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
  2
• 1.3 Safety measures when working on vehicles with a start/stop system
  2
• 1.4 Safety precautions when working on high-voltage system
  2
• 1.5 Safety precautions when working in the vicinity of high-voltage components
  3
• 1.6 Safety precautions when working on the cooling system
  3
• 1.7 Safety precautions when working on vehicles with auxiliary/supplementary heater
  4
• 2 Identification
  5
• 2.1 Identification of heater and air conditioning unit
  5
• 3 General information
  6
• 3.1 Notes concerning odours in air conditioned vehicles
  6
• 3.2 Notes for vehicles with start-stop system
  6
• 3.3 Type plates
  7
• 4 Repair notes
  8
• 4.1 Working on refrigerant circuit
  8
• 4.2 General repair instructions
  9
• 4.3 Refrigerant circuit seals
  9
• 4.4 Checking heater output
  10
• 4.5 Checking cooling output
  30
• 5 Technical data
  60
• 5.1 Refrigerant capacity
  60
• 5.2 Refrigerant oil capacities
  60
• 5.3 Oil distribution
  61
• Heating
  62
• 1 Heating
  62
• Air conditioning system
  63
• 1 Overview of fitting locations - air conditioning system
  63
• 1.1 Overview of fitting locations - components not located in passenger compartment
  63
• 2 Refrigerant circuit
  69
• 2.1 System overview - refrigerant circuit
  69
• 2.2 Assembly overview - condenser
  75
• 2.3 Removing and installing refrigerant circuit pressure sender G805
  77
• 2.4 Removing and installing expansion valve
  79
• 2.5 Removing and installing condenser
  86
• 2.6 Removing and installing desiccant bag or cartridge
  90
• 2.7 Removing and installing damper weight for refrigerant line, low-pressure side
  98
• 2.8 Removing and installing refrigerant pressure and temperature sender G395
  99
• 2.9 Removing and installing refrigerant shut-off valve for heater and air conditioner unit N541
  100
• 2.11 Removing and installing heat exchanger for high-voltage battery
  107
• 2.12 Removing and installing evacuating and charging valves on low and high-pressure side
  110
• 2.13 Removing and installing refrigerant line with internal heat exchanger
  112
• 2.14 Refrigerant line with restrictor
  119
• 2.17 Removing and installing refrigerant line between condenser and evaporator
  124
• 2.21 Commissioning of air conditioning system after filling refrigerant circuit
  135
• 3 Air conditioner compressor
  137
• 3.1 Assembly overview - drive unit of air conditioner compressor
  137
• 3.2 Assembly overview - pulley
  141
• 3.3 Removing air conditioning compressor from and installing on bracket
  145
• 3.4 Removing and installing air conditioner compressor
  149
• 3.5 Removing and installing high-voltage system fuse 3 S353
  156
• 3.6 Checking high-pressure safety valve on air conditioner compressor
  157
• 3.7 Removing and installing pulley
  157
• 4 Control motors
  162
• 4.1 Overview of fitting locations – front control motors
  162
• 4.4 Removing and installing air recirculation flap control motor V113
  174
• 4.5 Removing and installing left temperature flap control motor V158 with potentiometer G220
  178
• 4.6 Removing and installing right temperature flap control motor V159 with potentiometer G221
  182
• 4.7 Removing and installing rear temperature flap control motor V137
  185
• 4.10 Removing and installing air distribution flap control motor V428 with potentiometer G645
  196
• 4.11 Removing and installing air distribution flap actuation unit
  200
• 5 Front heater and air conditioning unit
  206
• 5.1 Assembly overview - heater and air conditioning unit
  206
• 5.2 Assembly overview - add-on parts of heater and air conditioning unit and of air intake box
  210
• 5.3 Assembly overview - evaporator housing
  212
• 5.4 Assembly overview - flaps and partitions in air distribution housing
  213
• 5.5 Removing and installing heater and air conditioning unit
  216
• 5.6 Dismantling and assembling heater and air conditioning unit
  221
• 5.7 Removing and installing air distribution housing
  222
• 5.8 Removing and installing holder for heater and air conditioning unit
  222
• 5.9 Removing and installing evaporator
  223
• 5.10 Removing and installing fresh air blower control unit J126
  225
• 5.11 Removing and installing dust and pollen filter
  226
• 5.12 Removing and installing fresh air blower V2
  228
• 5.15 Removing and installing heat exchanger
  233
• 5.16 Removing and installing coolant pipes on heat exchanger
  254
• 5.17 Removing and installing evaporator temperature sensor G308
  256
• 5.18 Checking condensation drain
  258
• 5.19 Removing and installing condensation drain
  259
• 5.20 Removing and installing baffle plate
  263
• 6 Air duct
  264
• 6.1 Assembly overview - air duct and air distribution in passenger compartment
  264
• 6.2 Removing and installing fresh air intake
  265
• 6.3 Removing and installing cover for fresh air intake
  267
• 6.4 Removing and installing air intake duct
  268
• 6.5 Removing and installing driver side footwell vents
  269
• 6.6 Removing and installing front passenger side footwell vents
  270
• 6.7 Removing and installing rear footwell vent
  271
• 6.8 Removing and installing air duct for rear vent
  272
• 6.9 Removing and installing dash panel air duct
  273
• 6.10 Removing and installing rear centre console vent duct
  273
• 6.11 Checking forced ventilation for passenger compartment
  274
• 6.12 Removing and installing forced ventilation for passenger compartment
  274
• 6.13 Removing and installing air duct for defroster vent
  275
• 6.14 Removing and installing air duct for centre vent
  276
• 7 Coolant circuit
  277
• 7.1 Incorporation of high-voltage heater (PTC) Z115 into coolant circuit
  277
• 7.3 Removing and installing coolant valve for high-voltage battery N688
  283
• 7.4 Removing and installing coolant valve for high-voltage battery V590
  285
• 7.5 Removing and installing high-voltage heater (PTC) Z115 / high-voltage heater (PTC) J848
  286
• 8 Operating and display unit
  291
• 8.1 Overview of operating and display unit
  291
• 8.2 Removing and installing operating and display unit
  296
• 9 Other controlling and regulating components
  299
• 9.1 Removing and installing sunlight penetration photosensor G107
  299
• 9.2 Removing and installing external air quality and humidity sensor G935
  300
• 9.3 Removing and installing ambient temperature sensor G17
  302
• 9.4 Removing and installing humidity sender for air conditioning system G260
  302
• 9.5 Removing and installing left vent temperature sender G150
  302
• 9.6 Removing and installing right vent temperature sender G151
  303
• 9.7 Removing and installing rear vent temperature sender G174
  304
• 9.8 Removing and installing footwell vent temperature sender G192
  305