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 start/stop system
  1
• 1.4 Safety precautions when working on cooling system
  2
• 1.5 Safety precautions when handling refrigerants
  2
• 1.6 Safety precautions for working on vehicles with auxiliary heater
  3
• 1.7 Safety precautions when working on SCR system
  4
• 2 Identification
  6
• 2.1 Identification of heater and air conditioning unit
  6
• 3 General information
  8
• 3.1 Type plates
  8
• 3.2 Notes concerning odours in air conditioned vehicles
  10
• 4 Repair notes
  12
• 4.1 Rules for cleanliness
  12
• 4.2 General information
  12
• 4.3 General repair instructions
  12
• 4.4 Contact corrosion
  13
• 4.5 Nuts and bolts
  13
• 4.6 Routing and attachment of lines
  13
• 4.7 Fitting radiator and condensers
  13
• 4.8 Working on refrigerant circuit
  14
• 4.9 Refrigerant circuit seals
  15
• 5 Technical data
  16
• 5.1 Refrigerant capacity
  16
• 5.2 Refrigerant oil capacities
  16
• 5.3 Oil distribution
  17
• Heating
  18
• 1 Heating
  18
• Air conditioning system
  19
• 1 Overview of fitting locations - air conditioning system
  19
• 1.1 Overview of fitting locations - components not located in passenger compartment
  19
• 2 Refrigerant circuit
  26
• 2.1 System overview - refrigerant circuit
  26
• 2.2 Assembly overview - condenser
  28
• 2.3 Removing and installing refrigerant circuit pressure sender G805
  30
• 2.4 Removing and installing refrigerant line with internal heat exchanger
  32
• 2.5 Removing and installing expansion valve
  35
• 2.6 Removing and installing condenser
  40
• 2.7 Removing and installing desiccant bag or cartridge
  43
• 2.9 Commissioning air conditioning system after filling refrigerant circuit
  56
• 2.13 Removing and installing damper weight for refrigerant line, low-pressure side
  67
• 2.14 Commissioning air conditioning system after filling refrigerant circuit
  68
• 3 Air conditioner compressor
  70
• 3.1 Assembly overview - drive unit of air conditioner compressor
  70
• 3.2 Assembly overview - pulley
  74
• 3.3 Removing air conditioning compressor from and installing on bracket
  78
• 3.4 Removing and installing air conditioner compressor
  80
• 3.5 Checking high-pressure safety valve on air conditioner compressor
  85
• 3.6 Removing and installing pulley
  86
• 4 Control motors
  93
• 4.1 Overview of fitting locations – front control motors
  93
• 4.2 Removing and installing temperature flap control motor V68
  97
• 4.3 Removing and installing defroster flap control motor V107
  99
• 4.4 Removing and installing air recirculation flap control motor V113
  101
• 4.5 Removing and installing left temperature flap control motor V158
  102
• 4.6 Removing and installing right temperature flap control motor V159
  104
• 4.7 Removing and installing fresh air/air recirculation, air flow flap control motor V425
  105
• 4.8 Removing and installing front air distribution flap control motor V426
  107
• 4.9 Removing and installing air distribution flap control motor V428
  108
• 4.10 Removing and installing air distribution flap actuator
  110
• 5 Front heater and air conditioning unit
  117
• 5.1 Assembly overview - flaps and partitions in air distribution housing
  117
• 5.2 Assembly overview – heater and air conditioning unit
  119
• 5.3 Assembly overview – evaporator housing
  121
• 5.4 Removing and installing evaporator
  121
• 5.5 Checking auxiliary air heater element Z35
  122
• 5.6 Removing and installing auxiliary air heater element Z35
  123
• 5.7 Removing and installing heater and air conditioning unit
  127
• 5.8 Removing and installing holder for heater and air conditioning unit
  133
• 5.9 Dismantling and assembling heater and air conditioning unit
  134
• 5.10 Removing and installing air distribution housing
  135
• 5.11 Removing and installing dust and pollen filter
  136
• 5.12 Removing and installing fresh air blower V2
  137
• 5.13 Removing and installing fresh air blower control unit J126
  140
• 5.14 Removing and installing heat exchanger
  142
• 5.15 Removing and installing coolant pipes on heat exchanger
  165
• 5.16 Removing and installing evaporator temperature sensor G308
  169
• 5.17 Removing and installing condensation drain
  170
• 5.18 Checking condensation drain
  174
• 5.19 Removing and installing baffle plate
  174
• 6 Air duct
  175
• 6.1 Assembly overview - air duct and air distribution in passenger compartment
  175
• 6.2 Removing and installing driver side footwell vents
  176
• 6.3 Removing and installing front passenger side footwell vents
  177
• 6.4 Removing and installing rear footwell vent
  179
• 6.5 Removing and installing air ducts
  181
• 6.6 Removing and installing forced ventilation for passenger compartment
  182
• 6.7 Checking forced ventilation for passenger compartment
  183
• 6.8 Removing and installing fresh air intake
  183
• 6.9 Removing and installing cover for fresh air intake
  185
• 6.10 Removing and installing air intake duct
  186
• 6.11 Removing and installing air duct for defroster vent
  186
• 6.12 Removing and installing air duct for centre vent
  187
• 7 Operating and display unit
  188
• 7.1 Overview of operating and display unit
  188
• 7.2 Removing and installing operating and display unit
  192
• 8 Other controlling and regulating components
  194
• 8.1 Removing and installing sunlight penetration photosensor G107
  194
• 8.2 Removing and installing air quality sensor G238
  195
• 8.3 Removing and installing ambient temperature sensor G17
  196
• 8.4 Removing and installing humidity sender for air conditioning system G260
  196
• 8.5 Removing and installing left vent temperature sender G150
  196
• 8.6 Removing and installing right vent temperature sender G151
  198
• 8.7 Removing and installing footwell vent temperature sender G192
  200