R
F
requent operation in mountainous terrain or
on poor road surfaces
R
When the engine is oen le 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 lter, air lter, engine oil and oil lter,
for example, changed more frequently. Check the
tyres more frequently if the vehicle is operated
under increased stress. Further information can
be obtained at a qualied specialist workshop.
Battery disconnection periods
The ASSYST PLUS service interval display can cal-
culat
e the service due date only when the battery
is connected.
#
Display and note down the service due date
on t
he instrument display before disconnect-
ing the battery (/ page 361).
Engine compartment
Opening and closing the bonnet
&
WARNING Risk of accident due t
o driving
with the bonnet unlocked
The bonnet may open and block your view.
#
Never release the bonnet when driving.
#
Before every trip, ensure that the engine
bonnet is locked.
&
WARNING Risk of accident and injur
y
when opening and closing the bonnet
The bonnet may suddenly drop into the end
position.
There is a risk of injury for anyone in the
engine bonnet's range of movement.
#
Do not open or close the bonnet if there
is a per
son in the bonnet's range of
movement.
&
WARNING Risk of bur
ns when opening the
bonnet
If you open the bonnet in the event of an over-
heated engine or re in the engine compart-
ment, the following situations may occur:
R
You may come into contact with hot gases.
R
You may come into contact with other
escaping hot operating uids.
#
Before opening the bonnet, allow the
engine t
o cool down.
#
In the event of a r
e in the engine com-
partment, keep the bonnet closed and
call the re service.
&
WARNING Risk of injur
y due to moving
parts
Components in the engine compartment can
continue to run or start unexpectedly even
when the ignition is switched o.
Observe the following before performing tasks
in the engine compartment:
362
Maintenance and care
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