2016 MERCEDES-BENZ GL Owners Manual

If you or others come into contact with fuel,
observe the following: R
Wash away fuel from skin immediately
using soap and water. R
If fuel comes into contact with your eyes,
immediately rinse them thoroughly with
clean water. Seek medical assistance with-
out delay. R
If fuel is swallowed, seek medical assis-
tance without delay. Do not induce vomit-
ing. R
Immediately change out of clothing which
has come into contact with fuel.
G WARNING
Electrostatic buildup can create sparks and
ignite fuel vapors. There is a risk of fire and
explosion.
Always touch the vehicle body before opening
the fuel filler flap or touching the fuel pump
nozzle. Any existing electrostatic buildup is
thereby discharged.
G WARNING
Vehicles with a diesel engine:
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.
! Do not use gasoline to refuel vehicles with
a diesel engine. Do not switch on the igni-
tion 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. The repair
costs are high. Notify a qualified specialist
workshop and have the fuel tank and fuel
lines drained completely.
! Do not use diesel to refuel vehicles with a
gasoline engine. Do not switch on the igni- tion 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 quali-
fied specialist workshop and have the fuel
tank and fuel lines drained completely.
! Overfilling the fuel tank could damage the
fuel system.
! Take care not to spill any fuel on painted
surfaces. You could otherwise damage the
paintwork.
! Use a filter when refueling from a fuel can.
Otherwise, the fuel lines and/or injection
system could be blocked by particles from
the fuel can.
Do not get into the vehicle again during the
refueling process. Otherwise, electrostatic
charge could build up again.
If you overfill the fuel tank, fuel could spray
out when the fuel pump nozzle is removed.
For further information on fuel and fuel quality
( Y
page 447).
Refueling
General information
Pay attention to the important safety notes
( Y
page 182).
The fuel filler flap is unlocked or locked auto-
matically when you unlock or lock the vehicle
with the SmartKey or using KEYLESS-GO.
The position of the fuel filler cap is displayed

Opening the fuel filler flap
C
To open the fuel filler flapD
To insert the fuel filler cap

Problems with fuel and the fuel tank Problem
Possible causes/consequences and P Solutions
Fuel is leaking from the
vehicle.
G WARNING
The fuel line or the fuel tank is faulty.
Risk of explosion or fire. X
Apply the electric parking brake. X
Switch off the engine. X
Remove the SmartKey from the ignition lock.
or, on vehicles with KEYLESS ‑ GO:X
Open the driver's door.
The on-board electronics now have status 0 . This is the same as
the SmartKey having been removed. X
Do not restart the engine under any circumstances. X
Consult a qualified specialist workshop.
The engine does not
start. The fuel tank of a vehicle with a diesel engine has been run com-
pletely dry. X
Refuel the vehicle with at least 5.3 US qt (5 liters) of diesel. X
Turn the ignition on for approximately ten seconds
( Y
page 165). X
Start the engine continuously for up to ten seconds until it runs
smoothly.
If the engine does not start: X
Turn the ignition on again for approximately ten seconds
( Y
page 165). X
Start the engine again continuously for up to ten seconds until it
runs smoothly.
If the engine does not start after three attempts: X
Consult a qualified specialist workshop.
The fuel filler flap can-
not be opened. The fuel filler flap is not unlocked. X
Unlock the vehicle ( Y
page 82).
The SmartKey battery is discharged or nearly discharged. X
Unlock the vehicle using the mechanical key ( Y
page 84).
The fuel filler flap is unlocked, but the opening mechanism is jam-
med. X
Consult a qualified specialist workshop. Refueling 185
Driving and parking Z

DEF (BlueTE C vehicles only )
Important notes on us eTo function properly, BlueTE C exhaus t gas
aftertreatmen t mus t be operated wit h th e
reducing agen t DEF. Addin g DE F is on e of th e
task s performed durin g maintenance . Under
normal operatin g conditions, a tank of DE F
last s until th e next servic e due date.
Whe n th e supply of DE F is almost used up, th e
Check
Additive See Operator' s Manual
message is shown in th e multifunction dis -
play.
If you drive th e vehicle faste r than 10 mph
(16 km/h), th e Check
Additive See Oper‐
ator's Manual message goe s out after
approximately on e minute.
Whe n th e supply of DE F is down to a reserv e
of approximately 1 gal (3. 8 l) th e Refill
DEF See Operator' s Manual message is
shown in th e multifunction display.
Whe n th e DE F supply drops to a minimum , th e
Remaining Starts : 16
message is shown
in th e multifunction display.
If th e Refill DEF No Start in XXX X km
message is shown in th e multifunction dis -
play, you can still drive th e vehicle over th e
distanc e shown . If DE F is no t refilled , you will
subsequently be unable to star t th e engine .
If th e Refill DEF Eng . Start Not Poss.
message appears in th e multifunction display
and th e engin e doe s no t start , you mus t add
DEF. X
Ad d at leas t 1 gal (3.8 l) of DEF.X
Switch on the ignition for at least 60 sec-
onds. X
Start the engine.
i Have the DEF tank refilled at a qualified
specialist workshop.
Use the special DEF refill bottle when adding
DEF between maintenance intervals. Contact
an authorized Mercedes-Benz Center with
any questions or, if necessary, contact Road-
side Assistance ( Y
page 26). If the outside temperature is below 12 ‡
(

