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Vehicles with one differential lock have one
switch, vehicles with several differential locks
have a control knob.
If the interaxle differential lock is engaged and
ABS is switched on during off-road driving, there
can be interruptions in the tractive power in
switch positions 1 or 2.
The status of the differential locks is displayed in
the
Status
menu,
Axles
menu item of the multi‐
media system.
When the differential lock is engaged, the display
shows the associated status display v in yel‐
low. When the differential lock is disengaged, the
display shows the associated status display v
in grey. If the status display flashes, the differen‐
tial lock is not yet engaged/disengaged. The
engagement/disengagement conditions have not
been met, e.g. different wheel speeds. The differ‐
ential lock is engaged automatically as soon as all
engagement conditions are met.
Engage the differential locks, e.g. on slippery
road surfaces or off-road, to improve traction.
When a differential lock is engaged, the shift
range for upshifts is automatically limited for
vehicles with an automated manual transmission.
During ABS braking regulation, the interaxle dif‐
ferential locks and the engaging all-wheel drive
are deactivated and the circle in the display
flashes. When ABS braking regulation ceases, the
interaxle differential locks and the all-wheel drive
are engaged again.
Vehicles with an automated manual transmis‐
#
sion: select the manual drive program to
avoid undesired gear changes and interrup‐
tions in the tractive power (
To switch on: vehicles with one differential
lock
Stop the vehicle.
#
Press the i button at the top.
#
The indicator lamp on button i lights up.
The indicator lamp i in the instrument
cluster lights up.
An event message with the current status of
the differential locks is displayed in the instru‐
ment cluster.
To switch off: vehicles with one differential
lock
Press the i button.
#
The indicator lamp in the i goes out.
An event message with the current status of
the differential locks is displayed in the instru‐
ment cluster.
To switch on: vehicles with several differen‐
tial locks
%
The individual differential locks can only be
selected one after the other.
Stop the vehicle.
#
Turn the control knob of the differential locks
#
to position 1.
The interaxle differential locks in the axle
through drive/transfer case are engaged.
The i indicator lamp in the instrument
cluster lights up.
Vehicles with engaging all-wheel drive: the
indicator lamp À lights up.
Turn the control knob of the differential locks
#
to position 2.
The interwheel differential locks on the rear
axles are engaged.
Turn the control knob of the differential locks
#
to position 3.
The interwheel differential locks on the front
axles are engaged.
The indicator lamp ! lights up.
To switch off: vehicles with several differen‐
tial locks
%
Vehicles with engaging all-wheel drive
(code G4E): if possible, disengage the inter‐
axle differential lock while still on loose
ground and not on a high-grip road surface.
Otherwise, disengaging the interaxle differen‐
page 216).
/
tial lock can lead to a wind-up shock and a
noticeable jolt in the cab. Different tyre diam‐
eters between the front and rear axles can
also lead to a noticeable wind-up shock when
the interaxle differential lock is disengaged.
Avoid a difference of more than 3% between
the tyre diameters of the front and rear axles.
Turn the switch of the differential locks to
#
position g.
When switching from position 3 to position
2: the indicator lamp ! goes out.
The differential locks are disengaged. The dif‐
ferential lock indicators in the display go out.
The i indicator lamp in the instrument
cluster goes out.
Vehicles with engaging all-wheel drive: the
indicator lamp À goes out.
Driving mode 231
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