Running gear
Body
Power unit
Power transmission
Vehicle electrics
Heating, ventilation, air conditioning system
Auxiliary heater
Aux. heater/heater booster
Repairing auxiliary heater
Rules for cleanliness when working on auxiliary heater (and fuel system)
Safety precautions when working on vehicles fitted with auxiliary heater
Notes on general repair work on vehicles fitted with auxiliary heater
Block diagram of components for auxiliary heater in vehicle
Diverting fuel for auxiliary heater
Checking CO2 content in exhaust gas of auxiliary heater
Incorporation of auxiliary heater into coolant circuit
Removing and installing auxiliary heater
Detaching and attaching auxiliary heater add-on components
Checking electrical components of auxiliary heater
Functional description of auxiliary heater
Operating sequence
Requirements for the sequence described on the following pages
Activation of auxiliary heating
Auxiliary heater heating mode
Deactivation of auxiliary heating
Auxiliary ventilation
Measured values and components monitored during operating sequence
Sequence with required heat output between 50 and 100 %
Sequence with required heat output less than 50 %
Actuation of heater coolant shut-off valve N279
Dismantling and assembling auxiliary heater
Block diagram of auxiliary heater
Block diagram of auxiliary heater actuation with remote control
Air conditioner with refrigerant R134a
Air conditioning