traction control MERCEDES-BENZ G-Class 2016 W463 Owner's Manual

1, 2, 3 ...
4ETS (Electronic Traction System)Function/notes ................................ 57
12 V socket ........................................ 223
115 V socket ...................................... 223
A
ABS (Anti-lock Braking System)
Display message ............................ 185
Function/notes ................................ 55
Important safety notes .................... 55
Warning lamp .................................2 06
Accident
Automatic measures after an acci-
dent ................................................. 46
ADAPTIVE BRAKE ................................. 59
Adaptive brake lights .......................... 56
Additives (engine oil) ........................ 292
Adjustable damping .......................... 118
Air bags
Deployment ..................................... 43
Display message ............................ 189
Front air bag (driver, front
passenger) ....................................... 42
Important safety notes .................... 40
Introduction ..................................... 40
PASSENGER AIR BAG OFF indica-
tor lamp ...........................................3 5
Pelvis air bag ................................... 42
Side impact air bag .......................... 42
Window curtain air bag .................... 43
Air vents
Important safety notes .................. 109
Rear ............................................... 110
Setting ...........................................1 09
Setting the center air vents ........... 109
Setting the side air vents ...............1 09
Air-conditioning system
see Climate control
Alarm system
see ATA (Anti-Theft Alarm system)
All-wheel drive
Transfer case ................................. 162
AMG menu (on-board computer) ..... 182
Anti-lock braking system
see ABS (Anti-lock Braking System) Anti-theft alarm system
see ATA (Anti-Theft Alarm system)
Approach/departure angle ..............140
A

shtray ............................................... 221
Assistance menu (on-board com-
puter) ..................................................1 78
ASSYST service interval display
Service messages .......................... 240
ATA (Anti-Theft Alarm system)
Activating/deactivating ................... 59
Function ...........................................5 9
Switching off the alarm .................... 59
Authorized Mercedes-Benz Center
see Qualified specialist workshop
AUTO lights
Display message ............................ 191
see Lights
Automatic car wash .......................... 241
Automatic engine start (ECO start/
stop function) .................................... 116
Automatic engine switch-off (ECO
start/stop function) .......................... 115
Automatic headlamp mode ................ 85
Automatic transmission
Automatic drive program ............... 123
Display message ............................ 201
Drive position (ECO start/stop
function) ........................................ 121
Driving tips .................................... 121
Emergency running mode .............. 127
Engaging drive position .................. 121
Engaging neutral ............................ 120
Engaging reverse gear ................... 120
Engaging the park position ............ 119
Important safety notes .................. 118
Kickdown ....................................... 122
Manual shifting .............................. 124
Neutral (ECO start/stop func-
tion) ............................................... 120
Overview ........................................ 118
Problem (malfunction) ................... 127
Program selector button ................ 122
Pulling away ................................... 113
Selector lever ................................ 119
Shift ranges ................................... 123
Steering wheel paddle shifters ...... 123
Trailer towing ................................. 122
Index3

Drive programAutomati c...................................... 12 3
Displa y.......................................... .119
SETUP (on-board computer) .......... 182
Driving in mountainous terrain
Approach/departure angle ............ 140
Driving downhill .............................1 40
Gradient-climbing capability
(maximum) ..................................... 140
Driving lamps
see Daytime running lamps
Driving off-road
see Off-road driving
Driving on flooded roads .................. 135
Driving safety systems
4ETS (Electronic Traction Sys-
tem) ................................................. 57
ABS (Anti-lock Braking System) ....... 55
ADAPTIVE BRAKE .............................5 9
Adaptive brake lights ....................... 56
BAS (Brake Assist System) .............. 56
Electronic brake force distribu-
tion .................................................. 58
ESP
®(Electronic Stability Pro-
gram) ............................................... 57
Important safety information ........... 55
Overview .......................................... 55
Driving systems
Blind Spot Assist ............................ 154
Cruise control ................................ 141
Display message ............................ 195
DISTRONIC PLUS ...........................147
HOLD function ............................... 157
PARKTRONIC ................................. 158
Rear view camera .......................... 161
SPEEDTRONIC ............................... 145
Variable SPEEDTRONIC ................. 145
Driving tips
Automatic transmission ................. 121
Brakes ...........................................1 33
DISTRONIC PLUS ........................... 153
Downhill gradient ........................... 133
Driving in winter .............................1 36
Driving on flooded roads ................ 135
Driving on sand .............................. 139
Driving over obstacles ................... 139
G

