210
Driving
NOTE: As soon as the hazardous situation is cleared, place the DPF switch
on the control panel back in its neutral position. If you block regeneration, it
remains blocked even after restarting the engine. This may result in rapid
loading of the diesel particulate filter.
A pop-up screen showing the warning text 'Regeneration inhibit ' is shown
on the master display. This happens every key cycle and with intervals as
long as the switch is in the 'OFF' position while the system tries to start a
regeneration.
High Exhaust System Temperatures (HEST)
NOTE: During and shortly after a regeneration event, the gases exiting the
exhaust system may reach high temperatures!
To make the driver aware of these high temperatures, the HEST (High
Exhaust System Temperature) warning indicator lights up as soon as the
vehicle speed drops to a level where it may become hazardous. To
prevent hazardous situations, the DPF switch can be used to stop
regeneration; however, the HEST warning indicator will not disappear
while the exhaust gas temperature remains high.
Do not park in an area where people or combustible vapours and
materials are less than 2 metres from the vehicle, and always park
outdoors. Hot exhaust gases produced during regeneration can ignite an
explosion, cause a fire or harm bystanders.
Severe over-temperatures
In the case of system malfunction, the EAS system can open a red pop-up screen
showing the HEST warning symbol and the text 'Severe exhaust overheating' followed
by 'STOP' and 'Switch off engine immediately' at vehicle standstill. When this pop-up
appears, the vehicle must be parked in a safe location as soon as possible, and the
engine must be stopped to prevent further damage to the Emission Aftertreatment
System.
DW63246305.book Page 210 Friday, March 22, 2019 4:54 PM
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