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 351).
Engine compartment
Opening/closing the hood
&
WARNING Risk of accident if the engine
hood is unlatched while driving
An unlocked engine hood may open up when
the vehicle is in motion and block your view.
#
Never unlatch the engine hood while
driving.
#
Before every trip, ensure that the
engine hood is latched.
&
WARNING Risk of accident and injury
when opening and closing the engine
hood
When opening or closing the engine hood, it
may suddenly drop into the end position.
There is a risk of injury for anyone in the
engine hood's range of movement.
#
Only open or close the engine hood
when there are no persons in the
engine hood's range of movement.
&
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
Certain components in the engine compart‐
ment may continue to move or suddenly
move again even after the ignition has been
switched off, e.g. the cooler fan.
Make sure of the following before performing
tasks in the engine compartment:
#
Switch the ignition off.
352
Maintenance and care
