Auxiliary heater

Chapter overview

• Technical data
  1
• 1 Notes on safety
  1
• 1.1 Safety precautions for working on vehicles with auxiliary/supplementary heater
  1
• 1.2 Safety measures for when working on vehicles with a start-stop system
  2
• 1.3 Safety precautions when working on the fuel system
  2
• 1.4 Safety precautions when working on cooling system
  3
• 1.6 Safety precautions when working in vicinity of high-voltage components
  3
• 2 General notes
  5
• 2.1 Starting conditions for auxiliary/supplementary heater
  5
• 2.2 Notes for vehicles with a start-stop system
  6
• 2.4 Identification plates
  7
• 3 Repair notes
  10
• 3.1 General repair instructions
  10
• Supplementary heating
  11
• 1 Fitting location overview - auxiliary/supplementary heater
  11
• 1.1 Overview of fitting locations - auxiliary heater components
  11
• 2 Auxiliary/supplementary heater
  13
• 2.1 Fitting location overview - auxiliary/supplementary heater
  13
• 2.2 Assembly overview - auxiliary heater, interior
  15
• 2.3 Removing and installing auxiliary/supplementary heater
  16
• 2.4 Dismantling and assembling auxiliary/supplementary heater
  19
• 2.5 Removing and installing air intake silencer
  21
• 2.6 Removing and installing circulation pump V55
  21
• 2.7 Removing and installing silencer with bracket
  23
• 2.8 Removing and installing exhaust system
  24
• 2.9 Removing and installing auxiliary/supplementary heater bracket
  24
• 2.10 Removing and installing cover
  25
• 2.11 Removing and installing glow plug with flame monitoring Q8
  25
• 2.13 Removing and installing auxiliary heater control unit J364
  26
• 2.14 Dismantling and assembling burner unit
  26
• 3 Coolant circuit with auxiliary heater
  28
• 3.1 Coolant hose schematic diagram
  28
• 3.2 Bleeding coolant circuit of auxiliary/supplementary heater
  30
• 3.3 Removing and installing coolant pipes for auxiliary/supplementary heater
  31
• 4 Fuel supply
  34
• 4.1 Fittings location overview - fuel supply
  34
• 4.2 Testing quantity of fuel delivered
  35
• 4.3 Removing and installing metering pump V54
  36
• 5 Regulation of auxiliary/supplementary heater
  39
• 5.1 Functional description
  39
• 5.2 Supplementary heating mode
  40
• 5.3 Auxiliary heater mode
  40
• 5.4 Switching off auxiliary heater
  41
• 6 Other controlling and regulating components
  42
• 6.1 Removing and installing ambient temperature sensor G17
  42
• 6.2 Removing and installing remote control receiver for auxiliary coolant heater R149
  42
• 6.3 Functional description of remote control for auxiliary/supplementary heater
  43