Drain, fill drive electric motor coolant

AR20.00-P-1143MEV

Drain, fill drive electric motor coolant

08.01.2020

Model

451.391/491 with engine 780.009

1

Cap

2

Radiator

3

Coolant drain plug

 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

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Drain off

1

Remove transmitter key and mains plug

2

Remove interior flap above engine

AR88.40-P-1100-03MCC

3

Turn cooling system cap (1) on expansion reservoir (2) a half turn counterclockwise, relieve the overpressure and then unscrew the cooling system cap (1)

 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

4

Raise vehicle with vehicle lift

5

Remove coolant drain plug (3) and catch coolant in a suitable container

Pour in

6

Screw in coolant drain plug (3) tightly

 Coolant drain plug to engine

*BA20.10-P-1006-01N

7

Lower vehicle with vehicle lift

8

Pour in coolant and bleed cooling system

AR20.00-P-1143-06MEV



Coolant specifications

BB00.40-P-0310-01A



Anticorrosion/antifreeze agents (Sheet 325.0)

BB00.40-P-0325-00A

 Pressure pump

*450589072100

 Filling device

*450589206300

Check

9

Check coolant level in cooler (2); correct if necessary



Coolant specifications

BB00.40-P-0310-01A



Anticorrosion/antifreeze agents (Sheet 325.0)

BB00.40-P-0325-00A

 The coolant level in cooler (2) must be filled until the maximum mark.

10

Seal cooler (2) with cap (1)

11

Lower vehicle with vehicle lift

12

Install interior flap above engine

AR88.40-P-1100-03MCC

 Coolant pump, coolant thermostat

Number

Designation

Engine 780.009

BA20.10-P-1006-01N

Coolant drain plug to engine

Nm

45