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If the SmartKey is in starter switch
position 0 or 1, an alarm will sound if the
transfer case is in Neutral and the driver’s
door is opened.
Switch the transfer case to gear position
HIGH or LOW.
Differential locks
Differential locks improve the vehicle’s
tractive power off-road. Switch differential
locks
R
for off-road driving
R
to switch the ABS off during off-road driving
R
for driving through water
R
when driving on deep snow and icy or
fouled surfaces
!
Do not switch the front axle differential
lock when driving around tight corners. This
restricts steering ability.
!
When driving off-road, apply only
moderate pressure to the accelerator pedal
if the differential locks are switched on.
When operating the vehicle on a single-axle
dynamometer – no matter how briefly – you
must
R
raise the axle not being driven
or
R
disconnect the drive shaft
and
R
switch the transfer case differential lock.
Otherwise the transfer case can be
damaged, which is not covered by the
Mercedes-Benz Limited Warranty.
G
Warning!
Never drive on pavement with differential
locks switched.
Steering control will be strongly affected with
the differential locks activated.
The ABS, BAS, and ESP
®
are switched off
automatically when the transfer case
differential lock is activated.
For more information on off-road driving, see
“Off-road driving” (Y page 179).
A few words about differentials and
differential locks
When a vehicle negotiates a turn, wheels on
the outside of the curve must travel farther
and rotate faster than the inside wheels. The
differential, the operation of a set of gears
that allows the powered wheels in a vehicle
to turn at different speeds, makes this
essential function possible.
The drawback is that the differential also
sends most of the engine’s power to the
wheel with the least load or strain on it. For
example, if one of a vehicle’s powered wheels
sits on a patch of snow and spins because
there is no traction, all of the engine’s power
will go to that wheel because the power will
take the path of least resistance. Meanwhile,
the opposite wheel, sitting on dry pavement
where it could get enough grip to start the
vehicle moving, sits idle because it receives
no power.
The 4-ETS addresses this problem and
provides for good control and steering ability
by automatically slowing the slipping wheel
and thus increasing the power to the other
non-slipping drive wheels to get the vehicle
moving. The ESP
®
and the 4-ETS in this
vehicle feature such intelligent limited-slip
differential technology, ideally suited for on-
road and light off-road driving. Transfer case
position LOW (Y page 91) also enhances off-
road driving capabilities.
More extreme off-road conditions may call for
another solution, engaging a differential lock
or preventing the differential from operating
altogether. This vehicle comes with three
differential locks: front, transfer case
(center), and rear. Each can be engaged
simply by pushing dashboard-mounted
Differential locks
93
Controls in detail
463_AKB; 2; 52, en-US
d2ureepe, Version: 2.11.7.1
2008-12-02T10:52:11+01:00 - Seite 93
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