2019 MERCEDES-BENZ GLS SUV air condition

R
For saf etyre asons, on lyuse sn ow chainsthat
ha ve been specifically appr oved foryo ur
ve hicle byMercedes-Benz, or snow chains
with the same quality standard.
R If sn ow ch ains are fitted, the maximum per‐
missible speed is 50 km/h.
R Vehicles with Active Parking Assis t:do
not use Active Parking Assist when snow
ch ains are fitted.
R Vehicles with AIRMATIC or E- ACTIVE
BO DY CONT ROL:if snow chains are fitted,
only drive at raised vehicle le vel .
% You can permanently limit the maximum
ve hicle speed for driving with winter tyres
(/ page 245).
% You can deactivate ESP ®
to pull away
( / page 234). This allo wsthe wheels to
spin, achieving an increased driving forc e. Ty
re pressure Note
s on tyre pressure &
WARNING Risk of accident due toinsuf‐
fi cient or excessive tyre pressure
Underinfla ted or overinfla ted tyres pose the
fo llowing risks:
R The tyres may bur st, especially as the
load and vehicle speed increase.
R The tyres may wearexc essively and/or
une venly, which may greatlyimpair tyre
traction.
R The driving characteristics, as well as
st eering and braking, may be greatly
impaired. #
Comply with there commended tyre
pressure and check the tyre pressure of
all tyres including the spare wheel regu‐
larly:
R at least once a month
R when the load changes R
before embarking on a lon ger journey
R if operating conditions change, e.g. off-
ro ad driving #
Adjust the tyre pressure as necessar y. Ty
re pressure which is too high or too low can:
R Shor tenth e service life of the tyres.
R Cause increased tyre damage.
R Adversely af fect driving characteristics and
th us driving saf ety, e.g. due toaquaplaning. &
WARNING Risk of accident from repea‐
te d tyre pressure drop
If th e tyre pressure drops repeatedly, the
wheel, valve or tyre may be damaged.
Insuf ficient tyre pressure can cause the tyres
to bur st. #
Inspect the tyre for signs of fore ign
objects. #
Check whe ther the wheel or valve has a
leak. Wheels and tyres
571

Angle of approach/depa
rture All models (vehi‐
cles without
AMG
Styling) 1 1
Front 2 2Rear
Ve hicles with
AIRMATIC*
Normal le vel2 3° 20°
Ra ised le vel2 7°24 °
Ve hicles with
Off-road pac kage
Normal le vel2 3° 20°
Off-road le vel12 5° 22°
Off-road le vel22 7° 24 °
Off-road le vel32 9° 26° All models (vehi‐
cles with
AMG
Styl ing) 1 1
Front 2 2Rear
Ve hicles with
AIRMATIC
Normal le vel2 1° - 22° 20° - 21 °
Ra ised le vel2 5° - 26° 24° - 25°
Ve hicles with
Off-road pac kage
Normal le vel2 1° - 22° 20° - 21 °
Off-road le vel12 3° -24°2 2° - 23°
Off-road le vel22 5° - 26° 24° - 25°
Off-road le vel32 7° - 28° 25° - 26° *Depending on
the tyre size
Maximum gradient climbing ability
The vehicle's gradient climbing ability depends
on thewe ight distribution in theve hicle, thete r‐
ra in conditions and thero ad sur face conditions. The specified
value applies when:
R theve hicle is ready todrive – fuel tank full,
all fluids topped up, with driver
R theLO W RANGE off-roadgear of the trans‐
fe r case is engaged
R thero ad sur faces conditions and thus the
traction are good
A gradient climbing ability of 100% cor responds
to an incline of 45°.
Obse rveth e no tes on driving in mountainous ter‐
ra in . Model
Maximumgra‐
dient climbing ability
Ve hicles without Off-
ro ad pac kage 80%
Ve hicles with Off-road
pac kage
When LOW RANGE off-
ro ad gear is engaged 10
0% 608
Tech nical da ta

Display messages
Possible causes/consequences and M
MSolutions
If it is still not possible torelease the electric parking brake: #
Do not continue driving under any circums tances. Consult a qualified specialist workshop.
J
Check brake fluid level *T
here is insuf ficient brake fluid in the brake fluid reser voir. &
WARNING Risk of an accident due tolow brake fluid le vel
If th e brake fluid le vel is too lo w,the braking ef fect and the braking characteristics may be impaired. #
Stop theve hicle as soon as possible, paying attention toroad and traf fic conditions. Do not continue driv‐
ing. #
Consult a qualified specialist workshop. #
Do not top up the brake fluid. #
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions. Do not
continue driving under any circums tances. #
Do not top up the brake fluid. #
Consult a qualified specialist workshop.
Check brake pads See
Owner's Manual *T
he brake pads ha vereached thewe ar limit. &
WARNING Risk of accident due torestricted braking po wer
When the brake pads ha vereached their wear limit, the braking po wer may be restricted. Display messages and
warning/indicator lamps 619