eneral .......................................... 132
Gravel roads .................................. 139 Hydroplaning ................................. 135
Icy road surfaces ........................... 136
Off-road driving .............................. 137
Off-road fording .............................1
35
Snow chains .................................. 264
Tire ruts ......................................... 139
Towing a trailer .............................. 166
Traveling uphill ............................... 140
Wet road surface ........................... 134
DVD audio
Operating (on-board computer) ..... 176
DVD video
Operating (on-board computer) ..... 176
E
EASY-ENTRY featureActivating/deactivating ................. 181
Function/notes ................................ 79
EASY-EXIT feature
Function/notes ................................ 79
Switching on/off ........................... 181
EBD (electronic brake force distri-
bution)
Display message ............................ 186
Function/notes ................................ 58
ECO start/stop function
Deactivating/activating ................. 114
General information ....................... 114
Electrical fuses
Fuse box in the cargo compart-
ment .............................................. 261
Electronic Stability Program
see ESP
®(Electronic Stability Program)
Electronic Traction System
see 4ETS (Electronic Traction System)
Emergency
Automatic measures after an acci-
dent ................................................. 46
Emergency call
see mbrace
Emergency locking
Vehicle ............................................. 66
Emergency release
Vehicle ............................................. 66
Emergency Tensioning Devices
Activation ......................................... 43
Index7

ESP®(Electronic Stability Program)
Important safety notes
iObserve the "Important safety notes" sec-
tion (Ypage 55).
GWARNING
If ESP
®is malfunctioning, ESP®is unable to
stabilize the vehicle. Additionally, further driv-
ing safety systems are deactivated. This
increases the risk of skidding and an accident.
Drive on carefully. Have ESP
®checked at a
qualified specialist workshop.
!Only operate the vehicle for a maximum of
ten seconds on a brake test dynamometer.
Switch off the ignition.
Application of the brakes by ESP
®may oth-
erwise destroy the brake system.
!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.
ESP
®monitors the driving stability and the trac-
tion. Traction is the power transmission
between the tires and the road surface.
ESP
®is deactivated if the åwarning lamp in
the instrument cluster lights up continuously
when the engine is running.
If the ÷ warning lamp and the åwarning
lamp are lit continuously, ESP
®is not available
due to a malfunction.
Observe the information on warning lamps
(
Ypage 207) and display messages which may
be displayed in the instrument cluster
(
Ypage 185).
If ESP®detects that the vehicle is deviating from
the direction desired by the driver, one or more
wheels are braked to stabilize the vehicle. If
necessary, the engine output is also modified to keep the vehicle on the desired course within
physical limits. ESP
®assists the driver when
pulling away on wet or slippery roads. ESP®can
also stabilize the vehicle during braking.
If ESP
®intervenes, the ÷warning lamp
flashes in the instrument cluster. If ESP
®intervenes:
XDo not deactivate ESP®under any circum-
stances.
XOnly depress the accelerator pedal as far as
necessary when pulling away.
XAdapt your driving style to suit the prevailing
road and weather conditions.
iOnly use wheels with the recommended tire
sizes. Only then will ESP®function properly.
iIf differential locks are switched on, ABS,
BAS and ESP®switch off automatically.
4ETS (Electronic Traction System)
Traction control remains active, even if you
deactivate ESP®.
XIf appropriate for the driving conditions,
engage the LOW RANGE off-road gear
(
Ypage 162).
Traction control is part of ESP
®.
Traction control brakes the drive wheels indi-
vidually if they spin. This enables you to pull
away and accelerate on slippery surfaces, for
example if the road surface is slippery on one
side. In addition, more drive torque is transfer-
red to the wheel or wheels with traction.
Traction control remains active, even if you
deactivate ESP
®.
Traction control is no longer active above a
speed of approximately 37 mph (60 km/h).
Traction control brakes the drive wheels indi-
vidually if they spin. This enables you to pull
away and accelerate on slippery surfaces, for
example if the road surface is slippery on one
side. In addition, more drive torque is transfer-
red to the wheel or wheels with traction.
Deactivating/activating ESP®
GWARNING
If you deactivate ESP
®, ESP®no longer sta-
bilizes the vehicle. There is an increased risk
of skidding and an accident.
Only deactivate ESP
®in the situations descri-
bed in the following.
!Avoid spinning the driven wheels for an
extended period with ESP®deactivated. You
could otherwise damage the drivetrain.
Driving safety systems57
Safety
Z

