length MERCEDES-BENZ GLS 2018 Owners Manual

Applying or releasing ma nuallyX
To engage: push handle C .
When th e electric parking brak e is engaged,
th e I (US A only) or $ (Canada only)
red indicator lamp lights up in th e instrumen t
cluster.
i The electric parking brak e can also be
applie d when th e SmartKey is removed.X
To release: pull handle C .
The red I (US A only) or $ (Canada
only) indicator lamp in th e instrumen t cluste r
goe s out .
i The electric parking brak e can only be
released: R
when th e SmartKey is in position G in th e
ignition loc k ( Y
page 140) orR
if th e ignition was switched on usin g th e
Start/Sto p butto n
To ensur e that you do no t rol l backwards when
pullin g away on an uphil l slope, engage th e elec -
tric parking brak e ( Y
page 143).
Applying automatically The electric parking brak e is automatically
applie d when th e transmission is in position ]
and R
th e engin e is switched off orR
th e driver is no t wearing a seat belt and th e
driver's door is opened
To preven t th e electric parking brak e from bein g
automatically applied, pull handle C . The electric parking brak e is also engage d auto -
matically if: R
Distanc e Pilo t DISTRONI C bring s th e vehicl e
to a standstill or R
th e HOLD function is keepin g th e vehicl e sta-
tionary R
Parking Pilo t is keepin g th e vehicl e stationary
In addition , at least on e of th e followin g condi-
tion s mus t be fulfilled :R
th e engin e is switched off R
th e driver is no t wearing a seat belt and th e
driver's door is opened R
there is a system malfunction R
th e powe r supply is insufficien tR
th e vehicl e is stationary for a lengthy period
The red I (US A only) or $ (Canada only)
indicator lamp in th e instrumen t cluste r lights
up.
The electric parking brak e is no t automatically
engage d if th e engin e is switched off by th e ECO
start/sto p function .
Releasing automatically The electric parking brak e is release d automat -
ically when all of th e followin g condition s are
fulfilled : R
The engin e is running. R
The seat belt tongue is engage d in th e belt
buckle. R
The transmission is in position [ or ^ and
you depress th e accelerato r pedal or, on a
level surface, shif t from transmission position
] to [ or ^ . R
If th e transmission is in position ^ , th e trunk
lid mus t be closed.
If th e seat belt tongue is no t engage d in th e seat
belt buckle, th e followin g condition s mus t be
fulfilled : R
The driver's door is closed. R
You are shifting from transmission position
] or hav e previously driven at speeds
greate r than 2 mph (3 km/h). R
If th e transmission is in position ^ , th e trunk
lid mus t be closed.
When th e electric parking brak e is released,
th e $ indicator lamp goes out in th e instru-
men t cluster. Parking 163
Driving and parking Z

The attention level evaluation is deleted and
restarts when the journey is continued, if: R
you switch off the engine R
you take off your seat belt and open the driv-
er's door, e.g. for a change of drivers or to
take a break
Displaying the attention level
You can have current status information dis-
played in the assistance menu ( Y
page 241) of
the on-board computer. X
Select the Assistance display for ATTENTION
ASSIST using the on-board computer
( Y
page 241).
The following information is displayed: R
the length of the journey since the last break. R
the attention level determined by ATTENTION
ASSIST, displayed in a bar display in five levels
from high to low. R
If ATTENTION ASSIST is unable to calculate
the attention level and cannot output a warn-
ing, the System suspended message
appears. The bar display then changes the
display, e.g. if you are driving at a speed below
37 mph (60 km/h) or above 125 mph
(200 km/ h) .
Activating ATTENTION ASSIST X
Activat e ATTENTION ASSIST usin g th e on -
boar d computer ( Y
page 242).
The system determine s th e attention level of
th e driver depending on th e setting selected:
Standar d selected: th e sensitivit y wit h whic h
th e system determine s th e attention level is set
to normal.
Sensitive selected: th e sensitivit y is set higher.
The attention level detecte d by Attention Assis t is adapted accordingly and th e driver is warned
earlier .
When ATTENTION ASSIST is deactivated, th e

