Heater Booster System - Mercedes-Benz S 350 Owner's Manual

Controls

Heater booster system*

Heater booster system*
The heater booster system helps the en-
gine to reach its operating temperature
more quickly after it is started, and helps
the interior to warm up more quickly.
The heater booster system switches itself
on if:
the outside temperature is below 8 °C
the coolant temperature is below
70 °C
i
The tank must be at least full to the reserve
fuel level to ensure that the heater booster sys-
tem can function.
G
Risk of fire and poisoning
Exhaust fumes are produced when the heat-
er booster system is in operation. You
should therefore switch off the heater
booster system in confined spaces without
an extraction system, e.g. in a garage.
Heater booster system operation is prohibit-
ed at filling stations or when your vehicle is
being refuelled. You must therefore switch
off the engine at filling stations.
354
P83.70-4813-31
Vehicles without auxiliary heating
1 To switch the heater booster system on
or off
2 Indicator lamp
Vehicles with auxiliary heating*
1 To switch the heater booster system on
or off
2 Indicator lamp
You can also switch on the heater booster
system manually to create a more comfort-
able temperature, e.g. at outside tempera-
tures above 9 °C.
To switch on or off: make sure that
the engine is running.
Push rocker switch 1 briefly up or
down.
Indicator Heater booster system
lamp
on switched on
off switched off