differential MERCEDES-BENZ GL-Class 2014 X166 Owner's Manual

Cornering light function
Display message ............................ 303
Function/notes ............................. 133
Crash-responsive emergency
lighting ............................................... 137
Crosswind driving assistance ............74
Cruise control Activating ....................................... 202
Activation conditions .....................202
Cruise control lever .......................201
Deactivating ................................... 203
Display message ............................ 317
Driving system ............................... 201
Function/notes ............................. 201
Important safety notes ..................201
Storing and maintaining current
speed ............................................ .202
Cup holder
Center console .............................. 349
Important safety notes ..................348
Rear compartment .........................349
Temperature controlled .................349
Third row of seats ..........................350
Customer Assistance Center (CAC) ...28
Customer Relations Department .......28 D
Data see Technical data
Daytime running lamps
Display message ............................ 305
Function/notes ............................. 128
Switching on/off (on-board
computer) ...................................... 283
Declarations of conformity ................. 27
DEF Adding ........................................... 186
Display message ............................ 309
Filling capacity ............................... 449
Important safety notes ..................448
Delayed switch-off
Exterior lighting (on-board
computer) ...................................... 284
Interior lighting .............................. 284
Diagnostics connection ......................27
Diesel ................................................. .447
Differential locks (display message) 311Digital speedometer
.........................276
DIRECT SELECT lever see Automatic transmission
Display message
ASSYST PLUS ................................ 374
Display messages
Calling up (on-board computer) .....290
Driving systems ............................. 309
Engine ............................................ 306
General notes ................................ 290
Hiding (on-board computer) ...........290
KEYLESS-GO .................................. 323
Lights ............................................ .303
Safety systems .............................. 291
SmartKey ....................................... 323
Tires ............................................... 318
Vehicle .......................................... .320
Distance recorder
see Odometer
see Trip odometer
Distance warning (warning lamp) ....336
Distance warning function Activating/deactivating .................281
Function/notes ................................ 69
Warning lamp ................................. 336
DISTRONIC PLUS
Activating ....................................... 206
Activation conditions .....................206
Cruise control lever .......................205
Deactivating ................................... 209
Display message ............................ 315
Displays in the multifunction
displa y........................................... 210
Driving tips .................................... 211
Function/notes ............................. 203
Important safety notes ..................204
Setting the specified minimum
distance ......................................... 209
Warning lamp ................................. 336
Doors
Automatic locking (on-board
computer) ...................................... 284
Automatic locking (switch) .............. .88
Central locking/unlocking
(SmartKey) ...................................... .80
Control panel ................................... 40
Display message ............................ 321
Emergency locking ........................... 88 8
Index

conditions when temperatures are around
the freezing point.
For more information on driving with snow
chains, see (Y page 407).
For more information on driving with summer
tires, see (Y page 406).
Observe the notes in the "Winter operation"
section (Y page 406). Off-road driving
Important safety notes G
WARNING
If you drive on a steep incline at an angle or
turn when driving on an incline, the vehicle
could slip sideways, tip and rollover. There is
a risk of an accident.
Always drive on a steep incline in the line of
fall (straight up or down) and do not turn the
vehicle. G
WARNING
If the vehicle level is high, the vehicle center
of gravity is raised. This could cause the
vehicle to tip over more easily on uphill or
downhill gradients. There is a risk of an
accident.
Select the lowest possible vehicle level.
When driving off-road, sand, mud and water,
possibly mixed with oil, for example, could get
into the brakes. This could result in a reduced
braking effect or in total brake failure and also
in increased wear and tear. The braking
characteristics change depending on the
material ingressing the brakes. Clean the
brakes after driving off-road. If you detect a
reduced braking effect or grinding noises,
have the brake system checked in a qualified
specialist workshop as soon as possible.
Adapt your driving style to the different
braking characteristics.
Driving off-road increases the likelihood of
damage to the vehicle, which, in turn, can lead
to failure of the mechanical assembly or systems. Adapt your driving style to suit the
terrain conditions. Drive carefully. Have
damage to the vehicle rectified immediately
at a qualified specialist workshop.
Do not switch to transmission position N
when driving off-road. You could lose control
of the vehicle if you attempt to brake using
the service brake. If the gradient is too steep,
drive backwards in reverse gear.
General notes Read this section carefully before driving your
vehicle off-road. Practice by driving over more
gentle off-road terrain first.
Familiarize yourself with the characteristics
of your vehicle and the gear shift operation
before driving through difficult terrain.
The following driving systems are specially
adapted to off-road driving:
R
Off-road program 1 and 2 (vehicles with the
ON&OFFROAD package) (Y page 258)
R LOW RANGE off-road gear (vehicles with
the ON&OFFROAD package)
(Y page 259)
R Differential lock (vehicles with the
ON&OFFROAD package) (Y page 259)
R Off-road ABS (Y page 68)
R AIRMATIC package (vehicle level)
(Y page 217)
R DSR (Downhill Speed Regulation)
(Y page 256)
Observe the following notes:
R Stop the vehicle before starting to drive
along an off-road route.
R For vehicles with the AIRMATIC
package: select a vehicle level that is
suitable for the off-road terrain. To avoid
damaging the vehicle, make sure there is
always sufficient ground clearance.
R Check that items of luggage and loads are
stowed safely and are well secured
(Y page 345). Driving tips
197Driving and parking Z

