fied based on the actual operating conditions
and/or loads.
Examples of arduous operating conditions:
R
regular city driving with frequent intermedi‐
ate stops
R
mainly short-distance driving
R
frequent operation in mountainous terrain or
on poor road surfaces
R
when the engine is often left idling for long
periods
R
operation in particularly dusty conditions
and/or if air-recirculation mode is frequently
used
In these or similar operating conditions, have the
interior air filter, engine air cleaner, engine oil
and oil filter etc. changed more frequently. The
tyres must be checked more frequently if the
vehicle is operated under increased loads. Fur‐
ther information can be obtained at a qualified
specialist workshop.
Battery disconnection periods
The ASSYST PLUS service interval display
can only calculate the service due date when
the battery is connected.
#
Note down the service due date displayed on
the instrument display before disconnecting
the battery (/ page 445).
Engine compartment
Active bonnet (pedestrian protection)
Operation of the active bonnet (pedestrian
protection)
In certain accident situations, the risk of injury
to pedestrians can be reduced by the actuation
of the active bonnet. The rear area of the engine
bonnet is raised by approximately 70 mm.
For the drive to the workshop, reset the trig‐
gered active bonnet yourself. After the active
bonnet has been triggered, pedestrian protection
may be limited.
A qualified specialist workshop must re-instate
the full functionality of the active bonnet.
The active bonnet is not available in all coun‐
tries.
Resetting the active bonnet
&
WARNING Risk of burns from hot com‐
ponent parts in the engine compartment
Certain components in the engine compart‐
ment can be very hot, e.g. the engine, the
radiator and parts of the exhaust system.
#
Allow the engine to cool down and only
touch component parts described in
the following.
446
Maintenance and care
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