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To switch on at blower speed 1:
Press the upper section, the left-hand indicator lamp in
the switch lights up.
To switch on at blower speed 2:
Press the lower section, the right-hand indicator lamp
in the switch lights up.
To switch off :
Press the switch to the middle position.
Operation is only possible when the key is turned to
position 2 in the ignition lock.
NOTE: The auxiliary heat exchanger in the load
compartment should be switched off at coolant
temperatures below 176 °F (+80 °C) to quickly de-fog
and de-ice the windshield and front side windows.
The heater either does not switch on or automatically
switches off:
• Insufficient fuel, fill up the fuel tank. Start up heater
several times, until the fuel lines are filled.
• The auxiliary heater will automatically switch off if
the fuel level is under about 4 US gal (15 l).
• The fuses in the fuse box are damaged. Electric
fuses.
• The battery voltage is too low, an undervoltage
protector switches off the heater if the battery
voltage falls below about 10 volts.
The heater motor does not run
• The battery voltage is too low, check the battery.
Batteries.
• The fuses in the fuse box are damaged.
Electric fuses.
• The heater motor is damaged.