Drain/pour in coolant

AR20.00-P-1142EL

Drain/pour in coolant

02.12.2019

Engine

157, 276, 278 in model 212, 218

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

2

Cap

3

Drain hose

3a

Fitting

4

Coolant expansion reservoir

6

Radiator

7

Drain screw

Shown on engine 276 except code ME04 (Mild HYBRID drive)

1

Coolant pump

3

Drain hose

5

Drain screw

 Danger

Risk of death caused by vehicle slipping or toppling off of the lifting platform.

Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.

AS00.00-Z-0010-01A

 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

Drain off

1

Perform enable for the high voltage on-board electrical system

Engine 276 in model 212
with code ME04 (Mild hybrid drive)

AR54.10-P-1150EH

2

Unscrew cap (2) on coolant expansion reservoir (4)

 Unscrew cap (2) slowly and relieve overpressure.

3

Remove lower engine compartment paneling

AR61.20-P-1105EW

4

Push drain hose (3) onto left fitting (3a) on radiator (6)

5

Unfasten drain screw (7) at radiator (6) and drain coolant


Remove drain screw (7) only until the coolant flows off.
The drain screw (7) can be permanently damaged otherwise.

 Collect coolant in a suitable container.

 Observe regulations to dispose of coolant.

6

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

Engine 157, 278 in model 212, 218
Engine 276 in model 212
with code ME04 (Mild hybrid drive)

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

7

Protect power electronics control unit from escaping coolant

Engine 276 in model 212
with code ME04 (Mild hybrid drive)

8

Loosen drain screw (5)

Engine 276 in model 212, 218

 Drain screw on coolant pump

*BA20.10-P-1008-01AA

9

Push drain hose (3) onto drain screw (5)

Engine 276 in model 212, 218

10

Further turn drain screw (5) and drain off coolant

Engine 276 in model 212, 218

Pour in

11

Tighten drain screw (7) on cooler (6) and detach drain hose (3) from fitting (3a)

12

Tighten drain screw (5) at drain screw and detach drain hose (3) from fitting (3a)

Engine 276 in model 212, 218

13

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

 Re-use clean coolant.

 Coolant mixing ratio

*BF20.00-P-1001-04A

 Cooler vacuum filling device

*285589002100

 Test cap

*210589009100

 NTKL Adaption

*285589012100

 Electric vacuum pump

*285589022100

14

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

Engine 276 in model 212
with code ME04 (Mild hybrid drive)

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



Check

15

Check engine cooling system for leaktightness

AR20.00-P-1010EL

16

Install lower engine compartment paneling

AR61.20-P-1105EW

17

Perform high voltage on-board electrical system commissioning

Engine 276 in model 212
with code ME04 (Mild hybrid drive)

AR54.10-P-1150EH

 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

18

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

 Coolant pump, coolant thermostat

Number

Designation

Engine 276

BA20.10-P-1008-01AA

Drain screw on coolant pump

Stage 1

Nm

6

Stage 2

°

90

 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