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 on high-voltage system
  2
• 1.5 Safety precautions when working in the vicinity of high-voltage components
  3
• 1.6 Safety precautions when working on the cooling system
  3
• 1.7 Safety precautions for working on vehicles with auxiliary/supplementary heater
  4
• 2 General information
  5
• 2.1 Notes concerning odours in air conditioned vehicles
  5
• 2.2 Notes for vehicles with start-stop system
  5
• 3 Repair notes
  6
• 3.1 Working on refrigerant circuit
  6
• 3.2 General repair instructions
  6
• 3.3 Refrigerant circuit seals
  6
• 4 Technical data
  8
• 4.1 Refrigerant capacity
  8
• 4.2 Refrigerant oil
  8
• 4.3 Oil distribution
  9
• Heating
  10
• 1 Heating system
  10
• Air conditioning system
  11
• 1 Overview of fitting locations - air conditioning system
  11
• 1.1 Overview of fitting locations - components not located in passenger compartment
  11
• 2 Refrigerant circuit
  13
• 2.1 System overview - refrigerant circuit
  13
• 2.3 Removing and installing desiccant bag or cartridge
  20
• 2.4 Notes on installing air conditioner compressor
  24
• 2.5 Removing and installing high-pressure sender G65
  25
• 2.6 Removing and installing expansion valve
  27
• 2.7 Removing and installing condenser
  33
• 3 Air conditioner compressor
  48
• 3.1 Removing and installing air conditioner compressor
  48
• 3.2 Checking high-pressure safety valve on air conditioner compressor
  72
• 3.3 Removing and installing drive plate with overload protection
  72
• 3.4 Checking and adjusting true running of drive plate with overload protection
  73
• 3.5 Removing and installing air conditioner compressor drive plate
  74
• 3.6 Conversion from Hardy disc to Gates coupling
  75
• 3.7 Removing and installing mounting with freewheel on air conditioner compressor
  77
• 4 Control motors
  80
• 4.1 Renewing control motors on heater and air conditioner unit
  80
• 4.2 Overview of control motors on heater and air conditioner unit
  81
• 4.3 Removing and installing defroster flap control motor V107
  82
• 4.4 Removing and installing left side vent control motor V299
  83
• 4.5 Removing and installing left centre vent control motor V110
  83
• 4.6 Removing and installing left footwell flap control motor V108
  84
• 4.7 Removing and installing left temperature flap control motor V158
  85
• 4.8 Removing and installing right temperature flap control motor V159
  85
• 4.9 Removing and installing fresh air/air recirculation, air flow flap control motor V425
  86
• 4.10 Removing and installing indirect ventilation flap control motor V213
  86
• 4.11 Removing and installing control motor for right indirect ventilation flap V453
  88
• 4.12 Removing and installing rear left temperature flap control motor V313
  89
• 4.13 Removing and installing rear right temperature flap control motor V314
  90
• 5 Front heater and air conditioning unit
  91
• 5.1 Assembly overview – heater and air conditioning unit
  91
• 5.2 Removing and installing auxiliary air heater element Z35
  93
• 5.3 Removing and installing heater and air conditioning unit
  97
• 5.4 Dismantling and assembling heater and air conditioning unit
  100
• 5.5 Removing and installing dust and pollen filter
  102
• 5.6 Removing and installing fresh air blower V2
  104
• 5.7 Removing and installing evaporator temperature sensor G308
  105
• 5.8 Removing and installing heat exchanger
  105
• 5.9 Checking condensation drain
  109
• 5.10 Dismantling and assembling evaporator housing
  110
• 5.11 Removing and installing evaporator
  113
• 5.12 Removing and installing evaporator with heater and air conditioner unit installed
  115
• 6 Rear heater and air conditioning unit
  117
• 6.1 Assembly overview – heater and air conditioning unit
  117
• 6.2 Rear heater and air conditioning unit, service position
  120
• 6.3 Removing and installing heater and air conditioning unit
  121
• 6.4 Dismantling and assembling 2nd heater and air conditioning unit
  125
• 6.5 Removing and installing rear left vent temperature sender G405
  127
• 6.6 Removing and installing rear right vent temperature sender G406
  127
• 6.7 Removing and installing rear fresh air blower V80
  128
• 6.8 Removing and installing heat exchanger
  128
• 6.9 Checking condensation drain hose
  132
• 7 Air duct
  133
• 7.1 Removing and installing driver-side vent in dash panel
  133
• 7.2 Removing and installing front-passenger side vent in dash panel
  134
• 7.3 Removing side vent in B-pillar
  135
• 7.4 Removing and installing driver side footwell vents
  135
• 7.5 Removing and installing front passenger side footwell vents
  136
• 7.6 Removing and installing rear vents
  137
• 7.7 Removing and installing fresh air intake
  138
• 7.8 Checking forced ventilation for passenger compartment
  139
• 8 Coolant circuit
  140
• 8.1 Removing and installing coolant shut-off valve N82
  140
• 8.2 Removing and installing circulation pump V55
  143
• 9 Operating and display unit
  146
• 9.1 Overview of operating and display unit
  146
• 9.2 Removing and installing operating and display unit
  151
• 9.3 Climatronic function via the infotainment system
  154
• 10 Other controlling and regulating components
  157
• 10.1 Removing and installing sunlight penetration photosensor G107
  157
• 10.2 Removing and installing air quality sensor G238
  158
• 10.3 Principle of operation of air quality sensor G238
  158
• 10.4 Removing and installing ambient temperature sensor G17
  160
• 10.5 Removing and installing humidity sender for air conditioning system G260
  160
• 10.6 Removing and installing left footwell vent temperature sender G261
  160
• 10.7 Removing and installing right footwell vent temperature sender G262
  161