Servicing heating system

Note:

Before disconnecting battery, obtain radio code for radios with anti-theft coding.

• Plenum chamber cover left
• Joining piece
• Plenum chamber cover right
• ◆ Removing and installing => Fig.5

• Intake housing
• ◆ Removing and installing dust and pollen filter (Vehicles up to vehicle identity No. 1H-P-990 000) => Fig.6
• ◆ Removing and installing dust and pollen filter (Vehicles from vehicle identity No. 1H-R-000 001) => Fig. 7
• Right side window vent
• Right vent
• ◆ Replacing:
• ‒ The glued-on seal is to be removed from the replacement part if a seal is already installed on air guide (under dash panel).
• Central vent
• ◆ Replacing:
• ‒ The glued-on seal is to be removed from the replacement part if a seal is already installed on air guide (under dash panel).

• Cover
• Hexagon nut
• Series resistance for fresh air blower with overheating fuse -N24-
• ◆ Removing and installing => Fig.1
• Fresh air blower -V2-
• ◆ Removing => Fig.2
• Control panel trim
• Fillister head self-tapping screw
• Footwell vent
• ◆ Replacing: Remove centre console
• Right joining piece
• Fillister head self-tapping screw
• Self-tapping screw

• Right rear duct
• Left rear duct
• Left joining piece
• Clip
• Cables
• ◆ Removing and installing
• Fresh air and heated air controls
• ◆ Removing and installing => Fig.3
• ◆ Dismantling and assembling => Page 80-20
• ◆ Installing and adjusting cables => Page 80-15

• Heater
• ◆ Renewing:
• ‒ Removing and installing dash panel

=> General body repairs; Repair Group 70; Removing and installing dash panel

• ‒ Remove carrier
• ‒ Seal heat exchanger to prevent coolant from running out
• ‒ Remove heater unit
• ◆ Dismantling and assembling heater unit => Page 80-11

• Heat exchanger
• ◆ Renewing: Remove dash panel and heater unit
• ◆ Installing: => Page 80-11 dismantling and assembling heater
• ◆ After removal renew complete coolant

• Right vent
• ◆ Removing and installing => Fig.4
• ◆ Replacing:
• ‒ The glued-on seal is to be removed from the replacement part if a seal is already installed on air guide (under dash panel).
• Left side window vent
• Dash panel
• ◆ Do not dismantle further
• ◆ Removing and installing

=> General body repairs; Repair Group 70; Removing and installing dash panel

→ Fig.1     Removing fresh air blower series resistance with overheating fuse -N24-

• ‒ Pull off connectors.
• ‒ Press retainers on sides and pull out series resistance.

Note:

If retainers on the sides do not engage when installing, the series resistance can be secured using a self-tapping screw (arrow).

→ Fig.2     Removing fresh air blower -V2-

• ‒ Pull connector -1- off series resistance.
• ‒ Release retainer -3- and turn fresh air blower -2- in direction of arrow and remove.

→ Fig.3     Removing and installing fresh and heated air control unit

Removing

• ‒ Pull off heating control trim panel -3-.
• ‒ Remove instrument panel screws -2-.
• ‒ Pull controls -1- with cables attached out of dash panel.

Installing

• ‒ Secure cables to removed controls.

→ Fig.4     Removing and installing vent

• ‒ Remove lighting switch.
• ‒ Pull grill -2- out carefully with pointed pliers.
• ‒ Remove vent housing -1-.

→ Fig.5     Removing and installing right-hand side plenum chamber cover

•      1 -     Plenum chamber cover, right
•      2 -     Adapter
•      3 -     Plastic screw
•      4 -     Clip
•      5 -     Connector

→ Fig.6     Removing and installing dust and pollen filter (vehicles up to vehicle identity No. 1H-P-990 000)

• ◆ Optional extra

•      1 -     Filter element
•      2 -     Plastic nut
•      3 -     Filter housing
•      4 -     Gasket

Note:

If the filter element is to be changed then additionally remove the housing and install the dust and pollen filter for vehicles from vehicle identity No. 1H-R-000 001 (=> Fig.7 ).

→ Fig.7     Removing and installing dust and pollen filter (vehicles from vehicle identity No. 1H-R-000 001)

•      1 -     Frame
•      2 -     Filter element
•      3 -     Plastic nut
•      4 -     Filter housing with seal

Removing

• ‒ Press filter housing clips in direction of arrow -B- and remove filter element with frame.

Installing

• ‒ The frame must engage in the first lamination of the filter element -arrow A-.