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 instructions
  4
• 3.1 Working on refrigerant circuit
  4
• 3.2 Refrigerant circuit seals
  4
• 3.3 Notes on control motors
  5
• 4 Technical data
  11
• 4.1 Capacities for refrigerant R134a
  11
• 4.2 Refrigerant oil
  11
• 4.3 Oil distribution
  11
• Heating
  12
• 1 Heater
  12
• 1.1 Removing and installing fresh air blower V2
  12
• 1.2 Removing and installing fresh air blower series resistor with overheating fuse N24
  13
• 1.3 Removing and installing heater unit
  13
• 1.4 Dismantling and assembling heater unit
  17
• 2 Control motors
  20
• 3 Air duct
  21
• 4 Operating and display unit
  22
• 5 Other controlling and regulating components
  23
• Air conditioning system
  24
• 1 Overview of fitting locations - air conditioning system
  24
• 2 Refrigerant circuit
  30
• 2.1 System overview - refrigerant circuit
  30
• 2.2 Removing and installing high-pressure sender G65
  31
• 2.3 Removing and installing expansion valve
  32
• 2.4 Removing and installing condenser
  35
• 2.5 Removing and installing receiver
  38
• 2.6 Removing and installing desiccant bag or cartridge
  39
• 2.7 Removing and installing evacuating and charging valves on low and high-pressure side
  41
• 3 Air conditioner compressor
  43
• 3.1 Assembly overview - drive unit of air conditioner compressor
  43
• 3.2 Removing and installing air conditioner compressor
  43
• 3.3 Checking high-pressure safety valve on air conditioner compressor
  48
• 3.4 Ancillary bracket for air conditioner compressor
  49
• 4 Front heater and air conditioning unit
  61
• 4.1 Assembly overview – heater and air conditioning unit
  61
• 4.2 Removing and installing heater and air conditioning unit
  66
• 4.3 Removing and installing evaporator
  71
• 4.4 Dismantling and assembling evaporator housing
  72
• 4.5 Removing fresh air blower V2 with fresh air blower control unit J126
  73
• 4.6 Removing and installing evaporator output temperature sender G263
  74
• 4.7 Removing and installing evaporator temperature sensor G308
  75
• 4.8 Removing and installing dust and pollen filter
  75
• 4.9 Removing and installing heat exchanger
  76
• 4.10 Removing and installing auxiliary air heater element Z35
  80
• 4.11 Checking condensation drain
  83
• 4.12 Removing and installing glove box cooling
  83
• 5 Air duct
  85
• 5.1 Removing and installing fresh air intake
  85
• 5.2 Removing and installing air intake duct
  86
• 5.3 Removing vents
  87
• 5.4 Checking forced ventilation for passenger compartment
  89
• 5.5 Removing and installing forced ventilation for passenger compartment
  89
• 6 Operating and display unit
  91
• 6.1 Overview of operating and display unit
  91
• 6.2 Removing and installing operating and display unit
  102
• 6.3 Multi-pin connector pin assignment on back of operating and display unit
  103
• 7 Control motors
  110
• 7.1 Removing and installing temperature flap control motor V68
  110
• 7.2 Removing and installing centre flap control motor V70
  112
• 7.3 Removing and installing air flow flap control motor V71
  113
• 7.4 Removing and installing defroster flap control motor V107
  117
• 7.5 Removing and installing air recirculation flap control motor V113
  119
• 7.7 Removing and installing left temperature flap control motor V158
  124
• 7.8 Removing and installing right temperature flap control motor V159
  126
• 7.9 Removing and installing fresh air/air recirculation, air flow flap control motor V425
  128
• 7.10 Removing and installing front air distribution flap control motor V426
  130
• 7.11 Removing and installing air distribution flap control motor V428
  131
• 7.12 Removing and installing air distribution flap actuator
  132
• 7.13 Removing and installing flexible shaft, vehicles up to week 21/08
  133
• 8 Other controlling and regulating components
  135
• 8.1 Removing and installing ambient temperature sensor G17
  135
• 8.3 Principle of operation of air quality sensor G238
  136
• 8.4 Removing and installing air quality sensor G238 , vehicles from week 22/08
  137
• 8.5 Removing and installing left vent temperature sender G150
  138
• 8.6 Removing and installing right vent temperature sender G151
  139
• 8.7 Removing and installing centre vent temperature sender G191
  139
• 8.8 Removing and installing footwell vent temperature sender G192
  139
• 8.9 Removing and installing left footwell vent temperature sender G261
  140
• 8.10 Removing and installing right footwell vent temperature sender G262
  140