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 when working on vehicles with a start/stop system
  1
• 1.4 Safety precautions when working on the cooling system
  2
• 1.5 Safety precautions when handling refrigerants
  2
• 1.6 Safety precautions when working on vehicles with auxiliary/supplementary heater
  3
• 1.7 Safety precautions when working on the SCR system
  4
• 2 General information
  6
• 2.1 Type plates
  6
• 2.2 Notes concerning odours in air conditioned vehicles
  6
• 3 Repair instructions
  8
• 3.1 Rules for cleanliness
  8
• 3.2 General information
  8
• 3.3 General repair instructions
  8
• 3.4 Contact corrosion
  9
• 3.5 Nuts and bolts
  9
• 3.6 Routing and attachment of lines
  9
• 3.7 Fitting radiators and condensers
  9
• 3.8 Working on refrigerant circuit
  9
• 3.9 Refrigerant circuit seals
  11
• 4 Technical data
  12
• 4.1 Refrigerant capacity
  12
• 4.2 Refrigerant oil capacities
  12
• 4.3 Oil distribution
  13
• Heating
  14
• 1 Dismantling and assembling heater unit
  14
• 1.1 Removing and installing motor for front Bitron blower regulation V305
  15
• 1.2 Removing and installing sender for front Bitron blower regulation G462
  16
• 1.3 Removing and installing intake duct
  17
• 1.4 Removing and installing dust and pollen filter with activated charcoal filter insert
  18
• 1.5 Function of dust and pollen filter with activated charcoal filter insert
  18
• 1.6 Removing vents
  20
• 1.7 Removing and installing fresh air/air recirculation flap control motor V154
  21
• 1.8 Removing and installing heat exchanger
  21
• 1.9 Removing and installing auxiliary air heater element Z35
  24
• 1.10 Removing and installing circulation pump V55 for engine codes AXQ, BHX
  27
• 1.11 Checking ventilation
  27
• 1.12 Removing and installing air quality sensor G238
  28
• 1.13 Principle of operation of air quality sensor G238
  29
• 1.14 Removing and installing fresh air intake duct temperature sensor G89
  30
• 1.15 Removing and installing ambient temperature sensor G17
  31
• Air conditioning system
  32
• 1 Climatronic air conditioning with automatic regulation
  32
• 1.1 Procedure when checking and adjusting components
  32
• 1.5 Function of rear Climatronic operating and display unit E265 , “4-C” only
  39
• 1.6 Overview - Climatronic components
  40
• 1.7 Checking condensate drain hose with valve
  41
• 1.8 Removing and installing high-pressure sender G65
  41
• 2.1 Manual air conditioning system - passenger compartment
  46
• 2.2 Removing and installing manual air conditioning system and Climatronic control unit J255
  47
• 2.4 Removing and installing roof temperature switch G86
  48
• 2.5 Climatronic - passenger compartment
  49
• 2.6 Removing and installing right footwell vent temperature sender G262
  50
• 2.7 Removing and installing left footwell vent temperature sender G261
  50
• 2.8 Removing and installing front right chest vent temperature sensor G386
  51
• 2.9 Removing and installing front left chest vent temperature sensor G385
  51
• 2.11 Renewing control motors on heater and air conditioner unit
  52
• 2.12 Overview of control motors on heater and air conditioner unit
  52
• 2.16 Removing and installing left temperature flap control motor V158
  59
• 2.18 Removing and installing right temperature flap control motor V159
  60
• 2.23 Removing and installing high-pressure sender G65
  66
• 2.24 Removing and installing air duct in centre console, Climatronic “2-C”
  68
• 3.1 Removing rear Climatronic operating and display unit E265
  69
• 3.2 Components and air duct for Climatronic air conditioning system “4-C”
  70
• 3.3 Moving 2nd heater and air conditioner unit, rear to service position
  73
• 3.4 Removing and installing rear left air quantity flap control motor V239
  74
• 3.5 Removing and installing rear right air quantity flap control motor V240
  75
• 3.6 Removing and installing rear left temperature flap control motor V313
  75
• 3.7 Removing and installing rear right temperature flap control motor V314
  76
• 3.8 Removing and installing rear left vent temperature sender G405
  76
• 3.9 Removing and installing rear right vent temperature sender G406
  77
• 3.10 Removing and installing motor for rear Bitron blower regulation V306
  77
• 3.11 Removing and installing rear blower regulation sender G463
  78
• 3.12 Checking rear condensation drain hose with valve
  78
• 3.13 Removing and installing heat exchanger with rear heater and air conditioner unit installed
  78
• 4 Air conditioner compressor
  81
• 4.1 Loosening and tightening input shaft of air conditioner compressor
  81
• 4.2 Removing and installing input shaft of air conditioner compressor
  82
• 4.3 Removing and installing drive plate with overload protection
  82
• 4.4 Checking and adjusting true running of drive plate with overload protection
  83
• 4.5 Unbolting drive plate from and bolting onto air conditioner compressor
  83
• 4.6 Conversion from Hardy disc to Gates coupling
  85
• 4.7 Removing and installing mounting with freewheel on air conditioner compressor
  86
• 5.2 Repairing refrigerant circuit components in engine compartment (2-C / 4-C)
  92
• 5.5 Removing and installing air conditioner compressor, engine code BAR
  98
• 5.10 Removing and installing evacuating and charging valves, low-pressure side
  113
• 5.11 Removing and installing evacuating and charging valves, high-pressure side
  115
• 5.12 Removing dryer cartridge
  116
• 5.13 Checking high-pressure safety valve on air conditioner compressor
  118
• 5.14 Notes on installing air conditioner compressor
  119
• 5.15 Removing and installing refrigerant temperature sender G454
  121
• 5.16 Removing and installing expansion valve
  122
• 5.17 Removing and installing rear expansion valve
  123
• 5.18 Removing and installing condenser
  124
• 5.19 Removing and installing heater and air conditioning unit
  126
• 5.20 Dismantling and assembling heater and air conditioning unit
  127
• 5.21 Removing and installing evaporator
  129
• 5.22 Repairing components of refrigerant circuit of 2nd heater and air conditioning unit “4-C”
  130
• 5.23 Removing and installing 2nd heater and air conditioning unit at rear
  132
• 5.24 Dismantling and assembling 2nd heater and air conditioning unit
  136
• 5.25 Removing and installing evaporator with heater and air conditioner unit installed
  137