Display messages
Possible causes/consequences and M
MSolutions &
WARNING ‑ Risk of inju ryor eve nfa ta l injury when the front passenger airbag is disabled
If th e front passenger airbag is disabled, It will not be deplo yed in theeve nt of an accident and cannot pe rform
its intended pr otective function.
A person in the front passenger seat could then, forex ample, come into con tact wi th theve hicle interior, espe‐
cially if the person is sitting too close tothe dashboard. #
Beaware of thest atus of the front passenger airbag bo thbefore and during the journe y. #
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions. #
Check thest atus of the automatic front passenger airbag shutoff (/ page47). #
If necessar y,consult a qualified specialist workshop immediatel y.
Front-passenger airbag
enabled See Owner's Man-
ual *T
he front passenger airbag is enabled while theve hicle is in motion:
R even when a child, a small adult or an object weighing less than the sy stem weight thre shold is located on the
front passenger seat
R even when the front passenger seat is not occupied
The sy stem may de tect objects or forc es that are adding tothewe ight applied tothe seat. 622
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and M
MSolutions &
WARNING Risk of inju ryor fata l injury when using a child restra int sy stem while the front passenger airbag
is enabled
If yo u secure a child in a child restra int sy stem on the front passenger seat and the front passenger airbag is
enabled, the front passenger airbag can deploy in theeve nt of an accident.
The child could be stru ck bythe airbag. #
Ensure, bo thbefore and during the journe y,that thest atus of the front passenger airbag is cor rect.
NEVER use a rear wa rdfacing child restra int on a seat pr otected byan ACTIVE FRONT AIRB AGin front of it;
DE ATH or SERIOUS INJU RYtotheCH ILD can occur. #
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions. #
Check thest atus of the automatic front passenger airbag shutoff (/ page47). #
If necessar y,consult a qualified specialist workshop immediatel y.
Active Brake Assist Func-
tions currently limited See
Owner's Manual *
Ve hicles with the Driving Assistance Package: Active Brake Assi stwith cross-traf fic function, Evasi veSteering
Assist or PRE‑SAFE ®
PLUS are temp orarily una vailable or only partially available.
Ve hicles without the Driving Assistance pa ckage: Active Brake Assi stistemp orarily una vailable.
The ambient conditions are outside the sy stem limits (/ page 235). #
Drive on.
As soon as the ambient conditions are within the sy stem limits, the sy stem will become available again. Display messages and
warning/indicator lamps 623

Engine
Display messages
Possible causes/consequences and M
MSolutions
Top up coolant See Own-
er’s Manual *T
he coolant le vel is too lo w.
* NO
TEEngine dama gedue toinsuf ficient coolant #
Avoid long journe yswith insuf ficient coolant. #
Add coolant (/ page 536).
?
Coolant Stop vehicle
Switch engine off *T
he coolant is too hot. #
Stop theve hicle immediately, paying attention toroad and traf fic conditions, and switch off the engine. &
WARNING Danger of bu rns when opening the bonn et
If yo u open the engine bonn etwhen the engine has overheated or during a fire inthe engine compartment, you
could come into contact wi thhot gases or other escaping operating fluids. #
Before opening the bonn et, allow the engine tocool down. #
Intheeve nt of a fire inthe engine compartment, keep the engine bonn etclosed and call thefire service. #
Wait until the engine has cooled down. #
Make sure that the air supply tothera diator is not obstructed. #
Avoiding high loads on the engine, drive tothe nearest qualified specialist workshop. In doing so, ensure that
th e coolant temp erature display remains below 120 °C. Displ
aymessa ges and warning/indicator lamps 637

Display messages
Possible causes/consequences and M
MSolutions
¸ Replace air cleaner *
Ve hicles with diesel engines: the engine air filter is dirty and must be replaced. #
Consult a qualified specialist workshop.
# 12 V battery See Owner's
Manual *T
he engine is off and the battery charge leve l is too lo w. #
Switch off electrical consumers that are not required. #
Lea vethe engine running for a few minutes, or drive for a longer dis tance.
The battery will charge.
If th e message appears while the engine is running, this indicates an on-board elect rical sy stem malfunction. #
Consult a qualified specialist workshop.
Drive system Malfunction
Visit workshop *T
he drive sy stem is malfunctioning. #
Consult a qualified specialist workshop.
Drive system Malfunction
Stop Switch engine off *T
he drive sy stem is malfunctioning. #
Stop theve hicle immediately, paying attention toroad and traf fic conditions, and switch off the engine. #
Consult a qualified specialist workshop. Display messages and
warning/indicator lamps 641

Display messages
Possible causes/consequences and M
MSolutions
Stop vehicle Leave engine
running Wait Transmission
cooling *T
he transmission is overheating. Pulling away may be temp orarily impaired or not possible. #
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions. Do not
continue driving under any circums tances. #
Lea vethe engine running. #
Wait until the display message disappears before pulling away.
Auxiliary battery malfunc-
tion *T
he auxiliary batteryforth e transmission is no longer being charge d. #
Consult a qualified specialist workshop. #
Untilthen, manually set the transmission toposition jbefore you swit choff the engine. #
Before leaving theve hicle, apply the electric parking brake.
Risk of vehicle rolling away
Apply parking brake See
Owner's Manual *T
he transmission position cannot be identified securel y. #
Use the electric parking brake tosecure theve hicle against rolling away. Ty
res Display messages
Possible causes/consequences and M MSolutions
Tyre pressure Check tyres *T
he tyre pressure loss warning sy stem has de tected a significant loss in pressure. Display messages and
warning/indicator lamps 649