XTo deactivate:press button:until the
å warning lamp lights up in the instrument
cluster.
XTo activate: press button :until the å
warning lamp goes out in the instrument clus-
ter.
ESP
®is activated automatically when the engine
is started.
iVehicles with the ECO start/stop func-
tion: the ECO start/stop function automati-
cally switches the engine off when the vehicle comes to a stop. The engine starts automati-
cally when the driver wants to pull away again.
ESP
®remains in its previously selected sta-
tus. For example, if ESP®was deactivated
before the engine was switched off, ESP®
remains deactivated when the engine is
switched on again.
It may be best to deactivate ESP
®in the follow-
ing situations:
Rwhen using snow chains
Rin deep snow
Ron sand or gravel
If you deactivate ESP®:
RESP®no longer improves driving stability.
Rthe engine's torque is no longer limited and
the drive wheels can spin. The spinning of the wheels results in a cutting action, which pro-
vides better grip.
Rtraction control is still activated.
RESP®still provides support when you brake.
Rand are driving at above 37 mph (60 km/h)
(on AMG vehicles above 62 mph (100 km/h)),
ESP
®still intervenes when one wheel reaches
its grip limit even though it is deactivated.
iIf ESP®is deactivated and one or more
wheels start to spin, the ÷warning lamp in the instrument cluster flashes. In such situa-
tions, ESP
®will not stabilize the vehicle.
iIf ESP®is deactivated, it is reactivated auto-
matically if you are driving at above 37 mph
(60 km/h) (on AMG vehicles above 62 mph
(100 km/h)) or you exceed a certain lateral
acceleration.
Trailer stabilization
GWARNING
If road and weather conditions are poor,
trailer stabilization will not be able to prevent
the vehicle/trailer combination from swerv-
ing. Trailers with a high center of gravity can
tip over before ESP
®can detect this. There is
a risk of an accident.
Always adapt your driving style to the prevail-
ing road and weather conditions.
Trailer stabilization does not work if ESP
®is
deactivated because of a malfunction.
If your vehicle with trailer (vehicle/trailer com-
bination) begins to lurch, you can only stabilize
the vehicle/trailer combination by depressing
the brake firmly.
In this situation, ESP
®assists you and can
detect if the vehicle/trailer combination begins
to lurch. ESP
®slows the vehicle down by brak-
ing and limiting the engine output until the vehi-
cle/trailer combination has stabilized.
Trailer stabilization is active above speeds of
about 37 mph (60 km/h).
EBD (electronic brake force distribu-
tion)
i
Observe the "Important safety notes" sec-
tion (Ypage 55).
GWARNING
If EBD is malfunctioning, the rear wheels can
lock, e.g. under full braking. This increases the
risk of skidding and an accident.
You should therefore adapt your driving style
to the different handling characteristics. Have
the brake system checked at a qualified spe-
cialist workshop.
58Driving safety systems
Safety

