2017 MERCEDES-BENZ GLS warning

G WARNING
If you tighten the wheel bolts or wheel nuts
when the vehicle is raised, the jack could tip
over. There is a risk of injury.
Only tighten the wheel bolts or wheel nuts
when the vehicle is on the ground.
! To prevent damage to the paintwork, hold
the wheel securely against the wheel hub
while screwing in the first wheel bolt.
Always pay attention to the instructions and
safety notes in the "Changing a wheel" section
( Y
page 366).
Only use wheel bolts that have been designed
for the wheel and the vehicle. For safety rea-
sons, Mercedes-Benz recommends that you
only use wheel bolts which have been approved
for Mercedes-Benz vehicles and the respective
wheel.
! Always use wheel bolts D to mount the
"Minispare" emergency spare wheel. Using
other wheel bolts to mount the "Minispare"
emergency spare wheel could damage the
brake system.
C
Wheel bolts for all wheels supplied by the
factory and for the collapsible spare wheel
(Mercedes-AMG GLE 63)
D
Wheel bolts for the collapsible spare wheel X
Clean the wheel and wheel hub contact sur-
faces. X
Slide the wheel to be mounted onto the align-
ment bolt and push it on. X
Tighten the wheel bolts until they are finger-
tight. X
Unscrew the alignment bolt. X
Tighten the last wheel bolt until it is finger-
tight. X
Mercedes-AMG vehicles with a collapsi-
ble spare wheel: inflate the collapsible spare
wheel ( Y
page 374).
Only then lower the vehicle.
Lowering the vehicle
G WARNING
The wheels could work loose if the wheel nuts
and bolts are not tightened to the specified
tightening torque. There is a risk of accident.
Have the tightening torque immediately
checked at a qualified specialist workshop
after a wheel is changed.
! Mercedes-AMG vehicles with a collapsi-
ble spare wheel: before lowering the vehicle,
inflate the collapsible spare wheel with the
tire inflation compressor. The wheel rim could
otherwise be damaged. X
Place the ratchet wrench onto the hexagon
nut of the jack so that the letters AB are visi-
ble. X
Turn the ratchet wrench until the vehicle is
once again standing firmly on the ground. X
Place the jack to one side.370
Changing a wheel
Wheels and tires

Notes on the vehicle equipment – always equip
the vehicle: R
with tires of the same size on a given axle (left
and right) R
with the same type of tires at a given time
(summer tires, winter tires, MOExtended
tires)
Vehicles equipped with MOExtended tires are
not equipped with a TIREFIT kit at the factory. It
is therefore recommended that you additionally
equip your vehicle with a TIREFIT kit if you mount
tires that do not feature run-flat properties, e.g.
winter tires. A TIREFIT kit may be obtained from
a qualified specialist workshop.
Emergency spare wheel
Important safety notes
G WARNING
The wheel or tire size as well as the tire type of
the spare wheel or emergency spare wheel
and the wheel to be replaced may differ.
Mounting an emergency spare wheel may
severely impair the driving characteristics.
There is a risk of an accident.
To avoid hazardous situations: R
adapt your driving style accordingly and
drive carefully. R
never mount more than one spare wheel or
emergency spare wheel that differs in size. R
only use a spare wheel or emergency spare
wheel of a different size briefly. R
do not switch ESP ®
off.R
have a spare wheel or emergency spare
wheel of a different size replaced at the
nearest qualified specialist workshop.
Observe that the wheel and tire dimensions
as well as the tire type must be correct.
! Mercedes-AMG vehicles with
"Minispare" emergency spare wheel: only
use the "Minispare" emergency spare wheel
on the rear axle . If you mount the
"Minispare" emergency spare wheel on the
front axle, this could result in damage to the
brake system. If a tire on the front axle is defective, an intact
wheel from the rear axle must first be
replaced with the "Minispare" emergency
spare wheel. The damaged wheel on the front
axle can then be replaced by the undamaged
wheel from the rear axle.
Make sure to note the placard on the
"Minispare" emergency spare wheel.
When using an emergency spare wheel or spare
wheel of a different size, you must not exceed
the maximum speed of 50 mph (80 km/h).
Snow chains must not be mounted on emer-
gency spare wheels.
General notes You can ask for information regarding permitted
emergency spare wheels at an authorized
Mercedes-Benz Center.
Mounting the emergency spare wheel is descri-
bed under "Mounting a wheel" ( Y
page 367).
You should regularly check the pressure of the
emergency spare wheel, particularly prior to
long trips, and correct the pressure as neces-
sary ( Y
page 349). The value on the wheel is
valid.
An emergency spare wheel may also be moun-
ted against the direction of rotation. Observe
the time restriction on use as well as the speed
limitation specified on the emergency spare
wheel.
Replace the tires after six years at the latest,
regardless of wear. This also applies to the
emergency spare wheel.
When you are driving with the collapsible spare
wheel mounted, the tire pressure loss warning
system or the tire pressure monitor cannot func-
tion reliably. Only restart the tire pressure loss
warning system or tire pressure monitor when
the defective wheel has been replaced with a
new wheel.
Vehicles with tire pressure monitor: after
mounting an emergency spare wheel, the sys-
tem may still display the tire pressure of the
removed wheel for a few minutes. The value dis-
played for the mounted emergency spare wheel
is not the same as the current tire pressure of
the emergency spare wheel.372
Emergency spare wheel
Wheels and tires

