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
tires 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 270).
Engine compartment
Opening and closing the hood
&
WARNING Risk of accident due to driv‐
ing with the hood unlocked
The hood may open and block your view.
#
Never release the hood when driving.
#
Before every trip, ensure that the hood
is locked.
&
WARNING Risk of accident and injury
when opening and closing the hood
The hood may suddenly drop into the end
position.
There is a risk of injury for anyone in the
hood's range of movement.
#
Open or close the hood only when there
is nobody in the hood's range of move‐
ment.
&
WARNING Danger of burns when open‐
ing the hood
If you open the hood when the engine has
overheated or during a fire in the engine
compartment, you could come into contact
with hot gases or other escaping operating
fluids.
#
Before opening the hood, allow the
engine to cool down.
#
In the event of a fire in the engine com‐
partment, keep the hood closed and
call the fire service.
&
WARNING Risk of injury due to moving
parts
Components in the engine compartment may
continue running or start up suddenly, even if
the ignition is switched off.
Make sure of the following before performing
tasks in the engine compartment:
#
Switch the ignition off.
Maintenance and care
271
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