affect your reflexes, perceptions and judg-
ment.
The possibility of a serious or even fatal acci-dent are greatly increased when you drink or
take drugs and drive.
Do not drink or take drugs and drive or allow
anyone to drive who has been drinking or tak-
ing drugs.
Pedals
GWARNING
Objects in the driver's footwell can restrict the pedal travel or obstruct a depressed pedal.
The operating and road safety of the vehicle is
jeopardized. There is a risk of an accident.
Make sure that all objects in the vehicle are
stowed correctly, and that they cannot enter
the driver's footwell. Install the floormats
securely and as specified in order to ensure
sufficient clearance for the pedals. Do not use
loose floormats and do not place floormats on
top of one another.
Emission control
GWARNING
Inhalation of exhaust gas is hazardous to your
health. All exhaust gas contains carbon mon-
oxide (CO), and inhaling it can cause uncon-
sciousness and possible death.
Do not run the engine in confined areas (such as a garage) which are not properly ventilated.
If you think that exhaust gas fumes are enter-
ing the vehicle while driving, have the cause
determined and corrected immediately. If you
must drive under these conditions, drive only
with at least one window fully open at all
times.
Certain engine systems are designed to keep
the level of poisonous components in exhaust
fumes within legal limits.
These systems only work at peak efficiency if
they are serviced exactly in accordance with the
manufacturer's specifications. For this reason,
all work on the engine should only be carried out by qualified and authorized Mercedes-Benz
technicians.
The engine settings must not be changed under
any circumstances. Furthermore, all specific
service work must be carried out at regular
intervals and in accordance with the Mercedes-
Benz service requirements. Details can be found
in the Maintenance Booklet.
Braking
Important safety notes
GWARNING
If you activate the LOW off-road gear while
driving on a slippery road surface, the wheels
may lose traction:
Rif you remove your foot from the accelera-
tor pedal when driving
Rif off road ABS intervenes when braking
If the wheels lose traction. the vehicle can no
longer be steered. There is an increased dan- ger of skidding and accidents.
Never activate the LOW off-road gear while
driving on a slippery road surface.
Downhill gradients
!On long and steep gradients, you must
reduce the load on the brakes by shifting early
to a lower gear. This allows you to take
advantage of the engine braking effect and
helps avoid overheating and excessive wear
of the brakes.
When you take advantage of the engine brak-
ing effect, a drive wheel may not turn for some
time, e.g. on a slippery road surface. This
could cause damage to the drive train. This
type of damage is not covered by the
Mercedes-Benz warranty.
Heavy and light loads
GWARNING
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.
Driving tips133
Driving and parking
Z

