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

AR83.60-S-0013E

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

27.04.2020

Model

447.7/8

with code H13 (Additional heat exchanger)

Model

447.7/8

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

Model

448

Shown on model 447 with engine 651 with HZ7 (semi-automatically controlled air conditioning, TEMPMATIC in rear passenger compartment)

1

Front feed hose

4

Rear feed hose

6

Coolant feed line

2

Front return hose

5

Nut

7

Coolant return flow line

3

Rear return hose

 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.Typ 447.8 mit Motor 780.702

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

Notes on carrying out repair work in the vehicle interior

AH68.00-N-0001-01S

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

 

Remove/install

1.1

Drain off coolant.

Model 447.7 with engine 622, model 447.7/8 with engine 274, 651, 654.9 model 448

Model 447.7/8 with engine 654.9

AR20.00-S-1142E

Model 447.7 with engine 622.8

AR20.00-S-1142EH

Model 447.7 with engine 622.9, model 447.7/8 with engine 274, 651, model 448 with engine 274

AR20.00-S-1140E

1.2

Remove high-voltage battery

Model 447.8 with engine 780.702
* Applies to Europe only

AR47.70-S-0002G

2

Remove left underfloor paneling.

Model 447.7/8 with engine 651 with code MX0 (BlueEFFICIENCY package), model 447.7/8 with engine 654.9

AR61.30-S-1001E

Model 447.7 with engine 622.8

AR61.30-S-1001EH

3

Remove front feed hose (1) from coolant feed line (6) and front return hose (2) from coolant return flow line (7).

AR83.60-S-0012E

4

Remove rear return hose (3) from coolant return flow line (7) and rear feed hose (4) from coolant feed line (6).

AR83.60-S-0010E

5

Remove nuts (5).

 Aid of helper required.
The number of nuts (5) may vary depending on the vehicle variant.

6

Remove coolant return flow line (7) and coolant feed line (6).

 Aid of helper required.

7

Install in the reverse order.