Most U.S. states and all Canadian provinces
require by law: R
Safety chains between the towing vehicle and
the trailer. The chains should be cross-wound
under the trailer drawbar. They must be fas-
tened to the vehicle's trailer coupling, not to
the bumper or the axle.
Leave enough play in the chains to make tight
cornering possible. R
A separate brake system for certain types of
trailer. R
Safety switch for braked trailers. Check the
specific legal requirements applicable to your
state.
If the trailer becomes detached from the tow-
ing vehicle, the safety feature triggers the
trailer brakes.
Towing a trailer There are numerous legal requirements con-
cerning the towing of a trailer, e.g. speed restric-
tions. Make sure that your car/trailer combina-
tion complies with the local regulations: R
in your place of residence R
in the location to which you are driving
The police and local authorities can provide reli-
able information.
Observe the following when towing a trailer: R
To gain driving experience and to become
accustomed to the new handling characteris-
tics, you should practice the following in a
traffic-free location: -
cornering -
stopping -
backing up R
Before driving, check: -
trailer tow hitch -
safety switch for braked trailers -
safety chains -
electrical connections -
lights -
wheels R
Adjust the exterior mirrors to provide an
unobstructed view of the rear section of the
trailer. R
If the trailer has electronically controlled
brakes, pull away carefully. Brake manually using the brake controller and check whether
the brakes function correctly. R
Secure any objects on the trailer to prevent
the cargo from slipping when the vehicle is in
motion. R
When you couple up a trailer, check at regular
intervals that the load is firmly secured. If the
trailer is equipped with trailer lights and
brakes, check the trailer to ensure that these
are working. R
Bear in mind that the handling will be less
stable when towing a trailer than when driving
without one. Avoid sudden steering move-
ments. R
The vehicle/trailer combination is heavier,
accelerates more slowly, has a decreased
gradient climbing capability and a longer
braking distance.
It is more susceptible to side winds and
requires more careful steering. R
If possible, do not brake suddenly, but instead
depress the brake pedal moderately at first so
that the trailer can activate its brakes. Then
increase the pressure on the brake pedal. R
If the automatic transmission repeatedly
shifts between gears on uphill or downhill gra-
dients, shift to a lower gear using the left-hand
steering wheel paddle shifter.
A lower gear and lower speed reduce the risk
of engine failure. R
When driving downhill, shift to a lower gear to
utilize the engine's braking effect.
Avoid continuous brake application as this
may overheat the vehicle brakes and, if instal-
led, the trailer brakes. R
If the coolant temperature increases dramat-
ically while the air-condition ing system is
switched on, switch off the air-conditioning
system.
Coolant heat can also be dissipated by open-
ing the windows and switching the ventilation
blower and the interior temperature to the
highest level. R
When overtaking, pay particular attention to
the extended length of your vehicle/trailer
combination.
Due to the length of the vehicle/trailer com-
bination, you require additional road space in
relation to the vehicle you are overtaking
before you can change back to the original
lane.228
Towing a trailer
Driving and parking

the household rubbish. They
must be collected separately
and recycled to protect the
environment.
Dispose of batteries in an
environmentally friendly
manner. Take discharged
batteries to a qualified spe-
cialist workshop or a special
collection point for used bat-
teries.
! Have the battery regularly checked at a
qualified specialist workshop.
For more information, please contact a quali-
fied specialist workshop.
! Always have work on batteries carried out at
a qualified specialist workshop.
Should it, in exceptional circumstances, be
absolutely necessary to disconnect the 12-
volt battery yourself, please observe the fol-
lowing: R
Secure the vehicle to prevent it from rolling
away. R
Switch off the ignition. R
Disconnect the negative terminal first and
then the positive terminal.
The transmission is locked in position ]
after disconnecting the battery.
After the work has been done, install the bat-
tery and replace the cover of the positive ter-
minal clamp firmly.
Comply with safety precautions and take pro-
tective measures when handling batteries.
Risk of explosion.
Fire, open flames and smoking are
prohibited when handling the bat-
tery. Avoid creating sparks.
Battery acid is caustic. Avoid contact
with skin, eyes or clothing.
Wear suitable protective clothing,
especially gloves, apron and face-
guard. Rinse any acid spills immediately
with clear water. Contact a physician
if necessary.
Wear eye protection.
Keep children away.
Observe this Operator's Manual.
For safety reasons, Mercedes-Benz recom-
mends that you only use batteries which have
been tested and approved for your vehicle by
Mercedes-Benz. These batteries provide
increased impact protection to prevent vehicle
occupants from suffering acid burns should the
battery be damaged in the event of an accident.
In order for the battery to achieve the maximum
possible service life, it must always be suffi-
ciently charged.
Like other batteries, the vehicle battery may
discharge over time if you do not use the vehicle.
In this case, have the battery disconnected at a
qualified specialist workshop. However, you can
also charge the battery with a charger recom-
mended by Mercedes-Benz. Contact a qualified
specialist workshop for further information.
Have the battery condition of charge checked
more frequently if you use the vehicle mainly for
short trips or if you leave it standing idle for a
lengthy period. Consult a qualified specialist
workshop if you wish to leave your vehicle
parked for a long period of time.
Remove the SmartKey if you park the vehicle
and do not require any electrica l consumers.
T he vehicle will then use very little energy, thus
conserving battery power.
If the power supply has been interrupted, e.g. if
you reconnect the battery, you will have to: R
set the clock; see the Digital Operator's Man-
ual
On vehicles with a multimedia system and
navigation system, the clock is set automati-
cally. R
reset the function for folding the exterior mir-
rors in/out automatically, by folding the mir-
rors out once ( Y
page 111)Battery (vehicle) 345
Breakdown assistance Z

