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 measures when working on vehicles with a start/stop system
  1
• 1.3 Safety precautions when working on the cooling system
  1
• 2 General information
  3
• 2.1 Notes concerning odours in air conditioned vehicles
  3
• 2.2 Notes for vehicles with start-stop system
  3
• 3 Repair notes
  4
• 3.1 Checking cooling output
  4
• 3.2 Working on refrigerant circuit
  5
• 3.3 Refrigerant circuit seals
  5
• 3.4 Notes on control motors
  6
• 4 Technical data
  12
• 4.1 Refrigerant capacity
  12
• 4.2 Refrigerant oil capacities
  12
• 4.3 Oil distribution
  13
• Heating
  14
• 1 Heating
  14
• Air conditioning system
  15
• 1 Overview of fitting locations - air conditioning system
  15
• 2 Refrigerant circuit
  20
• 2.1 System overview - refrigerant circuit
  20
• 2.2 Assembly overview - condenser
  22
• 2.3 Removing and installing high-pressure sender G65
  22
• 2.4 Removing and installing expansion valve
  24
• 2.5 Removing and installing condenser
  26
• 2.6 Removing and installing desiccant bag or cartridge
  28
• 2.7 Removing and installing evacuating and charging valves on low and high-pressure side
  34
• 3 Air conditioner compressor
  37
• 3.1 Assembly overview - pulley
  37
• 3.2 Removing air conditioning compressor from and installing on bracket
  38
• 3.3 Removing and installing air conditioner compressor
  40
• 3.4 Checking high-pressure safety valve on air conditioner compressor
  43
• 3.5 Removing and installing pulley
  44
• 4 Control motors
  47
• 4.1 Overview of fitting locations - front control motors
  47
• 4.2 Removing and installing temperature flap control motor V68
  49
• 4.3 Removing and installing defroster flap control motor V107
  51
• 4.4 Removing and installing air recirculation flap control motor V113
  53
• 4.5 Removing and installing left temperature flap control motor V158
  58
• 4.6 Removing and installing right temperature flap control motor V159
  60
• 4.7 Removing and installing indirect ventilation flap control motor V213
  62
• 4.8 Removing and installing fresh air/recirculated air, air flow flap control motor V425
  63
• 4.9 Removing and installing front air distribution flap control motor V426
  65
• 4.10 Removing and installing air distribution flap control motor V428
  66
• 4.11 Removing and installing fresh air/air recirculation, air flow flap actuator
  67
• 5 Front heater and air conditioning unit
  68
• 5.1 Assembly overview - heater and air conditioning unit
  68
• 5.2 Removing and installing evaporator
  73
• 5.3 Dismantling and assembling evaporator housing
  73
• 5.4 Removing and installing heater and air conditioning unit
  74
• 5.5 Dismantling and assembling heater and air conditioning unit
  78
• 5.6 Removing and installing air distribution housing
  80
• 5.7 Dismantling and assembling air distribution housing
  81
• 5.8 Checking auxiliary air heater element Z35
  83
• 5.9 Removing and installing auxiliary air heater element Z35
  84
• 5.10 Removing and installing evaporator temperature sensor G308
  85
• 5.11 Removing and installing dust and pollen filter
  85
• 5.12 Removing and installing fresh air blower series resistor with overheating fuse N24
  86
• 5.13 Removing and installing fresh air blower V2
  87
• 5.14 Removing and installing fresh air blower control unit J126
  89
• 5.15 Removing and installing heat exchanger
  89
• 5.16 Removing and installing condensation drain
  93
• 5.17 Checking condensation drain
  94
• 6 Air duct
  95
• 6.1 Assembly overview - air duct and air distribution in passenger compartment
  95
• 6.2 Removing and installing centre vent
  96
• 6.3 Removing and installing driver or front passenger side air vents
  97
• 6.4 Removing and installing rear vents
  98
• 6.5 Removing and installing driver side footwell vents
  99
• 6.6 Removing and installing front passenger side footwell vents
  100
• 6.7 Removing and installing left or right side window vents
  101
• 6.8 Removing and installing rear footwell vent
  102
• 6.9 Removing and installing rear centre console vent duct
  103
• 6.10 Removing and installing rear footwell vent
  104
• 6.11 Removing and installing fresh air intake
  104
• 6.12 Removing and installing glove box cooling
  105
• 6.13 Checking forced ventilation for passenger compartment
  105
• 6.14 Removing and installing forced ventilation for passenger compartment
  106
• 7 Operating and display unit
  108
• 7.1 Overview of operating and display unit
  108
• 7.2 Removing and installing operating and display unit
  118
• 8 Other controlling and regulating components
  122
• 8.1 Removing and installing sunlight penetration photosensor G107
  122
• 8.2 Principle of operation of air quality sensor G238
  122
• 8.3 Removing and installing air quality sensor G238
  124
• 8.4 Removing and installing ambient temperature sensor G17
  124
• 8.5 Removing and installing left vent temperature sender G150
  125
• 8.6 Removing and installing right vent temperature sender G151
  125
• 8.7 Removing and installing left footwell vent temperature sender G261
  126
• 8.8 Removing and installing right footwell vent temperature sender G262
  126