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Benefits & Arguments
Quick warming of the interior to a pleasant temperature
Increased heating output aids quick defrosting of the windows
This system is particularly recommended for use in cold climates. The very high thermal
efficiency of the diesel engines means that at extremely low ambient temperatures their
thermal energy may not always be sufficient to guarantee quick heating and a comfortable
level of warmth in the cab. The auxiliary heating function allows the interior to be warmed
even before the engine is started. The driver can therefore step into a pleasantly warm
vehicle straight away.
Remarks
The heater booster/pre-heater functions cannot be operated if the fuel level falls below
15 liters [4 gallons].
HZ5 requires H13 to be fitted to allow for the excess heat produced during booster mode
to be dispersed over the additional heat exchange in H13.
Note:
As of 01/2010 US emission regulations require the heater booster to be only optional
with outside temperatures below < 4∘C (39.2∘F).
©2015 Mercedes-Benz USA, LLC / Daimler Vans USA, LLC
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