Heating, air conditioning

Chapter overview

• Technical data
  1
• 1 Notes on safety
  1
• 1.1 Safety precautions when handling refrigerants
  1
• 1.2 Safety precautions when working on vehicles with high-voltage system
  2
• 2 General notes
  4
• 2.1 Identification plates
  4
• 2.2 Notes concerning odours in air conditioned vehicles
  4
• 3 Repair notes
  5
• 3.1 Working on refrigerant circuit
  5
• 4 Technical data
  8
• 4.1 Capacities for refrigerant R134a
  8
• 4.2 Refrigerant oil
  8
• 4.3 Oil distribution
  8
• Air conditioning system
  9
• 1 Overview of fittings locations - air conditioning system
  9
• 1.1 Overview of fitting locations - components not located in passenger compartment
  9
• 2 Refrigerant circuit
  12
• 2.1 System overview - refrigerant circuit
  12
• 2.2 Assembly overview - condenser
  13
• 2.3 Removing and installing condenser
  14
• 2.4 Removing and installing high-pressure sender G65
  14
• 2.5 Removing and installing refrigerant shut-off valve for heater and air conditioner unit N541
  15
• 2.6 Removing and installing receiver with dryer
  17
• 2.7 Removing and installing evacuating and charging valves on low and high-pressure side
  19
• 3 Air conditioner compressor
  22
• 3.1 Removing and installing air conditioner compressor
  22
• 3.2 Checking excess pressure relief valve on air conditioner compressor
  25
• 4 Control motors
  27
• 4.1 Overview of fitting locations - front control motors
  27
• 4.2 Removing and installing temperature flap control motor V68
  27
• 4.3 Removing and installing defroster flap control motor V107
  27
• 4.4 Removing and installing front air distribution flap control motor V426
  28
• 5 Front heater and air conditioning unit
  29
• 5.1 Assembly overview - heater and air conditioning unit
  29
• 5.2 Removing and installing heater and air conditioning unit
  30
• 5.3 Dismantling and assembling heater and air conditioning unit
  34
• 5.4 Removing and installing evaporator
  36
• 5.5 Removing and installing fresh air blower series resistor with overheating fuse N24
  36
• 5.6 Removing and installing dust and pollen filter
  36
• 5.7 Removing and installing fresh air blower V2
  37
• 5.8 Removing and installing heat exchanger
  38
• 5.9 Assembly overview - heat exchanger for high-voltage battery
  38
• 5.11 Removing and installing evaporator temperature sensor G308
  42
• 5.12 Assembly overview - high-voltage heater (PTC)
  42
• 5.13 Removing and installing high-voltage heater (PTC) Z115 / high-voltage heater (PTC) J848
  43
• 6 Air duct
  46
• 6.1 Removing and installing exhaust ventilation for passenger compartment
  46
• 7 Operating and display unit
  47
• 7.1 Overview of operating and display unit
  47
• 7.2 Removing and installing operating and display unit
  48
• 8 Other controlling and regulating components
  49
• 8.1 Removing and installing ambient temperature sensor G17
  49
• 8.2 Removing and installing centre vent temperature sender G191
  49
• 8.3 Removing and installing footwell vent temperature sender G192
  50