water. Seek medical assistance without
delay. R
Change out of clothing contaminated with
DEF immediately.
! Only use DEF in accordance with
ISO 22241. Do not mix any additives with
DEF, and do not dilute DEF with water. This
may destroy the BlueTEC exhaust gas after-
treatment system.
! The vehicle must be parked on level
ground to fill the DEF tank. The DEF tank
can only be filled as intended with the vehi-
cle parked on a level surface. This avoids
false level readings. Filling the tank is not
permitted if the vehicle is not parked on a
level surface. There is a danger of overfill-
ing, which could result in damage to com-
ponents of the BlueTEC exhaust gas after-
treatment.
! Rinse surfaces that have come into con-
tact with DEF immediately with water or
remove DEF using a damp cloth and cold
water. If the DEF has already crystallized,
use a sponge and cold water to clean it. DEF
residues crystallize after time and contam-
inate the affected surfaces.
! DEF is not a fuel additive and must not be
added to the fuel tank. If DEF is added to
the fuel tank, this can lead to engine dam-
age.
For further information on DEF, see
( Y
page 450).
Opening the DEF filler cap The fuel filler flap is unlocked or locked auto-
matically when you open or close the vehicle
with the SmartKey or with KEYLESS-GO. X
Switch the ignition off. X
Press the fuel filler flap in the direction of
arrow C .
The fuel filler flap swings up. X
Turn blue DEF fuel filler cap D counter-
clockwise and remove it.
DEF filler cap D is secured with a plastic
strip.
DEF refill canisters
! Do not tighten the disposable hose with
too much force. The disposable hose may
otherwise be destroyed.
X
Unscrew the cap from the opening on top of
DEF refill canister D . X
Place disposable hose C on the opening of
DEF refill canister D and screw it on clock-
wise until hand-tight. Refueling 187
Driving and parking Z

i Disposable hose C remains closed until
you fasten disposable hose C to the DEF
filler neck of the vehicle. X
Place disposable hose C on the filler neck
on the vehicle and screw it on clockwise
until hand-tight. When you feel resistance,
disposable hose C is sufficiently secured.X
Lift up and tip DEF refill canister D .
i Filling stops when the DEF tank is com-
pletely filled. Do not fill the DEF tank any
further. DEF refill canister D can be
removed when it has been only partially
emptied. X
Turn disposable hose C on the filler neck
of the vehicle counter-clockwise and
remove it. X
Turn disposable hose C on the opening of
DEF refill canister D counter-clockwise
and remove it. X
Reseal DEF refill canister D with the cap.
DEF refill canisters can be obtained at many
gas stations or at an authorized Mercedes-
Benz Center. DEF refill canisters are often
sold with a filler hose. A filler hose that does
not exactly fit the vehicle's DEF tank offers no
protection against overfilling. DEF may leak if
overfilled. Mercedes-Benz offers a special
disposable hose with overfill protection. You
can obtain this from any authorized
Merced es-Benz Center. DEF is available in a
variety of containers and receptacles. Only
use the disposable hose with the Mercedes-
Benz DEF refill canisters.
DEF refill bottle
! Only screw on the DEF refill bottle hand-
tight. It could otherwise be damaged. X
Unscrew the protective cap from DEF refill
bottle C . X
Place DEF refill bottle C on the filler neck
as shown and screw it on clockwise until
hand-tight. X
Press DEF refill bottle C towards the filler
neck.
The DEF tank is filled. This may take up to
one minute.
i When DEF refill bottle C is no longer
pressed, filling stops and the bottle may be
taken off again after being only partially
emptied. X
Release DEF refill bottle C .X
Turn DEF refill bottle C counter-clockwise
and remove it. X
Screw the protective cap onto DEF refill
bottle C again.
DEF refill bottles can be obtained at many gas
stations or at an authorized Mercedes-Benz
Center. Refill bottles without a threaded cap
do not provide overfill protection. DEF may
leak if overfilled. Mercedes Benz offers spe-
cial refill bottles with a threaded seal. These
are available at any authorized Mercedes-
Benz Center.188
Refueling
Driving an d parking

