Problems with fuel and the fuel tank
This section provides descriptions of and solutions to safety-relevant problems. Descriptions
of and solutions to further problems can be found in the Digital Operator's Manual.
ProblemPossible causes/consequences and MSolutions
Fuel is leaking from the
vehicle.GWARNING
The fuel line or the fuel tank is faulty.
Risk of explosion or fire.
XApply the electric parking brake.
XSwitch off the engine.
XRemove the SmartKey from the ignition lock.
or, on vehicles with KEYLESS‑GO:
XOpen the driver's door.
The on-board electronics now have status 0. This is the same as
the SmartKey having been removed.
XDo not restart the engine under any circumstances.
XConsult a qualified specialist workshop.
DEF (BlueTEC vehicles only)
Important notes on use
To function properly, BlueTEC exhaust gas
aftertreatment must be operated with the
reducing agent DEF. Adding DEF is one of the
tasks performed during maintenance. Under
normal operating conditions, a tank of DEF
lasts until the next service due date.
When the supply of DEF is almost used up, the
Check
AdditiveSeeOperator'sManual
message is shown in the multifunction dis-
play.
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.
XAdd at least 1 gal (3.8 l)of DEF.
XSwitch on the ignition for at least 60 sec-
onds.
XStart the engine.
iHave 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 (
Ypage 29).
If the outside temperature is below 12 ‡
(Ò11 †) it may be difficult to top up. If DEF is frozen and there is an active warning indica-
tor, it may not be possible to add DEF. Park
the vehicle in a warmer place, e.g. in a garage,
until DEF has become fluid again. It will then
be possible to add DEF again. Alternatively,
have the DEF tank refilled at a qualified spe-
cialist workshop.
Further information about BlueTEC exhaust
gas aftertreatment and DEF is available at any
authorized Mercedes-Benz Center.
Refueling149
Driving and parking
Z
Emission control
GWARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases leads to poisoning. There
is a risk of fatal injury. Therefore never leave
the engine running in enclosed spaces with-
out sufficient ventilation.
Certain engine systems are designed to keep
the level of poisonous components in exhaust
fumes within legal limits.
These systems only work at peak efficiency if
they are serviced exactly in accordance with
the manufacturer's specifications. For this
reason, only have work on the engine carried
out by qualified and authorized Mercedes-
Benz technicians.
The engine settings must not be changed
under any circumstances. Furthermore, all
specific service work must be carried out at
regular intervals and in accordance with the
Mercedes-Benz service requirements. Details
can be found in the Maintenance Booklet.
ECO display
You can find information about this in the
Digital Operator's Manual.
Braking
Important safety notes
GWARNING
If you shift down on a slippery road surface in an attempt to increase the engine's braking
effect, the drive wheels could lose their grip.
There is an increased danger of skidding and
accidents.
Do not shift down for additional engine brak-
ing on a slippery road surface.
Downhill gradients
You can find information about this in the
Digital Operator's Manual.
Heavy and light loads
GWARNING
If you rest your foot on the brake pedal while
driving, the braking system can overheat. This increases the stopping distance and can even
cause the braking system to fail. There is a
risk of an accident.
Never use the brake pedal as a footrest. Never
depress the brake pedal and the accelerator
pedal at the same time.
Further information can be found in the Digi-
tal Operator's Manual.
Wet roads
You can find information about this in the
Digital Operator's Manual.
Limited braking performance on salt-
treated roads
You can find information about this in the
Digital Operator's Manual.
Servicing the brakes
You can find information about this in the
Digital Operator's Manual.
AMG high-performance and ceramic
brakes
You can find information about this in the
Digital Operator's Manual.
154Driving tips
Driving and parking
!The vehicle is lowered by about 0.8 in
(20 mm) if:
Ryou have selected "Comfortable tuning"
Ryou switch off the engine and then
Ryou lock the vehicle within approximately
60 seconds
When parking, position your vehicle so that
it does not make contact with the curb as
the vehicle is lowered. Your vehicle could
otherwise be damaged.
Vehicle level
Important safety notes
GWARNING
When the vehicle is being lowered, people
could become trapped if their limbs are
between the vehicle body and the wheels or
underneath the vehicle. There is a risk of
injury.
Make sure no one is underneath the vehicle or
in the immediate vicinity of the wheel arches
when the vehicle is being lowered.
The vehicle may be lowered if you press the
suspension setting selector button or the
AMG button. The vehicle also lowers if it is
stationary.
!If Sport or Sport + suspension tuning has
been selected, the vehicle's ground clear-
ance decreases. Make sure that no objects
become trapped or that the vehicle does
not become damaged, for example, on the
curb.
iThe vehicle level may change visibly at the
rear axle if you park the vehicle and the
outside temperature changes. If the tem-
perature drops, the vehicle level lowers;
with an increase in temperature, the vehi-
cle level rises.
4MATIC (permanent four-wheel drive)
If you fail to adapt your driving style, 4MATIC
can neither reduce the risk of accident nor override the laws of physics. 4MATIC cannot
take account of road, weather and traffic con-
ditions. 4MATIC is only an aid. You are
responsible for the distance to the vehicle in
front, for vehicle speed, for braking in good
time and for staying in your lane.
If a drive wheel spins due to insufficient grip:
ROnly depress the accelerator pedal as far as
necessary when pulling away.
RAccelerate less when driving.
