Heating, air conditioner

Chapter overview

• Technical data
  1
• 1 Safety information
  1
• 1.1 Safety precautions when working on air conditioning systems
  1
• 1.2 Safety precautions when handling refrigerants
  1
• 1.3 Safety measures when working on vehicles with a start/stop system
  2
• 1.4 Safety precautions when working in the vicinity of high-voltage components
  2
• 2 General information
  3
• 2.1 Notes concerning odours in air conditioned vehicles
  3
• 2.2 Type plates
  3
• 3 Repair notes
  5
• 3.1 Working on refrigerant circuit
  5
• 3.2 General repair instructions
  5
• 3.3 Refrigerant circuit seals
  5
• 4 Technical data
  7
• 4.1 Refrigerant capacity
  7
• 4.2 Refrigerant oil capacities
  7
• 4.3 Oil distribution
  8
• Heating
  9
• 1 Overview of fitting locations - heating
  9
• 1.1 Overview of fitting locations - components not located in passenger compartment
  9
• 2 Actuators
  13
• 2.1 Removing and installing temperature flap actuator
  13
• 2.2 Removing and installing defroster and air distribution flap actuator
  13
• 2.3 Removing and installing flexible shaft for air distribution
  13
• 2.4 Removing and installing flexible shaft for temperature flap
  13
• 3 Heater
  14
• 3.1 Assembly overview – heater unit
  14
• 3.2 Removing and installing fresh air blower V2
  15
• 3.3 Removing and installing fresh air blower series resistor with overheating fuse N24
  15
• 3.4 Removing and installing heat exchanger
  15
• 3.5 Removing and installing heater unit
  15
• 3.6 Dismantling and assembling heater unit
  15
• 4 Air duct
  16
• 4.1 Assembly overview - air duct and air distribution in passenger compartment
  16
• 4.2 Removing and installing centre vent
  16
• 4.3 Removing vents on driver side or front passenger side
  16
• 4.4 Removing and installing footwell vent on driver side or front passenger side
  16
• 4.5 Removing and installing intermediate piece for defroster vent
  16
• 4.6 Removing and installing intermediate piece for centre vent
  16
• 4.7 Removing and installing fresh air intake
  16
• 4.8 Removing and installing forced ventilation for passenger compartment
  17
• 4.9 Checking forced ventilation for passenger compartment
  17
• 5 Operating and display unit
  18
• 5.1 Overview of operating and display unit
  18
• 5.2 Removing and installing operating and display unit
  18
• 5.3 Multi-pin connector pin assignment on back of operating and display unit
  18
• 6 Other controlling and regulating components
  20
• 6.1 Removing and installing ambient temperature sensor G17
  20
• Air conditioning system
  21
• 1 Overview of fitting locations - air conditioning system
  21
• 1.1 Overview of fitting locations - components not located in passenger compartment
  21
• 2 Refrigerant circuit
  26
• 2.1 System overview - refrigerant circuit
  26
• 2.2 Removing and installing high-pressure sender G65
  28
• 2.3 Removing and installing expansion valve
  30
• 2.4 Removing and installing condenser
  33
• 2.5 Removing and installing desiccant bag or cartridge
  37
• 2.7 Commissioning air conditioning system after filling refrigerant circuit
  45
• 2.8 Removing and installing refrigerant line between condenser and evaporator
  46
• 3 Air conditioner compressor
  62
• 3.1 Assembly overview - drive unit of air conditioner compressor
  62
• 3.2 Assembly overview - pulley
  63
• 3.3 Removing air conditioning compressor from and installing on bracket
  64
• 3.4 Removing and installing air conditioner compressor
  69
• 3.5 Removing and installing air conditioning system magnetic clutch N25
  77
• 4 Control motors/actuators
  80
• 4.1 Overview of fitting locations – front control motors
  80
• 4.2 Removing and installing temperature flap control motor V68
  82
• 4.3 Removing and installing centre flap control motor V70
  85
• 4.4 Removing and installing air flow flap control motor V71
  87
• 4.5 Removing and installing defroster flap control motor V107
  90
• 4.6 Removing and installing temperature flap actuator
  93
• 4.7 Removing and installing fresh air/recirculated air flap actuator
  96
• 4.8 Removing and installing flexible shaft for air distribution
  98
• 4.9 Removing and installing flexible shaft for temperature flap
  99
• 4.10 Removing and installing fresh air/recirculated air flap cable
  99
• 5 Front heater and air conditioning unit
  101
• 5.2 Assembly overview – evaporator housing
  110
• 5.3 Removing and installing evaporator
  112
• 5.4 Removing and installing evaporator temperature sensor G308
  119
• 5.5 Removing and installing heater and air conditioning unit
  120
• 5.6 Dismantling and assembling heater and air conditioning unit
  131
• 5.7 Removing and installing dust and pollen filter
  133
• 5.8 Removing and installing fresh air blower V2
  134
• 5.9 Removing and installing fresh air blower series resistor with overheating fuse N24
  138
• 5.10 Removing and installing fresh air blower control unit J126
  139
• 5.11 Removing and installing heat exchanger
  142
• 5.12 Removing and installing condensation drain
  144
• 5.13 Checking condensation drain
  144
• 6 Air duct
  146
• 6.1 Assembly overview - air duct and air distribution in passenger compartment
  146
• 6.2 Removing and installing centre vent
  147
• 6.3 Removing and installing defroster vent
  147
• 6.4 Removing and installing dash panel vent, side
  148
• 6.5 Removing and installing right or left vent
  148
• 6.6 Removing and installing air duct for defroster vent
  148
• 6.7 Removing and installing air duct for centre dash panel vent
  149
• 6.8 Removing and installing right or left footwell vent
  150
• 6.9 Checking forced ventilation for passenger compartment
  150
• 6.10 Removing and installing forced ventilation for passenger compartment
  150
• 6.11 Removing and installing fresh air intake
  151
• 7 Operating and display unit
  154
• 7.1 Overview of operating and display unit
  154
• 7.2 Removing and installing operating and display unit
  157
• 8 Other controlling and regulating components
  161
• 8.1 Removing and installing ambient temperature sensor G17
  161
• 8.2 Removing and installing sunlight penetration photosensor G107
  161
• 8.3 Removing and installing humidity sender for air conditioning system G260
  162
• 8.4 Repairing humidity sender for air conditioning system G260
  165
• 8.5 Removing and installing centre vent temperature sender G191
  166
• 8.6 Removing and installing footwell vent temperature sender G192
  167