Driving
5.6 Heating and air-conditioning system
5 - 80 3 112 xxx en Operating Manual GMK6300L
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5.6.3 Auxiliary water heater
H
The batteries will be drained if you operate the auxiliary heater with the
engine switched off. You must recharge the batteries at shorter intervals if
you use the auxiliary heater frequently!
You can use the auxiliary water heater to:
– Preheat just the engine or
– Preheat the engine and driver's cab simultaneously.
Preheating
the engine
If only the engine is to be preheated, adjust the heating system as follows:
• Switch (2) to position Warm.
• Switch (1) to Fan off setting.
• Knob (3) pressed.
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