Auxiliary heater

Chapter overview

• Technical data
  1
• 1 Safety instructions
  1
• 1.1 Safety precautions for working on vehicles with supplementary heater
  1
• 1.2 Safety precautions for working on vehicles with 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
• 2 General notes
  4
• 2.1 Starting conditions for supplementary heater
  4
• 2.2 Notes for vehicles with a start-stop system
  5
• 2.3 Notes on supplementary heater operation in vehicles with diesel engine
  5
• 2.4 Rules for cleanliness for working on the supplementary heater and the fuel system
  5
• 2.5 Identification plates
  6
• 3 Repair notes
  9
• 3.1 General repair instructions
  9
• Supplementary heating
  10
• 1 Fitting location overview - auxiliary/supplementary heater
  10
• 1.1 Location overview - supplementary heater components
  10
• 2 Supplementary heater
  13
• 2.1 Fitting location overview - auxiliary/supplementary heater
  13
• 2.2 Assembly overview - supplementary heater, interior
  14
• 2.3 Removing and installing supplementary heater
  17
• 2.4 Dismantling and assembling supplementary heater
  21
• 2.5 Removing and installing air intake silencer
  23
• 2.6 Removing and installing circulation pump V55
  23
• 2.7 Removing and installing silencer with bracket
  25
• 2.8 Removing and installing exhaust system
  26
• 2.9 Removing and installing supplementary heater bracket
  27
• 2.10 Removing and installing cover
  27
• 2.11 Removing and installing glow plug with flame monitoring Q8
  27
• 2.13 Connector pin assignment for supplementary heater
  29
• 3 Coolant circuit with supplementary heater
  33
• 3.1 Schematic diagram - coolant hoses
  33
• 3.2 Removing and installing heater coolant shut-off valve N279
  41
• 4 Fuel supply
  44
• 4.1 Location overview - fuel supply
  44
• 4.2 Removing and installing metering pump V54
  45
• 4.3 Testing quantity of fuel delivered
  47
• 5 Regulation of supplementary heater
  50
• 5.1 Functional description
  50
• 5.2 Supplementary heating mode
  51
• 5.3 Auxiliary heating mode
  51
• 5.4 Switching off supplementary heater
  51
• 6 Other control components
  53
• 6.1 Removing and installing ambient temperature sensor G17
  53
• 6.2 Removing and installing remote control receiver for auxiliary coolant heater R149
  53
• 6.3 Functional description of remote control for supplementary heater
  55