G-Class Owner's Manual - Mercedes G-Class, G-Wagon, G500, G55 ...

Controls in detail
Heater booster system*
Only on vehicles fitted with a diesel engine.
The heater booster system heats up the
vehicle interior quickly while the engine is
in its warm-up phase. It cuts in as required.
You can control the heater booster system
using the operating system.
To save diesel, you can switch off the heater
booster using:
the operating system ( page 153)
or
the switch on the centre console.
196
Switch
The switch is located on the lower section
of the centre console.
P54.25-2853-31
1 Heater booster system off
2 Indicator lamp
3 Primed for automatic cut-in
Nur fuer internen Gebrauch
Switching off
Press upper section 1 of the switch.
Indicator lamp 2 in the switch lights
up.
The heater booster system remains
switched off.
Priming for automatic cut-in
Press lower section 3 of the switch.
Indicator lamp 2 in the switch goes
out.
The heater booster system is primed
and cuts in as required.