AR83.25-P-1000P Remove/Install Heater Housing

AR83.25-P-1000P Remove/Install Heater Housing
- except CODE (580a) Automatic air conditioning
- except CODE (581b) Convenience automatic air conditioning

Shown on Model 203.0:

Illustrated on model 203.0:

Shown on Model 203.0:

Shown on Model 203.0:

DANGER:
- Risk of injury to skin and eyes suffering scalding from contact with hot coolant spray. Risk of poisoning from swallowing coolant.
- Do not open cooling system unless coolant temperature is below 90 degrees C. Open cap slowly and release the pressure. Do not pour coolant into beverage bottles.
- Wear protective gloves, protective clothing and eye protection.

1 Open engine hood
2 Reduce pressure in cooling system
3.1 Detach lower engine compartment lining

NOTE: Front paneling.

3.2 Remove bottom section of sound-proofing capsule

NOTE: Front lower section.

4 Drain coolant at radiator

DANGER:
- Risk of explosion from gas. Risk of poisoning and caustic burns from swallowing battery electrolyte. Risk of injury with caustic burns to eyes and skin from battery electrolyte or from handling damaged lead-acid batteries.
- No fire, sparks, naked flames or smoking.
- Wear acid-resistant gloves, clothing and eye protection. Pour battery electrolyte only into suitable and appropriately marked containers.

5 Remove instrument panel carrier
6 Remove accelerator pedal
7 Fold back floor covering at front left

NOTE: Air duct to left rear compartment (14) must be accessible.

8 Remove air duct to left rear compartment (14)
9 Fold back floor covering at right front

NOTE: Air duct to right rear compartment (15) must be accessible.

10 Remove air duct to right rear compartment (15)
11 Remove hose clamp (3) from fitting
- Hose clamp pliers (length 210 mm; adjustment range 80 mm)
See "Commercially Available Tools" given below.

12 Remove hot water feed hose (4)

CAUTION: Plug opening.

- See "Special Tools" given below.

13 Remove hose clamp (5) from fitting
- Hose clamp pliers (length 210 mm; adjustment range 80 mm)
See "Commercially Available Tools" given below.

14 Remove hot water return hose (6)

CAUTION: Plug opening.

- See "Special Tools" given below.

15 Slightly remove heater housing from firewall

CAUTION: Installation: Moisten seal (11) on heater housing air inlet with soap solution.

- Do not oil seal. Ensure that seal (11) on heater housing air inlet is seated properly.
- Grease guides (12).
- MB long-term grease

16 Remove cockpit wiring harness (9) from heater housing
17 Remove heater housing

CAUTION: Remove heater housing with aid of helper. Avoid damaging passenger compartment and heater housing.

18 Install in the reverse order
19 Read diagnostic trouble code memory and erase
20 Synchronize actuator motors.

Special Tools

Set of Plugs, P/N# 129 589 00 91 00:

Commercially Available Tools

Commercially Available Tools: