MERCEDES-BENZ GLS 2018 Owners Manual
Page 161 of 398
When the DEF supply drops to a minimum, the
Remaining Starts: 16 message is shown in
the multifunction display.
If the Remaining Starts: 16 message
appears in the multifunction display, you can
start the engine another 16 times. If DEF is not
refilled, you will subsequently be unable to
start the engine .X
Add at least 2 gal (7.5 l) of DEF.X
Switch on the ignition for at least 60 seconds. X
Start the engine.
i Have the DEF tank refilled at a qualified spe-
cialist workshop.
Use the special DEF refill bottle when adding
DEF between maintenance intervals. You can
obtain further information from an authorized
Mercedes-Benz Center or, if necessary, contact
Roadside Assistance ( Y
page 29).
If the outside temperature is below 12 ‡
(
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Opening/closing 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
To open: 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-clock-
wise and remove it.
DEF filler cap D is secured with a plastic
strip. X
To close: place 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 Operator's
Manual message continues to be shown in
the multifunction display, you must add more
DEF.
DEF refill canisters
! Do not screw the disposable hose on too
tight. The disposable hose could otherwise be
damaged and DEF may leak out. 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.
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, dispos-
able hose C is sufficiently secured. X
Lift up and tip DEF refill canister D .
Filling stops when the DEF tank is completely
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 are available at many gas
stations or at a qualified specialist workshop.
DEF refill canisters are often sold with a filler
hose. A filler hose that does not exactly fill the
vehicle's DEF tank offers no protection against160
Refueling
Driving and parking
Page 163 of 398
overfilling. DEF may leak if overfilled. Mercedes-
Benz offers a special disposable hose with over-
fill protection. You can obtain this from any
authorized Mercedes-Benz Center. DEF is avail-
able 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. Otherwise, the thread of the DEF refill
bottle could be damaged and DEF could leak
out.
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 emp-
tied. 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 bot-
tle C again.
DEF refill bottles are available at many gas sta-
tions or at a qualified specialist workshop. Refill
bottles without a threaded cap do not provide
overfill protection. DEF may leak if overfilled.
Mercedes Benz offers special refill bottles with a
threaded seal. These are available at any author-
ized Mercedes-Benz Center. 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 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 driv-
etrain 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 ] and
the SmartKey must be removed from the igni-
tion lock R
the front wheels must be turned towards the
curb on steep uphill or downhill gradients 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 Parking 161
Driving and parking Z
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Switching off the engine
G WARNING
The automatic transmission switches to neu-
tral position N when you switch off the engine.
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. X
Apply the electric parking brake. X
Shift the transmission to position ] .X
With the SmartKey: turn the SmartKey to
position