten radiator drain screw (10) at radiator (9) and drain off coolant


Only remove radiator drain screw (10) until coolant flows out.
The radiator drain screw (10) can be permanently damaged otherwise.

 Collect coolant in a suitable container.

 Observe regulations to dispose of coolant.

16

Switch on ignition for about 5 seconds and then switch off again

 Repeat process x 2 after a waiting time of approx. 30 s to thus empty low-temperature coolant circuit.

17

Tighten down radiator drain screw (10) and pull out drain hose (7)

Pour in

18

Pour in coolant and ventilate engine cooling system

AR20.00-P-1142-04A



Anticorrosion/antifreeze agents (Sheet 325.0)

BB00.40-P-0325-00A



Coolant specifications

BB00.40-P-0310-01A

 Use clean coolant again.

 Coolant mixing ratio

*BF20.00-P-1001-04A

 NTKL Adaption

*285589012100

 Electric vacuum pump

*285589022100

 Test cap

*210589009100

 Cooler vacuum filling device

*285589002100

19

Switch on ignition for about 5 seconds and then switch off again

 Repeat process x 2 after a waiting time of approx. 30 s to thus fill and bleed low-temperature coolant circuit.



Install

20

Check engine cooling system for leaktightness

AR20.00-P-1010OMA

21

Install heat shield (4)

22

Install catalytic converter diesel particulate filter unit

AR49.10-P-5501CD

23

Install bottom section of soundproofing

AR94.30-P-5300EW

24

Contact the electrical connection (2), clip into the holder and attach electrical line (3) to air filter housing holder (1)

25

Remove DPF differential pressure sensor from air filter housing holder (1)

AR07.04-P-0012CD

26

Perform high voltage on-board electrical system commissioning

AR54.10-P-1150EH



Check

 Warning

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

27

Perform an engine test run and check engine cooling system for proper operation

 Engine cooling, general

Number

Designation

Engine 651

BA20.00-P-1001-02A

Coolant drain plug on crankcase

Nm

12

 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