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 working on vehicles with a start/stop system
  1
• 1.3 Safety precautions when working on high-voltage system
  2
• 1.4 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 handling refrigerants
  3
• 1.8 Safety precautions for working on vehicles with auxiliary heater
  4
• 1.9 Safety precautions when working on SCR system
  5
• 2 General information
  7
• 2.1 Type plates
  7
• 2.2 Notes concerning odours in air conditioned vehicles
  8
• 3 Repair notes
  9
• 3.1 Rules for cleanliness
  9
• 3.2 General notes
  9
• 3.3 General repair instructions
  9
• 3.4 Contact corrosion
  10
• 3.5 Nuts and bolts
  10
• 3.6 Line routing and attachment
  10
• 3.7 Fitting radiators and condensers
  11
• 3.8 Checking cooling output
  11
• 3.9 Working on refrigerant circuit
  12
• 3.10 Refrigerant circuit seals
  13
• 4 Technical data
  15
• 4.1 Refrigerant capacity
  15
• 4.2 Refrigerant oil capacities
  15
• 4.3 Oil distribution
  16
• Heating
  17
• 1 Heating
  17
• Air conditioning system
  18
• 1 Overview of fitting locations - air conditioning system
  18
• 1.1 Overview of fitting locations - components not located in passenger compartment
  18
• 2 Refrigerant circuit
  21
• 2.1 System overview - refrigerant circuit
  21
• 2.2 Assembly overview - refrigerant lines
  23
• 2.3 Assembly overview - condenser
  26
• 2.4 Assembly overview - heat exchanger for high-voltage battery
  27
• 2.5 Removing and installing refrigerant circuit pressure sender G805
  28
• 2.6 Removing and installing refrigerant pressure and temperature sender G395
  30
• 2.7 Removing and installing refrigerant pressure and temperature sender 2 G826
  33
• 2.9 Removing and installing refrigerant line with internal heat exchanger
  40
• 2.10 Removing and installing expansion valve
  43
• 2.11 Removing and installing condenser
  46
• 2.12 Separating and connecting refrigerant lines on condenser
  50
• 2.13 Removing and installing desiccant bag or cartridge
  52
• 2.15 Commissioning air conditioning system after filling refrigerant circuit
  56
• 2.19 Removing and installing refrigerant line in plenum chamber
  65
• 2.20 Removing and installing leadthrough for refrigerant lines into plenum chamber
  68
• 2.21 Detaching and assembling connections of refrigerant lines
  71
• 2.22 Disconnecting and connecting refrigerant lines
  73
• 2.23 Removing and installing heat exchanger for high-voltage battery
  75
• 2.24 Removing and installing refrigerant expansion valve 1 N636
  80
• 2.25 Commissioning air conditioning system after filling refrigerant circuit
  83
• 3 Air conditioner compressor
  85
• 3.1 Assembly overview - drive unit of air conditioner compressor
  85
• 3.2 Assembly overview - pulley
  91
• 3.3 Removing air conditioning compressor from and installing on bracket
  92
• 3.4 Removing and installing air conditioner compressor
  99
• 3.5 Removing and installing pulley
  114
• 4 Control motors
  121
• 4.1 Overview of fitting locations – front control motors
  122
• 4.2 Assembly overview - front control motors
  128
• 4.3 General notes and procedure for removal and installation of control motors
  134
• 4.4 Removing and installing defroster flap control motor V107
  135
• 4.5 Removing and installing left footwell flap control motor V108
  138
• 4.6 Removing and installing right footwell flap control motor V109
  140
• 4.7 Removing and installing left centre vent control motor V110
  143
• 4.8 Removing and installing right centre vent control motor V111
  145
• 4.9 Removing and installing air recirculation flap control motor V113
  147
• 4.10 Removing and installing rear temperature flap control motor V137
  149
• 4.11 Removing and installing left temperature flap control motor V158
  151
• 4.12 Removing and installing right temperature flap control motor V159
  153
• 4.13 Removing and installing right B-pillar and footwell shut-off flap control motor V211
  156
• 4.14 Removing and installing left B-pillar and footwell shut-off flap control motor V212
