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 heater
  2
• 2 Identification
  4
• 2.1 Identification of heater and air conditioning unit
  4
• 3 General information
  5
• 3.1 Notes concerning odours in air conditioned vehicles
  5
• 3.2 Notes for vehicles with start-stop system
  5
• 3.3 Type plates
  6
• 4 Repair instructions
  7
• 4.1 Working on refrigerant circuit
  7
• 4.2 General repair instructions
  7
• 4.3 Refrigerant circuit seals
  7
• 5 Technical data
  9
• 5.1 Refrigerant capacity
  9
• 5.2 Refrigerant oil
  9
• 5.3 Oil distribution
  9
• Heating
  11
• 1 Heating
  11
• Air conditioning system
  12
• 1 Overview of fitting locations - air conditioning system
  12
• 1.1 Overview of fitting locations - components not located in passenger compartment
  12
• 2 Refrigerant circuit
  17
• 2.1 System overview - refrigerant circuit
  17
• 2.2 Assembly overview - condenser
  20
• 2.3 Removing and installing refrigerant circuit pressure sender G805
  22
• 2.4 Removing and installing expansion valve
  23
• 2.5 Removing and installing condenser
  26
• 2.6 Removing and installing desiccant bag or cartridge
  29
• 2.7 Removing and installing damper weight for refrigerant line, low-pressure side
  35
• 2.8 Removing and installing evacuating and charging valves on low and high-pressure side
  36
• 2.9 Removing and installing refrigerant line with internal heat exchanger
  38
• 2.10 Removing and installing refrigerant line between condenser and evaporator
  41
• 3 Air conditioner compressor
  47
• 3.1 Assembly overview - drive unit of air conditioner compressor
  47
• 3.2 Assembly overview - pulley
  49
• 3.3 Removing air conditioning compressor from and installing on bracket
  53
• 3.4 Removing and installing air conditioner compressor
  55
• 3.5 Checking high-pressure safety valve on air conditioner compressor
  59
• 3.6 Removing and installing pulley
  59
• 4 Control motors
  64
• 4.1 Overview of fitting locations – front control motors
  64
• 4.4 Removing and installing air recirculation flap control motor V113
  76
• 4.5 Removing and installing left temperature flap control motor V158 with potentiometer G220
  80
• 4.6 Removing and installing right temperature flap control motor V159 with potentiometer G221
  84
• 4.7 Removing and installing rear temperature flap control motor V137
  87
• 4.10 Removing and installing air distribution flap control motor V428 with potentiometer G645
  98
• 4.11 Removing and installing air distribution flap actuator
  102
• 5 Front heater and air conditioning unit
  108
• 5.1 Assembly overview – heater and air conditioning unit
  108
• 5.2 Assembly overview - add-on parts of heater and air conditioning unit and of air intake box
  113
• 5.3 Assembly overview – evaporator housing
  115
• 5.4 Assembly overview - flaps and partitions in air distribution housing
  116
• 5.5 Removing and installing heater and air conditioning unit
  119
• 5.6 Dismantling and assembling heater and air conditioning unit
  124
• 5.7 Removing and installing air distribution housing
  126
• 5.8 Removing and installing holder for heater and air conditioning unit
  126
• 5.9 Removing and installing evaporator
  127
• 5.10 Removing and installing fresh air blower control unit J126
  129
• 5.11 Removing and installing dust and pollen filter
  130
• 5.12 Removing and installing fresh air blower V2
  132
• 5.15 Removing and installing heat exchanger
  138
• 5.16 Removing and installing coolant pipes on heat exchanger
  155
• 5.17 Removing and installing evaporator temperature sensor G308
  158
• 5.18 Checking condensation drain
  159
• 5.19 Removing and installing condensation drain
  160
• 5.20 Removing and installing baffle plate
  164
• 6 Air duct
  165
• 6.1 Assembly overview - air duct and air distribution in passenger compartment
  165
• 6.2 Removing and installing fresh air intake
  166
• 6.3 Removing and installing cover for fresh air intake
  168
• 6.4 Removing and installing air intake duct
  169
• 6.5 Removing and installing driver side footwell vents
  170
• 6.6 Removing and installing front passenger side footwell vents
  171
• 6.7 Removing and installing rear footwell vent
  172
• 6.8 Removing and installing air duct for rear vent
  173
• 6.9 Removing and installing rear centre console vent duct
  173
• 6.10 Checking forced ventilation for passenger compartment
  174
• 6.11 Removing and installing forced ventilation for passenger compartment
  174
• 6.12 Removing and installing air duct for defroster vent
  175
• 6.13 Removing and installing air duct for centre dash panel vent
  176
• 7 Operating and display unit
  177
• 7.1 Overview of operating and display unit
  177
• 7.2 Removing and installing operating and display unit
  182
• 8 Other controlling and regulating components
  185
• 8.1 Removing and installing sunlight penetration photosensor G107
  185
• 8.2 Removing and installing air quality sensor G238
  186
• 8.3 Removing and installing ambient temperature sensor G17
  187
• 8.4 Removing and installing humidity sender for air conditioning system G260
  188
• 8.5 Removing and installing left vent temperature sender G150
  188
• 8.6 Removing and installing right vent temperature sender G151
  189
• 8.7 Removing and installing rear vent temperature sender G174
  190
• 8.8 Removing and installing footwell vent temperature sender G192
  191