Mercedes-Benz CL-Class 2006 Owner's Manual page 366

Heater booster system
(vehicles with auxiliary heating*)
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 filled up to the reserve fuel
level at least to ensure the heater booster sys-
tem works.
G
Risk of fire and poisoning
Exhaust fumes are produced when the heat-
er booster system is in operation. Switch off
the heater booster system therefore in con-
fined spaces without an extraction system,
e.g. in garages.
Operation of the heater booster system is
prohibited at filling stations or when your ve-
hicle is being refuelled. You must therefore
switch off the engine at filling stations.
Heater booster system (vehicles with auxiliary heating*)
P83.70-4943-31
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 the en-
gine is running.
Push rocker switch 1 briefly up or
down.
Indicator lamp Heater booster
system
On switched on
Off switched off
Controls
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