Driving
5.6 Heating and air-conditioning system
Operating manual GMK 6400 3 112 993 en 5 - 75
12.07.2013
5.6.3 Auxiliary water heater
H
The batteries will run down 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,
– 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 Warm setting.
• Switch (1) to Fan off setting.
• Knob (3) pressed.
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