Problems with Night View Assist Plus
Problem Possible causes/consequences and
M
MSolutions The picture quality of
Night View Assist Plus
has deteriorated. The windshield wipers are smearing the windshield.
X
Replace the wiper blades (Y page 141). The windshield is smeared after the vehicle has been cleaned in a
car wash.
X
Clean the windshield (Y page 379). There is windshield chip damage in the camera's field of vision.
X
Replace the windshield. The windshield is fogged up on the inside.
X
Defrost the windshield (Y page 160). The windshield is iced up.
X
De-ice the windshield (Y page 159). There is dirt on the inside of the windshield.
X
Clean the inside of the windshield (Y page 379).Lane Tracking package
General notes The Lane Tracking package consists of Blind
Spot Assist (Y page 243) and Lane Keeping
Assist (Y page 245).
Blind Spot Assist General notes
Blind Spot Assist uses a radar sensor system
to monitor the areas on both sides of your
vehicle. It supports you from a speed of
approximately 20 mph (30 km/h). A warning
display in the exterior mirrors draws your
attention to vehicles detected in the
monitored area. If you then switch on the
corresponding turn signal to change lanes,
you will also receive a visual and audible
collision warning. Blind Spot Assist uses
sensors in the rear bumper for monitoring
purposes. Important safety notes G
WARNING
Blind Spot Assist does not react to:
R vehicles overtaken too closely on the side,
placing them in the blind spot area
R vehicles which approach with a large speed
differential and overtake your vehicle
As a result, Blind Spot Assist may not give
warnings in such situations. There is a risk of
an accident.
Always observe the traffic conditions
carefully, and maintain a safe lateral distance.
Blind Spot Assist is only an aid. It may fail to
detect some vehicles and is no substitute for
attentive driving.
i USA only:
This device has been approved by the FCC
as a "Vehicular Radar System". The radar
sensor is intended for use in an automotive
radar system only. Removing, tampering
with, or altering the device will void any Driving systems
243Driving and parking Z

Adaptive
When
Adaptive Adaptive is selected, no warning
vibration occurs if:
R you switch on the turn signals. In this event,
the warnings are suppressed for a certain
period of time.
R a driving safety system intervenes, e.g.
ABS, BAS or ESP ®
.
R you accelerate hard, e.g. kickdown.
R you brake hard.
R you steer actively, e.g. swerve to avoid an
obstacle or change lanes quickly.
R you cut the corner on a sharp bend.
In order that you are warned only when
necessary and in good time if you cross the
lane marking, the system recognizes certain
conditions and warns you accordingly.
The warning vibration occurs earlier if:
R you approach the outer lane marking on a
bend.
R the road has very wide lanes, e.g. a
highway.
R the system recognizes solid lane markings.
The warning vibration occurs later if:
R the road has narrow lanes.
R you cut the corner on a bend. Active Driving Assistance package
General notes The Active Driving Assistance package
consists of DISTRONIC PLUS (Y page 203),
Active Blind Spot Assist (Y page 247) and
Active Lane Keeping Assist (Y page 251).
Active Blind Spot Assist General notes
Active Blind Spot Assist uses a radar sensor
system to monitor the side areas of your
vehicle which are behind the driver. A warning
display in the exterior mirrors draws your
attention to vehicles detected in the monitored area. If you then switch on the
corresponding turn signal to change lane, you
will also receive an optical and audible
warning. If a risk of lateral collision is
detected, corrective braking may help you
avoid a collision. Active Blind Spot Assist
evaluates the free space in the direction of
travel and to the side before making a course-
correcting brake application. For this, Active
Blind Spot Assist uses radar sensors which
are pointed in the direction of travel.
Active Blind Spot Assist supports you from a
speed of approximately 20 mph (30 km/h).
Important safety notes
Active Blind Spot Assist is only an aid. It may
fail to detect some vehicles and is no
substitute for attentive driving.
G
WARNING
Active Blind Spot Assist does not react to:
R vehicles overtaken too closely on the side,
placing them in the blind spot area
R vehicles which approach with a large speed
differential and overtake your vehicle
As a result, Active Blind Spot Assist may
neither give warnings nor intervene in such
situations. There is a risk of an accident.
Always observe the traffic conditions
carefully, and maintain a safe lateral distance.
i USA only: This device has been approved
by the FCC as a "Vehicular Radar System".
The radar sensor is intended for use in an
automotive radar system only. Removal,
tampering, or altering of the device will void
any warranties, and is not permitted by the
FCC. Do not tamper with, alter, or use in
any non-approved way.
Any unauthorized modification to this
device could void the user's authority to
operate the equipment.
i Canada only: This device complies with
RSS-210 of Industry Canada. Operation is
subject to the following two conditions: Driving systems
247Driving and parking Z

