Remove/install coolant lines of heating system to firewall for heater in rear passenger compartment

AR83.60-S-0014E

Remove/install coolant lines of heating system to firewall for heater in rear passenger compartment

30.04.2020

Model

447.8 with engine 780.702

with code HZ7 (TEMPMATIC semi-automatic air conditioning in rear)

1

Coolant lines

2

Screw

3

Nut

 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 vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system as well as personal protective equipment

AH00.00-Z-0300-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

Topical note

Special instructions for lifting and supporting vehicle

AH00.60-N-0100-01A

 

Remove/install

1

Remove integral carrier.

AR31.35-S-0001G

2

Remove front feed hose from coolant lines (1).

AR83.60-S-0012E

3

Remove bolt (2).

4

Remove nut (3).

5

Remove coolant lines (1) downwards.

 To do so, remove feed and return hose at top.
Collect coolant which flows out.

 Commercially available devices/tools
Collecting pan

 Installation: Check clamps for damage.

 Hose clamp pliers

*454589003700

If damage is present,



replace affected clamp.

6

Install in the reverse order.