If standard unleaded gasoline is unavailable
and you have to refuel with unleaded gasoline
of a lower grade, observe the following pre-
cautions: R
Only fill the fuel tank to half full with regular
unleaded gasoline and fill the rest with pre-
mium-grade unleaded gasoline as soon as
possible. R
Do not drive at the maximum speed. R
Avoid sudden acceleration and engine
speeds over 3,000 rpm.
You will usually find information about the fuel
grade on the pump. If you cannot find the label
on the pump, ask the staff for assistance.
i For further information, consult a qualified
specialist workshop or visit
http://www.mbusa.com (USA only).
As a temporary measure, if the recommended
fuel is not available, you may also use regular
unleaded gasoline with an octane rating of
87 AKI/91 RON. This may reduce engine per-
formance and increase fuel consumption. Avoid
driving at full throttle and sudden acceleration.
Never refuel using gasoline with a lower AKI.
Information on refueling ( Y
page 154).
Additives
! Operating the engine with fuel additives
added later can lead to engine failure. Do not
mix fuel additives with fuel. This does not
include additives for the removal and preven-
tion of residue buildup. gasoline must only be
mixed with additives recommended by
Mercedes-Benz. Comply with the instructions
for use on the product label. More information
about recommended additives can be
obtained from any authorized Mercedes-Benz
Center.
Mercedes-Benz recommends that you use bran-
ded fuels that have additives.
The fuel quality available in some countries may
not be sufficient. Residue could build up in the
fuel injection system as a result. In such cases,
and in consultation with an authorized
Mercedes-Benz Center, the fuel may be mixed
with the cleaning additive recommended by
Mercedes-Benz. You must observe the notes
and mixing ratios specified on the container. Diesel Fuel grade
G WARNING
If you mix diesel fuel with gasoline, the flash
point is lower than that of pure diesel fuel.
When the engine is running, exhaust system
components could overheat without being
noticed. There is a risk of fire.
Never refuel with gasoline. Never mix gasoline
with diesel fuel.
! Only use Ultra Low Sulfur Diesel (ULSD),
otherwise it may lead to increased wear and
damage to the fuel system, engine and
exhaust system.
! Do not use the following: R
gasoline R
diesel with a bio-diesel content greater
than 5% (e.g. B20) R
bio-diesel R
vegetable oil R
paraffin R
kerosene R
marine diesel R
heating oil
Do not mix such fuels with diesel fuel and do
not use any special additives. Otherwise,
engine damage may occur.
! In countries outside USA and Canada, only
use sulfur-free diesel with a sulfur content
under 50 ppm. Otherwise, the emission con-
trol system could be damaged.
You will usually find information about the fuel
grade on the pump. If you cannot find the label
on the pump, ask the staff for assistance.
Information on refueling ( Y
page 154).
Low outside temperatures
i Diesel fuel with improved cold flow proper-
ties is available during the winter months.
Further information about fuel properties can
be obtained from oil companies, e.g. at gas
stations.380
Service products and filling capacities
Technical data

Gasoline engines MB-Freigabe or
MB-Approval
All models
229.5
Diesel engines MB-Freigabe or
MB-Approval
GLS 350 d 4MATIC
228.51, 229.31,
229.51, 229.52
Mercedes-AMG vehicles: only use SAE 0W-40
or SAE 5W-40 engine oils.
i MB approval is indicated on the oil contain-
ers.
Filling capacities The following values refer to an oil change
including the oil filter.
Model Capacity
GLS 350 d 4MATIC
8.5 US qt (8.0 l)
GLS 550 4MATIC
Mercedes ‑ AMG
vehicles 9.0 US qt (8.5 l)
Al l ot her models
7.4 US qt (7.0 l)
Ad ditives
! Do not use any additives in the engine oil.
This could damage the engine.
Brake fluid
G WARNING
The brake fluid constantly absorbs moisture
from the air. This lowers the boiling point of
the brake fluid. If the boiling point of the brake
fluid is too low, vapor pockets may form in the
brake system when the brakes are applied
hard. This would impair braking efficiency.
There is a risk of an accident.
You should have the brake fluid renewed at
the specified intervals. Comply with the important safety notes for ser-
vice products when handling brake fluid
( Y
page 378).
The brake fluid change intervals can be found in
the Maintenance Booklet.
Only use brake fluid approved by Mercedes-
Benz in accordance with MB-Freigabe or MB-
Approval 331.0.
Information about approved brake fluid can be
obtained at any qualified specialist workshop or
on the Internet at
http://bevo.mercedes-benz.co m.
i Have the brake fluid regularly replaced at a
qualified specialist workshop in accordance
with the replacement intervals and the
replacement confirmed in the Maintenance
Booklet.
Coolant
Important safety notes
G WARNING
If antifreeze comes into contact with hot com-
ponents in the engine compartment, it may
ignite. There is a risk of fire and injury.
Let the engine cool down before you add anti-
freeze. Make sure that antifreeze is not spilled
next to the filler neck. Thoroughly clean the
antifreeze from components before starting
the engine.
! Only add coolant that has been premixed
with the desired antifreeze protection. You
could otherwise damage the engine.
Further information on coolants can be found
in the Mercedes-Benz Specifications for Ser-
vice Products, MB BeVo 310.1, e.g. on the
Internet at http://bevo.mercedes-benz.com.
Or contact a qualified specialist workshop.
! Always use a suitable coolant mixture, even
in countries where high temperatures prevail.
Otherwise, the engine cooling system is not
sufficiently protected from corrosion and
overheating.
i Have the coolant regularly replaced at a
qualified specialist workshop and the replace-
ment confirmed in the Maintenance Booklet.382
Service products and filling capacities
Technical data