longer has to be pressed as far to
accelerate.
R The sporty steering curve is selected,
e.g. greater force is required when
steering.
i You cannot select the SPORT program if
LOW RANGE has been selected. The
Drive Program SPORT Not in LOW Drive Program SPORT Not in LOW
RANGE RANGE message then appears in the
multifunction display.
Snow program Select the snow program for driving in snow
with or without snow chains.
X Selector wheel : :engaged: briefly press
selector wheel :.
Selector wheel :extends.
X To select: turn selector wheel :until
indicator lamp ;comes on.
Snow indicator =appears in the
multifunction display. R
Highway level is set.
R ADS (Adaptive Damping System) adapts
comfortable damping characteristics to
the current operating and driving
conditions.
R 4ETS and the differential lock are
adapted for driving on snow-covered
roads.
R The automatic transmission selects the
automatic drive program for a
comfortable driving style that provides
for optimum fuel consumption.
R The soft accelerator pedal curve is
selected, e.g. the accelerator pedal must
be pressed significantly further to
accelerate.
R The optimum gear for pulling away is
engaged.
Trailer program Select the trailer program when towing a
trailer. Driving systems
255Driving and parking Z

X
Selector wheel :
:engaged: briefly press
selector wheel :.
Selector wheel :extends.
X To select: turn selector wheel :until
indicator lamp ;comes on.
Trailer indicator =appears in the
multifunction display.
R Highway level is set.
R ADS (Adaptive Damping System) adapts
comfortable damping characteristics to
the current operating and driving
conditions.
R The automatic transmission selects the
automatic drive program for a
comfortable driving style that provides
for optimum fuel consumption, changing
gear at optimum points.
R While pulling away, the differential locks
are engaged. Off-road driving systems
4MATIC (permanent four-wheel drive) If you fail to adapt your driving style, 4MATIC
can neither reduce the risk of accident nor
override the laws of physics. 4MATIC cannot
take account of road, weather and traffic
conditions. 4MATIC is only an aid. You are
responsible for the distance to the vehicle in
front, for vehicle speed, for braking in good
time and for staying in your lane.
! Never tow the vehicle with one axle
raised. This may damage the transfer case.
Damage of this sort is not covered by the
Mercedes-Benz Limited Warranty. All
wheels must remain either on the ground
or be fully raised. Observe the instructions
for towing the vehicle with all wheels in full
contact with the ground.
! A function or performance test should
only be carried out on a two-axle
dynamometer. Before you operate the
vehicle on such a dynamometer, please
consult a qualified workshop. You could otherwise damage the drive train or the
brake system.
4MATIC ensures that all four wheels are
permanently driven. Together with ESP ®
and
4ETS, it improves the traction of your vehicle
whenever a drive wheel spins due to
insufficient grip.
i In wintry driving conditions, the maximum
effect of 4MATIC can only be achieved if
you use winter tires (M+S tires), with snow
chains if necessary.
Further information about "Driving off-road"
(Y page 197).
DSR (Downhill Speed Regulation) Important safety notes
DSR assists you when driving downhill. It
keeps the speed of travel at the speed set on
the on-board computer. The steeper the
downhill gradient, the greater the DSR
braking effect on the vehicle. When driving on
flat stretches of road or on an uphill gradient,
the DSR braking effect is minimal or
nonexistent.
DSR controls the set speed when it is active
and the automatic transmission is in the D,
R or Nposition. By accelerating or braking,
you can always drive at a higher or a lower
speed than that set on the on-board
computer.
Further information about "Driving off-road"
(Y page 197).
If you fail to adapt your driving style, DSR can
neither reduce the risk of accident nor
override the laws of physics. DSR cannot take
account of road, weather and traffic
conditions. DSR is only an aid. You are
responsible for the distance to the vehicle in
front, for vehicle speed, for braking in good
time and for staying in your lane.
You are always responsible for keeping
control of the vehicle and for assessing
whether the downhill gradient can be
managed. DSR may not always be able to
keep to the set speed, depending on road 256
Driving systemsDriving and parking

