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 for working on vehicles with high-voltage system
  1
• 1.3 Safety precautions when working in the vicinity of high-voltage components
  2
• 1.4 Safety measures when working on vehicles with a start/stop system
  3
• 1.6 Safety precautions when working on the cooling system
  3
• 1.7 Safety precautions when handling refrigerants
  3
• 1.8 Safety precautions for working on vehicles with auxiliary/supplementary heater
  4
• 2 General information
  6
• 2.1 Type plates
  6
• 2.2 Notes concerning odours in air conditioned vehicles
  7
• 2.3 Notes for vehicles with start-stop system
  8
• 2.4 Notes on dust and pollen filter
  9
• 3 Repair notes
  10
• 3.1 Rules for cleanliness
  10
• 3.2 Nuts and bolts
  10
• 3.3 Checking heater output
  11
• 3.4 Checking cooling output
  13
• 3.5 Working on refrigerant circuit
  15
• 3.6 Paint work on vehicles with air conditioning system
  16
• 3.7 Refrigerant circuit seals
  16
• 4 Technical data
  17
• 4.1 Refrigerant capacity
  17
• 4.2 Refrigerant oil capacities
  17
• 4.3 Oil distribution
  18
• Heating
  19
• 1 Overview of fitting locations - heating
  19
• 1.1 Overview of fitting locations - components not located in passenger compartment
  19
• 2 Heater
  21
• 2.1 Assembly overview – heater unit
  21
• 2.2 Removing and installing flexible shafts
  23
• 3 Control motors
  28
• 3.1 Removing and installing fresh air and air recirculation flap control motor V154
  28
• 4 Air duct
  29
• 5 Operating and display unit
  30
• 5.1 Overview of operating and display unit
  30
• 5.2 Removing and installing operating and display unit
  32
• 6 Other controlling and regulating components
  35
• Air conditioning system
  36
• 1 Overview of fitting locations - air conditioning system
  36
• 1.1 Overview of fitting locations - components not located in passenger compartment
  36
• 2 Refrigerant circuit
  41
• 2.1 System overview - refrigerant circuit
  41
• 2.2 Assembly overview – condenser
  43
• 2.3 Removing and installing high-pressure sender G65
  44
• 2.4 Removing and installing expansion valve
  45
• 2.5 Removing and installing condenser
  50
• 2.6 Removing and installing desiccant bag or cartridge
  53
• 3 Air conditioner compressor
  78
• 3.1 Assembly overview – drive unit of air conditioner compressor
  78
• 3.2 Removing air conditioning compressor from and installing on bracket
  79
• 3.3 Removing and installing air conditioner compressor
  83
• 3.4 Checking high-pressure safety valve on air conditioner compressor
  92
• 4 Control motors
  94
• 4.1 Overview of fitting locations – control motors at front
  94
• 4.2 Removing and installing temperature flap control motor V68
  96
• 4.3 Removing and installing centre flap control motor V70
  98
• 4.4 Removing and installing defroster flap control motor V107
  99
• 4.5 Removing and installing air recirculation flap control motor V113
  101
• 4.6 Removing and installing left temperature flap control motor V158
  105
• 4.7 Removing and installing right temperature flap control motor V159
  107
• 4.8 Removing and installing fresh air/air recirculation, air flow flap control motor V425
  109
• 4.9 Removing and installing air distribution flap control motor V428
  112
• 5 Front heater and air conditioning unit
  113
• 5.1 Assembly overview – heater and air conditioning unit
  113
• 5.2 Assembly overview – evaporator housing
  118
• 5.3 Removing and installing evaporator
  118
• 5.4 Checking auxiliary air heater element Z35
  120
• 5.5 Removing and installing auxiliary air heater element Z35
  123
• 5.6 Removing and installing heater and air conditioning unit
  127
• 5.7 Dismantling and assembling heater and air conditioning unit
  134
• 5.8 Removing and installing air distribution housing
  136
• 5.9 Removing and installing dust and pollen filter
  138
• 5.10 Removing and installing fresh air blower V2
  140
• 5.11 Removing and installing fresh air blower control unit J126
  141
• 5.12 Removing and installing heat exchanger
  142
• 5.13 Removing and installing coolant pipes on heat exchanger
  155
• 5.14 Removing and installing evaporator temperature sensor G308
  159
• 5.15 Removing and installing condensation drain
  160
• 5.16 Checking condensation drain
  160
• 5.17 Removing and installing baffle plate
  161
• 5.18 Removing and installing fresh air blower series resistor with overheating fuse N24
  162
• 6 Air duct
  164
• 6.1 Assembly overview – air duct and air distribution in passenger compartment
  164
• 6.2 Removing and installing driver side footwell vents
  166
• 6.3 Removing and installing front passenger side footwell vents
  167
• 6.4 Removing and installing rear footwell vent
  168
• 6.5 Installing plug in air duct to centre vent
  169
• 6.6 Removing and installing air ducts
  170
• 6.7 Removing and installing forced ventilation for passenger compartment
  171
• 6.8 Checking forced ventilation for passenger compartment
  172
• 6.9 Removing and installing fresh air intake
  172
• 6.10 Removing and installing air intake duct
  173
• 6.11 Removing and installing air duct for defroster vent
  174
• 6.12 Removing and installing air duct for centre dash panel vent
  175
• 7 Operating and display unit
  176
• 7.1 Overview of operating and display unit
  176
• 7.2 Removing and installing operating and display unit
  180
• 8 Other controlling and regulating components
  183
• 8.1 Removing and installing sunlight penetration photosensor G107
  183
• 8.2 Working principles of air quality sensor G238
  184
• 8.3 Removing and installing air quality sensor G238
  186
• 8.4 Removing and installing ambient temperature sensor G17
  187
• 8.5 Removing and installing humidity sender for air conditioning system G260
  187
• 8.6 Removing and installing left vent temperature sender G150
  187
• 8.7 Removing and installing right vent temperature sender G151
  188
• 8.8 Removing and installing left footwell vent temperature sender G261
  189
• 8.9 Removing and installing right footwell vent temperature sender G262
  189