Comp ly wit h the impo rtant safety notes for ser-
vice products when han dlin g coolant
( Y
page 378).
The coolant is a mixture of water and ant i-
freeze/corrosion inh ibit or. It is respon sible for
the foll owin g:R
Anti-corrosion protection R
Antifreeze protection R
Raisin g the boiling poin t
If the coolant has antifreeze protection down to
-35 ‡ (-37 †), the boilin g poin t of the coolant
during operation is appr oximately 266 ‡
(130 †).
The antifreeze concentrate /c orrosion inh ibit or
concentration in the engine co olin g system
sho uld: R
be at least 50 %. This will protect the engine
co olin g system against freezing down to
approximate ly -35 ‡ (-37 †).R
not exceed 55% (antifreeze protection down
to -49 ‡ [-45 †]). Otherwise, heat will not be
dissipat ed as effectively.
Mercedes-Benz recommen ds an antifreeze/
corrosion inh ibit or concentrate in accordance
wit h MB Spe cifications for Service Products
310.1.
i When the veh icle is first deliv ere d, it is fille d
wit h a coolant mixture that ensures adequate
antifreeze and anti-corrosion protection.
i The coolant is checked wit h every mainte-
nance interval at a qualif ied spec ialist work-
sho p.
Filling capacities Model Capacity
Mercedes ‑ AMG
vehicles Approx. 11.9 US qt
(11.3 l)
GLS 350 d 4MAT IC
Approx. 12.2 US qt
(11.5 l)
GLS 550 4MATIC
Approx. 12.0 US qt
(11.4 l)
All other mod els
Approx. 10.3 US qt
(9.7 l) Windshield washer system
Important safety notes
G WARNING
Windshield washer concentrate could ignite if
it comes into contact wit h hot engine compo-
nents or the exhaust system. There is a risk of
fire and injury.
Make sure that no windshie ld washer con-
centrate is spilled next to the filler neck.
! On ly MB SummerFit and MB WinterF it
washer fluid should be mixed together. The
spray nozzles may otherwise become
blocked.
Do not use distilled or de-ionized water. Other-
wise, the level sensor may give a false reading.
When handling washer fluid, observe the impor-
tant safety notes on service products
( Y
page 378).
At temperatures above freezing: X
Fill the washer fluid reservoir wit h a mixture of
water and windshie ld washer fluid, e.g. MB
SummerFit.
Add 1 part MB SummerFit to 100 parts water.
At temperatures below freezing: X
Fill the washer fluid reservoir wit h a mixture of
water and washer fluid, e.g. MB WinterFit.
For the correct mixing ratio refer to the infor-
mation on the antifreeze reservoir.
i Add windshie ld washer fluid, e.g. MB Sum-
merFit or MB WinterFit, to the washer fluid all
year roun d.
Climate control system refrigerant
Important safety notes The clim ate control system of your vehicle is fil-
led wit h refrigerant R ‑ 134a.
The instruction label regarding the refrigerant
type used can be found on the radiator cross
member.
! Only the refrigerant R ‑ 134a and the PAG oil
approved by Mercedes-Benz may be used.
The appr oved PAG oil may not be mixed wit h
any other PAG oil that is not appr oved forService products and filling capacities 383
Technical data Z

R-134 a refrigerant. Otherwise, th e climat e
control system may be damaged.
Service work, suc h as refillin g wit h refrigeran t or
replacing component parts, may only be carrie d
out by a qualified specialist workshop. All appli-
cable regulations, as well as SA E standard J639,
mus t be adhered to .
Always hav e wor k on th e climat e control system
carrie d out at a qualified specialist workshop.
Refrigerant instruction label
Example: refrigeran t instruction label
C
Warning symbolD
Refrigerant filling capacit y