GWARNING
If you activate the LOW off-road gear while
driving on a slippery road surface, the wheels
may lose traction:
Rif you remove your foot from the accelera-
tor pedal when driving
Rif off road ABS intervenes when braking
If the wheels lose traction. the vehicle can no
longer be steered. There is an increased dan- ger of skidding and accidents.
Never activate the LOW off-road gear while
driving on a slippery road surface.
Drive particularly carefully on slippery road sur-
faces. Avoid sudden acceleration, steering and
braking maneuvers. Do not use cruise control.
If the vehicle threatens to skid or cannot be
stopped when moving at low speed:
XShift the transmission to position N.
XTry to bring the vehicle under control using
corrective steering.
The outside temperature indicator is not
designed to serve as an ice-warning device and
is therefore unsuitable for that purpose.
Changes in the outside temperature are dis-
played after a short delay.
Indicated temperatures just above the freezing
point do not guarantee that the road surface is
free of ice. The road may still be icy, especially in
wooded areas or on bridges. You should pay
special attention to road conditions when tem-
peratures are around the freezing point.
For more information on driving with snow
chains, see (
Ypage 264).
Off-road driving
Important safety notes
GWARNING
Do not load items on the basic carrier bars. It
may cause instability during some maneuvers
which could result in an accident.
Drive slowly in unknown terrain. This will
make it easier to recognize unexpected obsta-
cles and avoid damage to the vehicle.
To help avoid the vehicle rolling over, never
turn it around on steep inclines. If the vehicle cannot complete the attempted climb, back it
down in reverse gear.
Do not drive along the side of a slope. The
vehicle might otherwise rollover. If in doing so
the vehicle begins to show a tendency to roll,immediately steer into a line of gravity
(straight up or downhill).
Never let the vehicle roll backwards in idle.
You may lose control of the vehicle if you use
only the service brake. For information on
driving downhill, see "Driving downhill".
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 charac-
teristics 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 dam-
age to the vehicle, which, in turn, can lead to
failure of the mechanical assembly or systems.
Adapt your driving style to suit the terrain con-
ditions. Drive carefully. Have damage to the
vehicle rectified immediately at a qualified spe-
cialist workshop.
General notes
HEnvironmental note
Protection of the environment is of primary
importance. Treat nature with respect.
Observe all prohibiting signs.
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.
Driving tips137
Driving and parking
Z

the vehicle is facing in the direction of the line
of fall.
RObserve the notes on driving in mountainous
terrain (Ypage 140).
RDrive slowly.
RDo not drive at an angle down steep inclines.
Steer into the line of fall and drive with the
front wheels aligned straight. Otherwise, the
vehicle could slip sideways, tip and roll over.
RCheck that the brakes are working normally
after a long downhill stretch.
iThe special off-road ABS setting (Ypage 56)
enables repeated, brief, precise locking of the
front wheels, which leads to the wheels dig-
ging into the loose ground. Note that when
the front wheels are fully braked, they slide
easily over the surface of the ground, making
it difficult to steer.
Driving systems
Cruise control
Important safety notes
GWARNING
The brake pedal moves when cruise control
brakes the vehicle. A foot in the area under
the brake pedal could become trapped. The
movement of the pedal, and therefore the
vehicle's ability to brake, may be restricted by objects in the area under the brake. There is a
risk of an accident and injury.
Do not place your foot under the brake pedal. Keep the area under the brake pedal free from
obstructions.
If you fail to adapt your driving style, cruise con-
trol can neither reduce the risk of accident nor
override the laws of physics. Cruise control can-
not take account of road, weather and traffic
conditions. Cruise control is only an aid. You are
responsible for the distance to the vehicle in
front, for vehicle speed and for braking in good
time. Adjust your driving style to the traffic con-
ditions. Only engage cruise control when the
current road, weather and traffic conditions per-
mit it to be done safely. Drive carefully and
maintain a suitable distance to the vehicle in
front. Do not use cruise control:
Rin traffic conditions that do not allow you to
drive at a constant speed, e.g. heavy traffic,
on winding roads or off-road
Ron slippery road surfaces. Braking or accel-
erating could cause the drive wheels to lose
traction and the vehicle could then skid
Rwhen there is poor visibility, e.g. due to fog,
heavy rain or snow
General notes
Cruise control maintains a constant road speed
for you. On long and steep downhill gradients,
especially if the vehicle is laden, you must select
shift range
1,2 or 3in good time. By doing so,
you will make use of the braking effect of the
engine. This relieves the load on the brake sys-
tem and prevents the brakes from overheating
and wearing too quickly.
Use cruise control only if road and traffic con-
ditions make it appropriate to maintain a steady
speed for a prolonged period. You can store any
road speed above 20 mph (30 km/h).
iCruise control should not be activated when
driving off-road.
Cruise control lever
:To activate or increase speed
;LIM indicator lamp
=To activate at the current speed/last stored speed
?To activate or reduce speed
ATo switch between cruise control and varia-
ble SPEEDTRONIC
BTo deactivate cruise control
You can operate cruise control and variable
SPEEDTRONIC with the cruise control lever.
Driving system s141
Driving an d parking
Z