  157
• 4.15 Removing and installing left side vent control motor V299
  159
• 4.16 Removing and installing right side vent control motor V300
  161
• 4.17 Removing and installing rear left temperature flap control motor V313
  163
• 4.18 Removing and installing rear right temperature flap control motor V314
  165
• 4.19 Removing and installing rear left chest vent control motor V315
  167
• 4.20 Removing and installing rear right chest vent control motor V316
  168
• 4.21 Removing and installing rear air distribution control motor V427
  170
• 4.22 Removing and installing fresh air flap control motor V438
  172
• 4.23 Removing and installing rear left air distribution control motor V593
  174
• 4.24 Removing and installing rear right air distribution control motor V594
  176
• 4.25 Removing and installing control motor bracket
  177
• 5 Front heater and air conditioning unit
  194
• 5.2 Assembly overview – heater and air conditioning unit
  196
• 5.3 Assembly overview - air intake box of heater and air conditioning unit
  196
• 5.4 Assembly overview – evaporator housing
  197
• 5.5 Removing and installing evaporator
  198
• 5.6 Removing and installing auxiliary air heater element Z35
  198
• 5.7 Removing and installing heater and air conditioning unit
  201
• 5.8 Dismantling and assembling heater and air conditioning unit
  207
• 5.9 Removing and installing air distribution housing
  210
• 5.10 Removing and installing dust and pollen filter
  210
• 5.11 Removing and installing fresh air blower V2
  211
• 5.12 Removing and installing fresh air blower control unit J126
  212
• 5.13 Removing and installing heat exchanger
  213
• 5.14 Removing and installing coolant pipes on heat exchanger
  223
• 5.15 Removing and installing evaporator temperature sensor G308
  224
• 5.16 Removing and installing condensation drain
  225
• 5.17 Checking condensation drain
  227
• 6 Air duct
  228
• 6.1 Assembly overview - air duct and air distribution in passenger compartment
  228
• 6.2 Assembly overview - rear air distribution housing
  234
• 6.3 Air intake and air outlet openings
  235
• 6.4 Removing and installing driver side footwell vents
  237
• 6.5 Removing and installing front passenger side footwell vents
  237
• 6.6 Removing and installing air ducts
  239
• 6.7 Removing and installing forced ventilation for passenger compartment
  250
• 6.8 Checking forced ventilation for passenger compartment
  252
• 6.9 Removing and installing fresh air intake
  252
• 6.10 Removing and installing water drain of plenum chamber
  254
• 6.11 Checking water drain of plenum chamber
  255
• 6.12 Removing and installing air duct for defroster vent
  255
• 6.13 Removing and installing rear air distribution housing
  256
• 6.14 Removing and installing cold air hose of glove compartment
  257
• 6.15 Removing and installing connection for cold air hose of glove compartment
  258
• 6.16 Removing and installing valve for cold air hose of glove compartment
  259
• 7 Coolant circuit
  260
• 7.2 Bleeding coolant circuit
  266
• 8 Operating and display unit
  268
• 8.1 Overview of operating and display unit
  268
• 8.2 Removing and installing operating and display unit
  272
• 9 Other controlling and regulating components
  275
• 9.1 Removing and installing ambient temperature sensor G17
  275
• 9.2 Removing and installing left footwell vent temperature sender G261
  276
• 9.3 Removing and installing right footwell vent temperature sender G262
  276
• 9.4 Removing and installing rear left footwell temperature sensor G309
  277
• 9.5 Removing and installing rear right footwell temperature sensor G310
  277
• 9.6 Removing and installing air humidity, rain and light sensor G823
  277
• 9.7 Removing and installing temperature sensor for left side vent G911
  278
• 9.8 Removing and installing temperature sensor for right side vent G912
  278
• 9.10 Removing and installing external air quality and humidity sensor G935
  279
• 9.11 Removing and installing thermal management control unit J1024
  280