message appears in the multifunction
display.
Off-road program 2
X
Selector wheel : :engaged: briefly press
selector wheel :.
Selector wheel :extends.
X To select: turn selector wheel :until
indicator lamp ;comes on.
Off-road indicator =appears in the
multifunction display.
R Off-road level 1 is set to +2.4 in
(+60 mm) above the highway level.
R DSR is switched on.
R The differential lock is closed.
Off-road program 2 automatically switches to
off-road program 1 if you drive faster than
30 mph (45 km/h).
Select off-road program 2 for rough terrain,
e.g. for steep and/or rough terrain or driving
on rocky terrain.
i Your vehicle has an automatically
activated differential lock for the transfer case. It controls the balance between the
front and rear axles.
The differential lock improves the vehicle’s
traction. 4ETS (Y
page 72) controls the
balance between both wheels on an axle.
You can only activate off-road program 2
when driving at speeds of 25 mph (40 km/h)
or below.
LOW RANGE off-road gear (vehicles
with the ON&OFFROAD package) Important safety notes
G
WARNING
If you select the LOW RANGE off-road gear on
a slippery road surface, the wheels could lose
traction:
R if you remove your foot from the
accelerator pedal when driving
R if off road ABS intervenes when braking
If the wheels lose traction. the vehicle can no
longer be steered. There is an increased
danger of skidding and accidents.
Never select the LOW RANGE off-road gear
when driving on slippery road surfaces. G
WARNING
If you do not wait for the transfer case gear
change process to complete, the transfer
case could remain in the neutral position. The
power transmission to the driven wheels is
then interrupted. There is a danger of the
vehicle rolling away unintentionally. There is
a risk of an accident.
Wait until the transfer case shift process is
completed.
Do not turn off the engine while changing gear
and do not shift the automatic transmission
to another position. Driving systems
259Driving and parking Z

R
uphill or downhill gradient in percentage
R on-road/off-road program selected
R condition of the differential lock for the
transfer case
R the LOW RANGE off-road gear is selected
R condition of the LOW RANGE off-road
gear
R the on-road trailer program is selected Towing a trailer
Important safety notes
G
WARNING
Installing an unsuitable ball coupling may
result in overloading of the trailer tow hitch
and the rear axle. This applies especially if the
ball coupling in question is longer or angled
differently. This could seriously impair the
driving characteristics and the trailer can
come loose. There is a risk of an accident.
You should only ever install a ball coupling
that has the permissible dimensions and that
is designed to meet your trailer-towing
requirements. Do not modify the ball coupling
or the trailer tow hitch.
You will find the values approved by the
manufacturer on the vehicle identification
plates and those for the towing vehicle under
"Technical data" ( Ypage 457). G
WARNING
If the ball coupling is not installed correctly or
not secured with the bolt provided and the
corresponding spring cotter, the trailer may
come loose. There is a risk of an accident.
Always install and secure the ball coupling as
described. Before every journey, ensure that
the ball coupling is secured with the bolt and
the corresponding spring cotter. G
WARNING
If you rest your foot on the brake pedal while
driving, the braking system can overheat. This
increases the stopping distance and can even cause the braking system to fail. There is a
risk of an accident.
Never use the brake pedal as a footrest. Never
depress the brake pedal and the accelerator
pedal at the same time.
G
WARNING
When the vehicle/trailer combination begins
to lurch, you could lose control of it. The
vehicle/trailer combination could even
rollover. There is a risk of an accident.
On no account should you attempt to
straighten up the vehicle/trailer combination
by increasing the speed. Reduce vehicle
speed and do not countersteer. Apply the
brake as necessary.
! Depressing the brake pedal constantly
results in excessive and premature wear to
the brake pads.
Please observe the manufacturer's operating
instructions for the trailer coupling if a
detachable trailer coupling is used.
Couple and uncouple the trailer carefully. If
you do not couple the trailer to the towing
vehicle correctly, the trailer could become
detached.
Make sure that the following values are not
exceeded:
R the permissible trailer drawbar noseweight
R the permissible trailer load
R the permissible rear axle load of the towing
vehicle
R the maximum permissible gross vehicle
weight of both the towing vehicle and the
trailer
The applicable permissible values, which
must not be exceeded, can be found:
R in the vehicle documents
R on the identification plates for the trailer
tow hitch and the trailer
R on the vehicle identification plate
If the values differ, the lowest value applies. Towing a trailer
263Driving and parking Z