Closing the DEF filler cap X
Install DEF filler cap D on the filler neck
and turn it clockwise. X
To close the fuel filler flap, press it in the
direction of arrow C .X
Drive faster than 10 mph (16 km/h).
The Check Additive See Operator's
Manual message goes out after approx-
imately one minute.
i If the Check Additive See Opera‐
tor's Manual message continues to be
shown in the multifunction display, you
must add more DEF.
Parking
Important safety notes
G WARNING
Flammable material such as leaves, grass or
twigs may ignite if they come into contact with
hot parts of the exhaust system or exhaust
gas flow. There is a risk of fire.
Park the vehicle so that no flammable mate-
rials come into contact with parts of the vehi-
cle which are hot. Take particular care not to
park on dry grassland or harvested grain
fields.
G WARNING
If you switch off the ignition while driving,
safety-relevant functions are only available
with limitations, or not at all. This could affect,
for example, the power steering and the brake
boosting effect. You will require considerably more effort to steer and brake. There is a risk
of an accident.
Do not switch off the ignition while driving.
G WARNING
If you leave children unsupervised in the vehi-
cle, they could set it in motion by, for example: R
release the parking brake. R
shift the automatic transmission out of the
parking position P . R
start the engine.
In addition, they may operate vehicle equip-
ment and become trapped. There is a risk of
an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
! Always secure the vehicle correctly
against rolling away. Otherwise, the vehicle
or its drivetrain could be damaged.
To ensure that the vehicle is secured against
rolling away unintentionally: R
the electric parking brake must be applied. R
the transmission must be in position P and
the SmartKey must be removed from the
ignition lock. R
the front wheels must be turned towards
the curb on steep uphill or downhill gradi-
ents. R
the empty vehicle must be secured at the
front axle with a wheel chock or similar, for
example, on uphill or downhill gradients. R
a laden vehicle must also be secured at the
rear axle with a wheel chock or similar, for
example, on uphill or downhill gradients.
Switching off the engine
Important safety notes
G WARNING
The automatic transmission switches to neu-
tral position N when you switch off the engine.Parking 189
Driving and parking Z

The vehicle may roll away. There is a risk of an
accident.
After switching off the engine, always switch
to parking position P . Prevent the parked vehi-
cle from rolling away by applying the parking
brake.
Using the SmartKey X
Apply the electric parking brake. X
Shift the transmission to position P .X
Turn the SmartKey to position 0 in the igni-
tion lock and remove it.
The immobilizer is activated.
If you switch the engine off with the trans-
mission in position R or D , the automatic
transmission shifts to N automatically.
If you then open the driver's door or the front-
passenger door or remove the SmartKey from
the ignition, the automatic transmission
shifts to P automatically.
If you want the automatic transmission to
remain in neutral N , e.g. when having the
vehicle cleaned in an automatic car wash with
a towing system: X
Switch on the ignition. X
Depress the brake pedal and keep it
depressed. X
Shift to neutral N .X
Release the brake pedal. X
Release the electric parking brake. X
Switch off the ignition and leave the Smart-
Key in the ignition lock.
Using KEYLESS-GO X
Apply the electric parking brake. X
Shift the transmission to position P .X
Press the Start/Stop button ( Y
page 165)
The engine stops and all the indicator
lamps in the instrument cluster go out.
If you switch the engine off with the trans-
mission in position R or D , the automatic
transmission shifts to N automatically. If you then open the driver's or front-
passenger door, the automatic transmission
shifts to P automatically.
If you want the automatic transmission to
remain in neutral N , e.g. when having the
vehicle cleaned in an automatic car wash with
a towing system: X
Remove the Start/Stop button from the
ignition lock. X
Insert the SmartKey into the ignition lock. X
Switch on the ignition. X
Depress the brake pedal and keep it
depressed. X
Shift to neutral N . X
Release the brake pedal. X
Release the electric parking brake. X
Switch off the ignition and leave the Smart-
Key in the ignition lock.
i The engine can be switched off in an
emergency while the vehicle is in motion by
pressing and holding the Start/Stop button
for three seconds.
Electric parking brake
General notes
G WARNING
If you leave children unsupervised in the vehi-
cle, they could set it in motion by, for example: R
release the parking brake. R
shift the automatic transmission out of the
parking position P .R
start the engine.
In addition, they may operate vehicle equip-
ment and become trapped. There is a risk of
an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.190
Parking
Driving and parking