Auxiliary heater

Chapter overview

• Technical data
  1
• 1 Safety information
  1
• 1.1 Safety precautions during work on fuel system
  1
• 1.2 Safety precautions when working on vehicles with start/stop system
  1
• 1.4 Safety precautions when working on the cooling system
  2
• 1.5 Safety precautions for working on vehicles with auxiliary/supplementary heater
  2
• 2 General information
  4
• 2.1 Type plates
  4
• 2.2 Starting conditions for auxiliary/supplementary heater
  5
• 3 Repair notes
  6
• 3.1 Rules for cleanliness
  6
• 3.2 General information
  6
• 3.3 General repair instructions
  7
• 3.4 Contact corrosion
  7
• 3.5 Nuts and bolts
  7
• 3.6 Routing and attachment of lines
  7
• 4 Hazard classification of high-voltage system
  9
• Supplementary heating
  10
• 1 Overview of fitting locations – auxiliary/supplementary heater
  10
• 1.1 Overview of fitting locations – components not located in passenger compartment
  10
• 2 Auxiliary/supplementary heater
  11
• 2.1 Overview of fitting locations – auxiliary/supplementary heater
  11
• 2.2 Assembly overview – auxiliary/supplementary heater, interior
  12
• 2.3 Assembly overview - attachments of auxiliary/supplementary heater
  14
• 2.4 Removing and installing auxiliary/supplementary heater
  15
• 2.5 Removing and installing air intake silencer
  18
• 2.6 Removing and installing recirculation pump V55
  19
• 2.7 Removing and installing exhaust system
  20
• 2.8 Removing and installing cover
  21
• 2.9 Dismantling and assembling auxiliary/supplementary heater
  23
• 2.10 Removing and installing glow plug with flame monitoring Q8
  25
• 2.11 Removing and installing temperature sensor G18 and overheating sensor G189
  25
• 2.12 Removing and installing auxiliary heater control unit J364
  26
• 2.13 Removing and installing combustion air blower 2 V385
  27
• 2.14 Pin assignment of auxiliary/supplementary heater
  27
• 3 Coolant circuit with auxiliary/supplementary heater
  28
• 3.1 Connection diagram – coolant hoses
  28
• 3.2 Removing and installing heater coolant shut-off valve N279
  30
• 4 Fuel supply
  33
• 4.1 Checking fuel delivery rate
  33
• 4.2 Removing and installing metering pump V54
  34
• 5 Regulation of auxiliary/supplementary heater
  37
• 6 Other control components
  38
• 6.1 Removing and installing ambient temperature sensor G17
  38
• 6.2 Removing and installing remote control receiver for auxiliary coolant heater R149
  38
• 7 Auxiliary air heater
  40
• 7.1 Assembly overview – auxiliary air heater
  40
• 7.2 Removing and installing auxiliary air heater
  42
• 7.3 Removing and installing air intake silencer
  47
• 7.4 Assembly overview - attachments of auxiliary/supplementary heater
  47
• 7.5 Removing and installing exhaust system
  48
• 7.6 Removing and dismantling auxiliary air heater bracket
  49
• 7.7 Removing and installing auxiliary air heater control unit J604
  51
• 7.8 Removing and installing housing
  52
• 7.9 Removing and installing burner
  54
• 7.10 Removing and installing glow plug for heater Q9
  55
• 7.12 Removing and installing combustion air blower 2 V385
  57
• 7.13 Removing and installing heat exchanger
  58
• 7.14 Removing and installing temperature sensor G18
  61
• 8 Fuel supply to auxiliary air heater
  62
• 8.1 Removing and installing metering pump 2 V386
  62
• 8.2 Checking fuel delivery rate
  63
• 9 Operating and display unit
  65
• 9.1 Principle of auxiliary air heater operation
  65
• 9.3 Removing and installing operating and display unit for auxiliary air heater
  68
• 10 Other control components of auxiliary air heater
  70
• 10.1 Function description of remote control
  70