Mercedes-Benz Conecto, Manual

Page: 46 / 268

Operation
BlueTec exhaust gas cleaning system
Caution:
Observe the following if the batteries
are to be electrically isolated from the
on-board power supply for any reason,
e.g. by operation of the battery isolat-
ing switch: after switching off the engine,
wait at least five minutes before isolat-
ing the battery from the on-board power
supply. This delay is necessary to ensure
fault-free operation of the exhaust gas
cleaning system after the bus has been
restored to operation.
Note:
AdBlue freezes at a temperature of ap-
proximately -11 °C. The bus is equipped
with an AdBlue preheating system in the
factory. Winter operation is thus ensured,
even at temperatures below -11 °C.
Environmental protection
AdBlue is biologically degradable. Unless
it is handled properly, AdBlue constitutes
an environmental hazard. Do not allow
AdBlue to enter the sewage system, sur-
face water, ground water or soil in signi-
ficant volumes.
Danger. Risk of poisoning and
injury.
AdBlue is not considered a hazardous
substance according to German regula-
tions governing hazardous substances.
Nevertheless, certain points should be ob-
served when handling AdBlue.
The AdBlue line system and the related
system components are pressurised while
the engine is warm. There is a risk of
scalding from hot AdBlue spraying out
if the line system is suddenly opened.
There is also the risk of skin irritation or
damage to the eyes if AdBlue comes into
contact with the skin or eyes.
Wear protective gloves
Wear protective clothing
Wear eye protection
Work on the exhaust gas aftertreat-
ment system should only be com-
menced after approximately 4 minutes
as individual lines continue to be
flushed with compressed air even
after the engine has been switched
off.
Turn the ignition switch to the OFF
position and remove the key before
work is carried out on the SCR sys-
tem.
Allow the AdBlue line system to cool
down
Open line connections and system
component covers/caps slowly.
Collect any AdBlue which may escape
in a suitable receptacle and dispose
of it in an environmentally responsible
manner.
Do not pour AdBlue into drinking con-
tainers.
Wipe up any spilled AdBlue, especially
as there is a risk of slipping.
AdBlue collected in this way must
not be poured back into the AdBlue
supply tank.
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CONECTO (C628.3--)/08.2007 GB