Particularly avoid fire, open flames, creating sparks and smoking. Ensure there is sufficient ven-
tilation while charging and jump-starting. Do not lean over a battery.
G WARNING
During the charging process, a battery produces hydrogen gas. If a short circuit occurs or sparks
are created, the hydrogen gas can ignite. There is a risk of an explosion. R
Make sure that the positive terminal of a connected battery does not come into contact with
vehicle parts. R
Never place metal objects or tools on a battery. R
It is important that you observe the described order of the battery terminals when connecting
and disconnecting a battery. R
When jump-starting, make sure that the battery poles with identical polarity are connected. R
It is particularly important to observe the described order when connecting and disconnecting
the jumper cables. R
Never connect or disconnect the battery terminals while the engine is running.
G WARNING
A discharged battery can freeze at temperatures below freezing point. When jump-starting the
vehicle or charging the battery, gases can escape from the battery. There is a risk of an explosion.
Allow the frozen battery to thaw out before charging it or jump-starting.
! Vehicles with a gasoline engine: avoid repeated and lengthy starting attempts. Otherwise, the
catalytic converter could be damaged by non-combusted fuel.
If the indicator/warning lamps do not light up at low temperatures, it is very likely that the dis-
charged battery has frozen. In this case you may neither jump-start the vehicle nor charge the
battery. The service life of a thawed-out battery may be shorter. The starting characteristics can be
impaired, particularly at low temperatures. Have the thawed-out battery checked at a qualified
specialist workshop.
Do not start the vehicle using a rapid charging device. If your vehicle's battery is discharged, the
engine can be jump-started from another vehicle or from a donor battery using jumper cables.
Observe the following points: R
The battery is not accessible in all vehicles. If the other vehicle's battery is not accessible, jump-
start the vehicle using a donor battery or a jump-starting device. R
Vehicles with a gasoline engine: only jump-start the vehicle when the engine and exhaust
system are cold. R
Do not start the engine if the battery is frozen. Let the battery thaw first. R
Only jump-start from batteries with a 12 V voltage rating. R
Only use jumper cables which have a sufficient cross-section and insulated terminal clamps. R
If the battery is fully discharged, leave the battery that is being used to jump-start connected for
a few minutes before attempting to start. This charges the battery slightly. R
Make sure that the two vehicles do not touch. Jump-starting 347
Breakdown assistance Z

All other mod -
els with: C
Opening
height D
Max.
headr oom
AIRMATIC
package 83.9 in -
86.9 in
(2132 mm -
2207 mm ) 76.1 in -
79.1 in
(1934 mm -
2009 mm )
ON&O FFROAD
package 83.9 in -
88.1 in
(2132 mm -
2237 mm ) 76.1 in -
80.3 in
(1934 mm -
2039 mm )
Merc edes ‑ AMG vehicles
Vehicle length
203.2 in
(5162 mm)
Vehicle width including
exterior mirrors
Vehicle width without exte-
rior mirrors 78.0 in
1982 mm
Vehicle height
72.9 in
1850 mm
Wheelbase
121.1 in
3075 mm
Maximum ground clear-
ance
Minimum ground clear-
ance 7.8 in
(198 mm)
Turning radius
40.7 ft
(12.40 m)
Maximum roof load
220 lbs
(100 kg)
All other models
Vehicle length
202.0 in
(5130 mm)
Vehicle width including
exterior mirrors 84.3 in
(2141 mm)
Maximum vehicle height
(AIRMATIC package) 75.2 in
(1910 mm) All other models
Maximum vehicle height
(ON&OFFROAD package) 76.4 in
(1940 mm)
Minimum vehicle height
72.8 in
(1850 mm)
Wheelbase
121.1 in
(3075 mm)
Maximum ground clear-
ance (AIRMATIC package) 10.9 in
( 276 mm)
Maximum ground clear-
ance (ON&OFFROAD pack-
age) 12.0 in
(306 mm)
Minimum ground clear-
ance 7.9 in
(201 mm)
Turning radius
40.7 ft
(12.40 m)
Maximum roof load
220 lb
(100 kg)
Vehicle data for off-road driving
Fording depth
! The depth of water must not exceed the
value specified in the table. Note that the
possible fording depth is less in flowing water.
C
Fording depth
On vehicles with the AIRMATIC package or the
Off-Road Engineering package, loads up to the
maximum permissible load have no influence on
fording capability.
Missing values were not available at the time of
going to print.Vehicle data for off-road driving 393
Technical data Z