fuel MERCEDES-BENZ GLS-Class SUV 2017 X166 Repair Manual

from the data shown here. You can find the
data applicable to your vehicle on the vehicle
identification plate.
Vehicle identification number (VIN)
XOpen the front right-hand door.
XOpen cover:in the direction of the arrow
and remove it.
You will see the VIN.
The VIN can also be found in the following loca-
tions:
Ron the lower edge of the windshield
(Ypage 378)
Ron the vehicle identification plate
(Ypage 377)
Engine number
:Emission control information plate, includ-
ing the certification of both federal and Cali-
fornian emissions standards
;Engine number (stamped into the crank-
case)
=VIN (on the lower edge of the windshield)
Service products and filling capaci-
ties
Important safety notes
GWARNING
Service products may be poisonous and haz-
ardous to health. There is a risk of injury.
Comply with instructions on the use, storage
and disposal of service products on the labels
of the respective original containers. Always
store service products sealed in their original
containers. Always keep service products out
of the reach of children.
HEnvironmental note
Dispose of service products in an environ-
mentally responsible manner.
Service products include the following:
RFuels
RExhaust gas aftertreatment additives, e.g.
DEF
RLubricants (e.g. engine oil, transmission oil)
RCoolant
RBrake fluid
RWindshield washer fluid
RClimate control system refrigerant
Components and service products must match.
You should therefore only use products that
have been tested and approved by Mercedes-
Benz.
You can identify service products approved by
Mercedes-Benz by the following inscriptions on
the container:
RMB-Freigabe (e.g. MB-Freigabe 229.51)
RMB-Approval (e.g. MB-Approval 229.51)
Other designations or recommendations indi-
cate a level of quality or a specification in
accordance with an MB Sheet Number (e.g. MB 229.5). They have not necessarily been
approved by Mercedes-Benz.
Other identifications, for example:
R0 W-30
R5 W-30
R5 W-40
378Service products and filling capacities
Technical data

Fuel
Important safety notes
GWARNIN G
Fuel is highly flammable .If you handle fuel
incorrectly, there is aris kof fir eand explo-
sion .
You must avoi dfire, open flames, creating
sparks and smoking. Switc hoff th eengin e
and ,if applicable, th eauxiliary heating before
refueling.
GWARNIN G
Fuel is poisonous and hazardous to health.
Ther eis aris kof injury.
You must mak esure that fuel does no tcome
int ocontact wit hyour skin, eyes or clothing
and that it is no tswallowed. Do no tinhale fuel
vapors. Kee pfuel away from children .
If you or other scome int ocontact wit hfuel ,
observ eth efollowing:
RWash away fuel from skin immediately
usin gsoap and water.
RIf fuel comes int ocontact wit hyour eyes,
immediately rinse them thoroughly wit h
clean water. Seek medical assistanc ewith-
out delay.
RIf fuel is swallowed, seek medical assis-
tance without delay. Do no tinduce vomit -
ing .
RImmediately chang eout of clothing whic h
has come int ocontact wit hfuel .
Tank capacity
ModelTotal capa-
city
All models26.4 US gal
(100. 0l)
ModelOf which
reserv e
Mercedes ‑AMG vehiclesApprox.
3. 7US gal
(14.0 l)
Allot her modelsApprox.
3.2 US gal (12.0 l)
Gasoline
Fuel grade
!Do not use diesel to refuel vehicles with a
gasoline engine. Do not switch on the ignition
if you accidentally refuel with the wrong fuel.
Otherwise, the fuel will enter the fuel system.
Even small amounts of the wrong fuel could
result in damage to the fuel system and the
engine. Notify a qualified specialist workshop
and have the fuel tank and fuel lines drained
completely.
!Only refuel using unleaded premium grade
gasoline with at least 91 AKI/95 RON.
iE10 fuel contains up to 10% bioethanol.
Your vehicle is E10-compatible. You can
refuel your vehicle using E10 fuel.
!Only use the fuel recommended. Operating
the vehicle with other fuels can lead to dam-
age to the fuel system, engine and exhaust
system.
!Do not use the following:
RE15 (gasoline with 15% ethanol)
RE85 (gasoline with 85% ethanol)
RE100 (100% ethanol)
RM15 (gasoline with 15% methanol)
RM30 (gasoline with 30% methanol)
RM85 (gasoline with 85% methanol)
RM100 (100% methanol)
RGasoline with metalliferous additives
RDiesel
Do not mix such fuels with the fuel recom-
mended for your vehicle.
!To ensure the longevity and full perform-
ance of the engine, only premium-grade
unleaded gasoline must be used.
Service products and filling capacities379
Technical data
Z

If standard unleaded gasoline is unavailable
and you have to refuel with unleaded gasoline
of a lower grade, observe the following pre-
cautions:
ROnly 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.
RDo not drive at the maximum speed.
RAvoid 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.
iFor 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 (
Ypage 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
GWARNING
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:
Rgasoline
Rdiesel with a bio-diesel content greater
than 5% (e.g. B20)
Rbio-diesel
Rvegetable oil
Rparaffin
Rkerosene
Rmarine diesel
Rheating 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 (
Ypage 154).
Low outside temperatures
iDiesel 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.
380Service products and filling capacities
Technical data