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 the cooling system
  2
• 1.5 Safety precautions for working on vehicles with auxiliary/supplementary heater
  2
• 2 Identification
  4
• 2.1 Identification of heater and air conditioning unit
  4
• 3 General information
  6
• 3.1 Notes for vehicles with start-stop system
  6
• 3.2 Type plates
  6
• 4 Repair instructions
  10
• 4.1 Working on refrigerant circuit
  10
• 4.2 General repair instructions
  10
• 4.3 Refrigerant circuit seals
  10
• 5 Technical data
  12
• 5.1 Refrigerant capacity
  12
• 5.2 Refrigerant oil capacities
  12
• 5.3 Oil distribution
  13
• Heating
  14
• 1 Overview of fitting locations - heating
  14
• 1.1 Overview of fitting locations - components not located in passenger compartment
  14
• 2 Control motors
  19
• 2.1 Overview of fitting locations – control motors at front
  19
• 2.3 Removing and installing air recirculation flap control motor V113
  21
• 3 Heater
  22
• 3.1 Assembly overview – heater unit
  22
• 3.2 Removing and installing fresh air blower V2
  27
• 3.3 Removing and installing fresh air blower control unit J126
  27
• 3.4 Removing and installing dust and pollen filter
  27
• 3.5 Removing and installing heater unit
  27
• 3.6 Dismantling and assembling heater unit
  27
• 3.9 Removing and installing heat exchanger
  27
• 4 Air duct
  28
• 4.1 Assembly overview – air duct and air distribution in passenger compartment
  28
• 4.2 Removing and installing driver side footwell vents
  28
• 4.3 Removing and installing front passenger side footwell vents
  28
• 4.4 Removing and installing rear footwell vent
  28
• 4.5 Removing and installing fresh air intake
  28
• 4.6 Removing and installing cover for fresh air intake
  28
• 4.7 Removing and installing air intake duct
  28
• 4.8 Checking forced ventilation for passenger compartment
  29
• 4.9 Removing and installing forced ventilation for passenger compartment
  29
• 4.10 Removing and installing air duct for defroster vent
  29
• 4.11 Removing and installing air duct for centre vent
  29
• 5 Operating and display unit
  30
• 5.1 Overview of operating and display unit
  30
• 5.2 Removing and installing operating and display unit
  32
• 6 Other controlling and regulating components
  33
• 6.1 Removing and installing ambient temperature sensor G17
  33
• Air conditioning system
  34
• 1 Overview of fitting locations - air conditioning system
  34
• 1.1 Overview of fitting locations - components not located in passenger compartment
  34
• 2 Refrigerant circuit
  43
• 2.1 System overview - refrigerant circuit
  43
• 2.2 Assembly overview – condenser
  46
• 2.3 Removing and installing refrigerant circuit pressure sender G805
  48
• 2.4 Removing and installing expansion valve
  49
• 2.5 Removing and installing condenser
  53
• 2.6 Removing and installing desiccant bag or cartridge
  56
• 2.7 Removing and installing refrigerant line with internal heat exchanger
  67
• 2.8 Removing and installing damper weight for refrigerant line, low-pressure side
  70
• 2.10 Commissioning air conditioning system after filling refrigerant circuit
  73
• 3 Air conditioner compressor
  74
• 3.1 Assembly overview – drive unit of air conditioner compressor
  74
• 3.2 Assembly overview - pulley
  78
• 3.3 Removing air conditioning compressor from and installing on bracket
  85
• 3.4 Removing and installing air conditioner compressor
  88
• 3.5 Checking high-pressure safety valve on air conditioner compressor
  93
• 3.6 Removing and installing pulley
  94
• 4 Front heater and air conditioning unit
  104
• 4.1 Assembly overview – heater and air conditioning unit
  104
• 4.3 Assembly overview – evaporator housing
  113
• 4.4 Assembly overview - flaps and partitions in air distribution housing
  115
• 4.5 Removing and installing heater and air conditioning unit
  118
• 4.6 Dismantling and assembling heater and air conditioning unit
  124
• 4.7 Removing and installing air distribution housing
  126
• 4.8 Removing and installing holder for heater and air conditioning unit
  127
• 4.9 Removing and installing evaporator
  128
• 4.10 Removing and installing fresh air blower control unit J126
  130
• 4.11 Removing and installing dust and pollen filter
  132
• 4.12 Removing and installing fresh air blower V2
  136
• 4.15 Removing and installing heat exchanger
  143
• 4.16 Removing and installing coolant pipes on heat exchanger
  167
• 4.17 Removing and installing evaporator temperature sensor G308
  171
• 4.18 Checking condensation drain
  173
• 4.19 Removing and installing condensation drain
  175
• 5 Air duct
  180
• 5.1 Assembly overview – air duct and air distribution in passenger compartment
  180
• 5.2 Removing and installing fresh air intake
  181
• 5.3 Removing and installing cover for fresh air intake
  184
• 5.4 Removing and installing air intake duct
  186
• 5.5 Removing and installing driver side footwell vents
  187
• 5.6 Removing and installing front passenger side footwell vents
  189
• 5.7 Removing and installing rear footwell vent
  190
• 5.8 Removing and installing air duct for rear centre console vent
  192
• 5.9 Checking forced ventilation for passenger compartment
  192
• 5.10 Removing and installing forced ventilation for passenger compartment
  193
• 5.11 Removing and installing air duct for defroster vent
  194
• 5.12 Removing and installing air duct for centre vent
  194
• 6 Operating and display unit
  196
• 6.1 Overview of fitting locations – operating and display unit
  196
• 6.2 Removing and installing operating and display unit
  200
• 7 Control motors
  203
• 7.1 Overview of fitting locations – control motors at front
  203
• 7.4 Removing and installing air recirculation flap control motor V113
  215
• 7.10 Removing and installing air distribution flap actuator
  241
• 8 Other controlling and regulating components
  249
• 8.1 Removing and installing sunlight penetration photosensor G107
  249
• 8.2 Removing and installing air quality sensor G238
  250
• 8.3 Working principles of air quality sensor G238
  252
• 8.4 Removing and installing ambient temperature sensor G17
  253
• 8.5 Removing and installing humidity sender for air conditioning system G260
  254
• 8.6 Removing and installing left vent temperature sender G150
  254
• 8.7 Removing and installing right vent temperature sender G151
  257
• 8.8 Removing and installing footwell vent temperature sender G192
  259