is interrupted. As a result, the vehicle could
roll away. There is a risk of an accident.
Secure the vehicle with the parking brake, and
on uphill or downhill gradients, also secure it
with a device such as a wheel chock.
XTurn the SmartKey to position2in the ignition
lock (Ypage 112).
XApply the parking brake.
XDepress the brake pedal.
XMove the selector lever to position N
(Ypage 119).
XPress and hold LOW RANGE button ;for
approximately ten seconds.
When the shift procedure is complete, the TC
In Neutralmessage appears in the multi-
function display for five seconds.
If the gear change is not completed, the follow-
ing messages could appear in the display
(
Ypage 195).
iIf the transfer case is in neutral, the key is in
the ignition lock and you open the driver's
door, the TC
InNeutralmessage appears in
the multifunction display. If you then release
the parking brake, a warning tone will sound.
Differential locks
General notes
GWARNING
When the differential locks are engaged, ABS, 4ETS, ESP
®and BAS are deactivated. As a
result, the wheels could lock when braking
and the braking distance is increased. There is
a risk of an accident.
Disengage the differential locks immediately
on firm surfaces with good grip.
!In order to avoid damage to the transfer
case, you must operate the vehicle on a dyna-
mometer (1-axle dynamometer) only if:
Rthe axle not driven on is jacked up
or
Rthe corresponding propeller shaft is dis-
connected and the transfer case differen-
tial lock is engaged.
Otherwise, the transfer case can be damaged. Differential locks improve the traction of the
vehicle.
Your vehicle is equipped with a differential lock
each for:
Rthe transfer case: this controls the balance
between the front and rear axles.
Rthe rear axle: this controls the balance
between the wheels on the rear axle.
Rthe front axle: this controls the balance
between the wheels on the front axle.
Information on differential gear system
and differential lock
When the vehicle drives around a curve, the
wheels on the outside of the curve must cover a
greater distance. Therefore, the wheels turn
more rapidly than on the inside. The differential,
a gear system in the drive train, allows for dif-
fering rotational speeds and facilitates corner-
ing.
The disadvantage of a differential is that the
wheels that have the least grip, get the most
drive. An example: a wheel of a driven axle is on
a snow-covered surface and therefore does not
have any traction. The differential sends most of
the drive force to this wheel because the force
takes the route of the lowest resistance. The
opposite wheel on this axle, however, which
stands on firm ground and could therefore allow
propulsion, receives no driving power. 4ETS
compensates for this disadvantage. 4ETS pro-
vides good steerability by automatically braking
the spinning wheel. 4ETS provides the wheel on
the firm surface with more drive force, which in
turn provides propulsion.
ESP
®and 4ETS are traction systems that are
ideal for road driving and suitable for light off-
road driving. The LOW RANGEoff-road gear
also improves off-road capability.
More challenging off-road conditions require
additional measures such as locking one or
more differential. Your vehicle is equipped with
three differential locks:
Ra central differential lock for the transfer case
Ra differential lock for the front axle and
Ra differential lock for the rear axle
Each differential lock can be engaged with the
corresponding switch on the center console. If
the differential in the transfer case is locked, the
front and rear wheels rotate at the same speed.
If t

he differential for the rear axle is locked, both
164Off-road driving systems
Driving and parking

