Driving
5.6 Heating and air-conditioning system
5 - 68 3 302 633 en Operating Instructions GMK5250L
27.09.2017
5.6.3 Auxiliary water heater
H
The batteries will be drained if you operate the auxiliary heating system
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 the warm position.
• Switch (1) to Fan off position.
• Knob (3) pulled.
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