Display messages Possible causes/consequences and
M
MSolutions ACTIVE CURVE
ACTIVE CURVE
SYSTEM Malfunction SYSTEM Malfunction The Active Curve System is faulty. The vehicle's handling
characteristics may be affected.
X
Do not drive at speeds above 50 mph (80 km/h).
X Have the vehicle checked at a qualified specialist workshop. ACTIVE CURVE ACTIVE CURVE
SYSTEM SYSTEM
Malfunction
Malfunction
see Operator's
see Operator's
Manual Manual The Active Curve System is faulty. The vehicle's handling
characteristics are severely impaired. A warning tone also sounds.
G WARNING
There is a risk of an accident.
X Drive on carefully.
X Adjust your driving style to the altered handling characteristics.
X Avoid sudden acceleration in tight bends and fast steering
movements.
X Do not drive at speeds above 50 mph (80 km/h).
X Visit a qualified specialist workshop immediately. Á
Raising Raising
Max.
Max.Speed
Speed
12 mph
12 mph The vehicle is being adjusted to off-road level 3. The display
message informs you of the maximum speed permissible for off-
road level 3.
X
Do not drive at speeds above 12 mph (20 km/h). g
Lowering Lowering
Max.
Max.
Speed 12 mph
Speed 12 mph The vehicle is being lowered from off-road level 3 to off-road level
2. The display message informs you of the maximum speed
permissible for off-road level 3.
X
Do not exceed 12 mph (20 km/h) until the vehicle has reached
off-road level 2. 8
Different. Lock Different. Lock
Sys. Malfunction Sys. Malfunction The differential lock is malfunctioning.
X
Do not drive at speeds above 50 mph (80 km/h).
X Have the vehicle checked at a qualified specialist workshop. 8
Different. Different.
Locking
Locking
Sys. Cooling Down
Sys. Cooling Down
Please Wait Please Wait The differential lock is too hot and has been disengaged.
X
Drive on carefully.
X Allow the differential lock to cool down.
The differential lock reengages as soon as it has cooled down. Display messages
311On-board computer and displays Z

!
Make sure that the electric parking brake
is released. If the electric parking brake is
faulty, visit a qualified specialist workshop.
! Only secure the tow rope or tow bar at the
towing eyes, or the trailer tow hitch, if
available. You could otherwise damage the
vehicle.
! Do not use the towing eye for recovery,
this could damage the vehicle. If in doubt,
recover the vehicle with a crane.
! When towing, pull away slowly and
smoothly. If the tractive power is too high,
the vehicles could be damaged.
! When towing vehicles with KEYLESS-GO,
use the key instead of the Start/Stop
button. Otherwise, the automatic
transmission may shift to position Pwhen
the driver's or front-passenger door are
opened, which could lead to damage to the
transmission.
! Do not tow with sling-type equipment.
This could damage the vehicle.
! Vehicles with differential locks: make
sure the differential locks are in automatic
mode. When towing, the differential locks
must not be switched on. The transmission
may otherwise be damaged.
! The vehicle can be towed a maximum of
30 miles (50km). The towing speed of
30 mph (50 km/h) must not be exceeded.
If the vehicle has to be towed more than
30 miles (50km), the entire vehicle must be
raised and transported.
! If you tow or tow-start another vehicle, its
weight must not exceed the maximum
permissible gross vehicle weight of your
vehicle.
Information on your vehicle's gross vehicle
weight rating can be found on the vehicle
identification plate (Y page 444).
i Information on your vehicle's gross
vehicle weight rating can be found on the vehicle identification plate; see the printed
Operator's Manual.
It is better to have the vehicle transported
than to have it towed.
If the vehicle has suffered transmission
damage, have it transported on a transporter
or trailer.
The automatic transmission must be in
position Nwhen the vehicle is being towed.
The battery must be connected and charged.
Otherwise, you:
R cannot turn the SmartKey to position 2in
the ignition lock
R cannot release the electric parking brake
R cannot shift the automatic transmission to
position N
i Disarm the automatic locking feature
before the vehicle is towed (Y page 284).
You could otherwise be locked out when
pushing or towing the vehicle. Installing/removing the towing eye
Installing the towing eye Example: towing eye mounting covers
:
Front cover
; Back cover 398
Towing and tow-startingBreakdown assistance