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
  5
• 2.1 Identification of heater and air conditioning unit
  5
• 3 General information
  7
• 3.1 Notes concerning odours in air conditioned vehicles
  7
• 3.2 Notes for vehicles with start-stop system
  7
• 3.3 Type plates
  8
• 4 Repair instructions
  10
• 4.1 Working on refrigerant circuit
  10
• 4.2 General repair instructions
  10
• 4.3 Refrigerant circuit seals
  11
• 4.4 Checking cooling output
  11
• 5 Technical data
  14
• 5.1 Refrigerant capacity
  14
• 5.2 Refrigerant oil
  14
• 5.3 Oil distribution
  15
• Heating
  16
• 1 Heating system
  16
• 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
  22
• 2.1 System overview - refrigerant circuit
  22
• 2.2 Assembly overview – condenser
  24
• 2.3 Removing and installing refrigerant circuit pressure sender G805
  26
• 2.4 Removing and installing expansion valve
  28
• 2.5 Removing and installing condenser
  31
• 2.6 Removing and installing desiccant bag or cartridge
  35
• 2.7 Removing and installing damper weight for refrigerant line, low-pressure side
  46
• 2.9 Removing and installing refrigerant line with internal heat exchanger
  49
• 2.13 Commissioning air conditioning system after filling refrigerant circuit
  63
• 3 Air conditioner compressor
  64
• 3.1 Assembly overview – air conditioner compressor
  64
• 3.2 Assembly overview - pulley
  68
• 3.3 Removing air conditioning compressor from and installing on bracket
  75
• 3.4 Removing and installing air conditioner compressor
  77
• 3.5 Checking high-pressure safety valve on air conditioner compressor
  83
• 3.6 Removing and installing pulley
  84
• 4 Control motors
  93
• 4.1 Overview of fitting locations – control motors at front
  93
• 4.2 Removing and installing temperature flap control motor V68
  98
• 4.3 Removing and installing defroster flap control motor V107
  101
• 4.4 Removing and installing air recirculation flap control motor V113
  105
• 4.5 Removing and installing left temperature flap control motor V158
  109
• 4.6 Removing and installing right temperature flap control motor V159
  113
• 4.7 Removing and installing rear temperature flap control motor V137
  117
• 4.8 Removing and installing fresh air/air recirculation, air flow flap control motor V425
  119
• 4.9 Removing and installing front air distribution flap control motor V426
  123
• 4.10 Removing and installing air distribution flap control motor V428
  127
• 4.11 Removing and installing air distribution flap actuator
  131
• 5 Front heater and air conditioning unit
  139
• 5.1 Assembly overview – heater and air conditioning unit
  139
• 5.3 Assembly overview – evaporator housing
  147
• 5.4 Assembly overview - flaps and partitions in air distribution housing
  148
• 5.5 Removing and installing heater and air conditioning unit
  151
• 5.6 Dismantling and assembling heater and air conditioning unit
  157
• 5.7 Removing and installing air distribution housing
  158
• 5.8 Removing and installing holder for heater and air conditioning unit
  159
• 5.9 Removing and installing evaporator
  161
• 5.10 Removing and installing fresh air blower control unit J126
  163
• 5.11 Removing and installing dust and pollen filter
  164
• 5.12 Removing and installing fresh air blower V2
  169
• 5.13 Checking auxiliary air heater element Z35
  172
• 5.14 Removing and installing auxiliary air heater element Z35
  174
• 5.15 Removing and installing heat exchanger
  176
• 5.16 Removing and installing coolant pipes on heat exchanger
  197
• 5.17 Removing and installing evaporator temperature sensor G308
  201
• 5.18 Checking condensation drain
  203
• 5.19 Removing and installing condensation drain
  205
• 5.20 Removing and installing baffle plate
  209
• 6 Air duct
  210
• 6.1 Assembly overview – air duct and air distribution in passenger compartment
  210
• 6.2 Removing and installing fresh air intake
  211
• 6.3 Removing and installing cover for fresh air intake
  213
• 6.4 Removing and installing air intake duct
  214
• 6.5 Removing and installing driver side footwell vents
  215
• 6.6 Removing and installing front passenger side footwell vents
  217
• 6.7 Removing and installing rear footwell vent
  218
• 6.8 Removing and installing air duct for rear vent
  219
• 6.9 Removing and installing air duct for rear centre console vent
  220
• 6.10 Checking forced ventilation for passenger compartment
  221
• 6.11 Removing and installing forced ventilation for passenger compartment
  222
• 6.12 Removing and installing air duct for defroster vent
  223
• 6.13 Removing and installing air duct for centre dash panel vent
  223
• 7 Operating and display unit
  225
• 7.1 Overview of operating and display unit
  225
• 7.2 Removing and installing operating and display unit, front
  230
• 7.3 Removing and installing rear operating and display unit
  232
• 8 Other controlling and regulating components
  234
• 8.1 Removing and installing sunlight penetration photosensor G107
  234
• 8.2 Removing and installing air quality sensor G238
  235
• 8.3 Removing and installing ambient temperature sensor G17
  237
• 8.4 Removing and installing humidity sender for air conditioning system G260
  238
• 8.5 Removing and installing left vent temperature sender G150
  238
• 8.6 Removing and installing right vent temperature sender G151
  240
• 8.7 Removing and installing rear vent temperature sender G174
  241
• 8.8 Removing and installing footwell vent temperature sender G192
  242