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
• 1.4 Safety precautions when working on the cooling system
  2
• 1.5 Safety precautions when handling refrigerants
  2
• 1.6 Safety precautions when working on SCR system
  3
• 2 General information
  5
• 2.1 Type plates
  5
• 2.2 Notes concerning odours in air conditioned vehicles
  6
• 3 Repair instructions
  8
• 3.1 Rules for cleanliness
  8
• 3.2 General information
  8
• 3.3 General repair instructions
  8
• 3.4 Contact corrosion
  9
• 3.5 Nuts and bolts
  9
• 3.6 Routing and attachment of lines
  9
• 3.7 Fitting radiator and condensers
  9
• 3.8 Working on refrigerant circuit
  10
• 3.9 Refrigerant circuit seals
  11
• 4 Technical data
  12
• 4.1 Refrigerant capacity
  12
• 4.2 Refrigerant oil capacities
  12
• 4.3 Oil distribution
  13
• Heating
  14
• 1 Heater
  14
• 2 Operating and display unit
  15
• 2.1 Overview of operating and display unit
  15
• 2.2 Removing and installing operating and display unit
  15
• Air conditioning system
  17
• 1 Overview of fitting locations - air conditioning system
  17
• 1.1 Overview of fitting locations - components not located in passenger compartment
  17
• 2 Refrigerant circuit
  21
• 2.1 System overview - refrigerant circuit
  21
• 2.2 Assembly overview - condenser
  23
• 2.3 Removing and installing refrigerant circuit pressure sender G805
  24
• 2.4 Removing and installing expansion valve
  25
• 2.5 Removing and installing condenser
  29
• 2.6 Removing and installing desiccant bag or cartridge
  33
• 2.7 Removing and installing evacuating and charging valves on low and high-pressure side
  39
• 2.8 Commissioning air conditioning system after filling refrigerant circuit
  41
• 3 Air conditioner compressor
  51
• 3.1 Assembly overview - drive unit of air conditioner compressor
  51
• 3.2 Assembly overview - pulley
  54
• 3.3 Removing air conditioning compressor from and installing on bracket
  58
• 3.4 Removing and installing air conditioner compressor
  60
• 3.5 Checking high-pressure safety valve on air conditioner compressor
  64
• 3.6 Removing and installing pulley
  65
• 4 Control motors
  70
• 4.1 Overview of fitting locations – front control motors
  70
• 4.2 Removing and installing defroster flap control motor V107
  75
• 4.3 Removing and installing front air distribution flap control motor V426
  77
• 4.5 Removing and installing left temperature flap control motor V158
  79
• 4.6 Removing and installing right temperature flap control motor V159
  81
• 4.7 Removing and installing fresh air/air recirculation, air flow flap control motor V425
  84
• 4.8 Removing and installing air distribution flap actuator
  86
• 4.9 Removing and installing temperature flap actuator
  88
• 5 Front heater and air conditioning unit
  91
• 5.1 Assembly overview – heater and air conditioning unit
  91
• 5.2 Assembly overview – evaporator housing
  94
• 5.3 Removing and installing evaporator
  95
• 5.4 Checking auxiliary air heater element Z35
  96
• 5.5 Removing and installing auxiliary air heater element Z35
  97
• 5.6 Removing and installing heater and air conditioning unit
  98
• 5.7 Removing and installing holder for heater and air conditioning unit
  103
• 5.8 Dismantling and assembling heater and air conditioning unit
  103
• 5.9 Removing and installing air distribution housing
  103
• 5.10 Removing and installing dust and pollen filter
  104
• 5.11 Removing and installing fresh air blower V2
  106
• 5.12 Removing and installing fresh air blower control unit J126
  106
• 5.13 Removing and installing heat exchanger
  107
• 5.14 Removing and installing coolant pipes on heat exchanger
  116
• 5.15 Removing and installing evaporator temperature sensor G308
  118
• 5.16 Removing and installing flexible shafts
  120
• 5.17 Removing and installing condensation drain
  122
• 5.18 Checking condensation drain
  124
• 5.19 Fresh air blower series resistor with overheating fuse N24
  124
• 6 Air duct
  126
• 6.1 Assembly overview - air duct and air distribution in passenger compartment
  126
• 6.2 Removing and installing driver side footwell vents
  130
• 6.3 Removing and installing front passenger side footwell vents
  132
• 6.4 Removing and installing rear footwell vent
  133
• 6.5 Removing and installing forced ventilation for passenger compartment
  134
• 6.6 Checking forced ventilation for passenger compartment
  135
• 6.7 Removing and installing fresh air intake
  136
• 6.8 Removing and installing cover for fresh air intake
  136
• 6.9 Removing and installing air intake duct
  137
• 6.10 Removing and installing air duct for defroster vent
  137
• 6.11 Removing and installing air duct for centre vent
  138
• 7 Operating and display unit
  139
• 7.1 Overview of operating and display unit
  139
• 7.2 Removing and installing operating and display unit
  141
• 8 Other controlling and regulating components
  143
• 8.1 Removing and installing sunlight penetration photosensor G107
  143
• 8.2 Removing and installing ambient temperature sensor G17
  144
• 8.3 Removing and installing humidity sender for air conditioning system G260
  144
• 8.4 Removing and installing left vent temperature sender G150
  144
• 8.5 Removing and installing right vent temperature sender G151
  146
• 8.6 Removing and installing footwell vent temperature sender G192
  147