The vehicle's ability to steer is severely restric-
ted. Drive carefully and accelerate gently for
optimum traction.
iYou can now engage the differential lock for
rear axle ?and the differential lock for front
axle ;as required.
Differential lock for the rear axle
XTo engage: press switch ?.
Yellow activation indicator lamp Alights up
first, followed by red function indicator
lamp :of switch ?.
The differential lock for the rear axle is
engaged.
Differential lock for the front axle
XTo engage: press switch ;.
First, the yellow activation indicator lamp
lights up, followed by the red function indica-
tor lamp.
The differential lock for the front axle is
engaged.
Disengaging the differential locks
You can disengage the differential locks in the
following order: ;,?,=.
XTo simultaneously disengage all differen-
tial locks: press switch =.
Yellow activation indicator lamps Aand red
function indicator lamps :go out.
After approximately three seconds of normal
driving, ABS, 4ETS, ESP
®and BAS are activa-
ted.
The ABS not available differential
lockedmessage disappears in the multifunc-
tion display and the å,!and÷
warning lamps in the instrument cluster go
out.
XShift the transfer case to the HIGH RANGE
on-road position (Ypage 162).
iIf red function indicator lamps :do not go
out when disengaging the differential locks,
stop the vehicle safely as soon as possible, in
accordance with the traffic conditions. Then,
continue driving and the load change can
release the differential lock.
Towing a trailer
Notes on towing a trailer
Important safety notes
GWARNING
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.
GWARNING
When the vehicle/trailer combination begins
to lurch, you could lose control of it. The vehi- cle/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.
GWARNING
If you install a ball coupling other than the one
delivered with the vehicle, the trailer tow hitch
and the rear axle may be overloaded. This
applies especially if the ball coupling in ques-
tion 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.
Only install the ball coupling delivered with
the vehicle or a ball coupling that is designed
to meet your trailer towing requirements. Do
not modify the ball coupling or the trailer tow
hitch.
GWARNING
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.
166Towing a trailer
Driving and parking

Display messagesPossible causes/consequences andMSolutions
Check TiresThe tire pressurein on eor mor etires has dropped significantly. The
whee lposition is displayed in th emultifunction display.
A warning tone also sounds.
GWARNIN G
Wit htire pressures whic hare to olow, there is aris kof th efollowin g
hazards :
Rthey may burst, especially as th eload and vehicl espeed increase.
Rthey may wear excessivel yand/o runevenly, whic hmay greatl y
impair tire traction .
Rthedrivin gcharacteristics ,as well as steering and braking ,may be
greatl yimpaired.
There is aris kof an accident.
XStop th evehicl ewithout making any sudden steering or braking
maneuvers .Pay attention to th etraffic condition sas you do so.
XSecur eth evehicl eagainst rollin gaway (Ypage 130).
XIf there is aflat tire, inspec tth etires (Ypage 250).
XChec kth etire pressur e (Ypage 268).
XIf necessary, correc tth etire pressure.
Warnin gTir eMal ‐functionThe tire pressur ein on eor mor etires has dropped suddenly. The whee l
position is shown in th emultifunction display.
A warning tone also sounds.
GWARNIN G
If you drive wit h aflat tire, there is aris kof th efollowin ghazards :
Raflat tire affects th eabilit yto steer or brak eth evehicle.
Ryou could lose control of th evehicle.
Rcontinued drivin gwit h a flat tire will caus eexcessive heat build-up
and possibl y afire.
There is aris kof an accident.
XStop th evehicl ewithout making any sudden steering or braking
maneuvers .Pay attention to th etraffic condition sas you do so.
XSecur eth evehicl eagainst rollin gaway (Ypage 130).
XIf there is aflat tire, inspec tth etires (Ypage 250).
Correc tTir ePres‐sur eThe tire pressur eis to olow in at least on eof th etires ,or th etire
pressur edifference between th ewheels is to ogreat.
XChec kth etire pressures at th enext opportunity (Ypage 268).
XIf necessary, correc tth etire pressure.
XRestart th etire pressur emonitor (Ypage 270).
TirePress .Sen ‐sor(s) Missin gThere is no signal from th etire pressur esensor of on eor several
wheels. The pressur eof th eaffecte dtire is no tdisplayed in th emul-
tifunction display.
XHav eth efault ytire pressur esensor replace dat aqualified special -
ist workshop .
Display messages199
On-board computer and displays
Z