!Never tow the vehicle with one axle
raised. This may damage the transfer case.
Damage of this sort is not covered by the
Mercedes-Benz Limited Warranty. All
wheels must remain either on the ground or be fully raised. Observe the instructions for
towing the vehicle with all wheels in full
contact with the ground.
iIn wintry driving conditions, the maximum
effect of 4MATIC can only be achieved if
you use winter tires (M+S tires), with snow
chains if necessary.
4MATIC ensures that all four wheels are per-
manently driven. Together with ESP
®, it
improves the traction of your vehicle when-
ever a drive wheel spins due to insufficient
grip.
PARKTRONIC
Important safety notes
PARKTRONIC is an electronic parking aid with
ultrasonic sensors. It monitors the area
around your vehicle using six sensors in the
front bumper and six sensors in the rear
bumper. PARKTRONIC indicates visually and
audibly the distance between your vehicle
and an object.
PARKTRONIC is only an aid. It is not a replace-
ment for your attention to your immediate
surroundings. You are always responsible for
safe maneuvering, parking and exiting a park- ing space. When maneuvering, parking or
pulling out of a parking space, make sure that
168Driving systems
Driving and parking
Under the following circumstances, the rear
view camera will not function, or will function
in a limited manner:
Rif the trunk lid or tailgate is open
Rin heavy rain, snow or fog
Rat night or in very dark places
Rif the camera is exposed to very bright light
Rif the area is lit by fluorescent bulbs or LED
lighting (the display may flicker)
Rif there is a sudden change in temperature,
e.g. when driving into a heated garage in
winter
Rif the camera lens is dirty or obstructed.
Observe the notes on cleaning
(
Ypage 268)
Rif the rear of your vehicle is damaged. In this
event, have the camera position and setting
checked at a qualified specialist workshop
The field of vision and other functions of the
rear view camera may be restricted due to
additional accessories on the rear of the vehi-
cle (e.g. license plate holder, bicycle rack).
On vehicles with height-adjustable chassis,
leaving the standard height can result in inac-
curacies in the guide lines, depending on
technical conditions.
iThe rear view camera is protected from
raindrops and dust by means of a flap.
When the rear view camera is activated,
this flap opens.
The flap closes again when:
Ryou have finished the maneuvering proc-
ess
Ryou switch off the engine
Ryou open the trunk
Observe the notes on cleaning
(
Ypage 268).
For technical reasons, the flap may remain
open briefly after the rear view camera has
been deactivated.
!Objects not at ground level may appear to
be further away than they actually are, e.g.:
Rthe bumper of a parked vehicle
Rthe drawbar of a trailer
Rthe ball coupling of a trailer tow hitch
Rthe rear section of an HGV
Ra slanted post
Use the guidelines only for orientation.
Approach objects no further than the bot-
tom-most guideline.
The rear view camera may show a distorted
view of obstacles, show them incorrectly or
not at all. The rear view camera does not show
objects in the following positions:
Rvery close to the rear bumper
Runder the rear bumper
Rin the area immediately above the tailgate
handle
Activating/deactivating the rear view
camera
XTo activate: make sure that the SmartKey
is in position 2in the ignition lock.
XMake sure that the Activation by R
gearfunction is selected in Audio 20 or
COMAND, see the Digital Operator's Man-
ual.
XEngage reverse gear.
The rear view camera flap opens. The area
behind the vehicle is shown with guide lines
in the Audio 20 or COMAND display.
The image from the rear view camera is
available throughout the maneuvering
process.
To deactivate: the rear view camera deacti-
vates if you shift the transmission to Por after
driving forwards a short distance.
172Driving systems
Driving and parking
Information in the Digital Operator's
Manual
Inthe Digital Operator's Manual you willfind
information on the following topics:
RMessages inthe Audio 20 or COMAND dis-
play
R"Reverse parking" function
RWide-ang lefunction
360° camera
General notes
The 360° camera isa system consisting of
four cameras.
The system analyzes images from the fol low-
ing cameras:
RRear view camera
RFront camera
RTwo cameras inthe exterior rear view mir-
rors
The cameras capture the immediate sur-
roun dings of the vehicle. The system sup-
ports you, e.g. when parking or if vision is
restricted at an exit.
You can show pictures from the 360° camera
in full-screen mode or in six different split-
screen views on the COMAND/A udio20 dis-
play. A split-screen view also includes a top
view of the vehicle. This view iscalculated
from the data supplied by the installed cam-
eras (virtual camera).
The six split-screen views are:
Rtop view and picture from the rear view
camera (130° viewing angle)
Rtop view and image from the front camera
(130° viewing angle without displaying the
maximum steering wheel angle)
Rtop view and enlarged rear view
Rtop view and enlarged front view
Rtop view and images from the side mirror
cameras (rear wheel view)
Rtop view and images from the sidemirror
cameras (front wheel view) When the function
isactive and you shift the
transmission from Dor Rto N, the dynamic
guidelines are hidden.
When you change between transmission
posit ionsDand R, you see the prev
iously
selected front or rear view.
Distances measured byPARKTRONIC will
also beoptical lydisplayed:
Rin split screen viewas red or yellow brack-
ets around the vehicle icon inthe top view,
or
Rat the bottom right as red or yellow brack-
ets around the vehicle symbol infull-screen
mode
The line thickness and color of the brackets
show how far the vehicle isfrom an object.
Ryellow brackets with th inlines:
PARKTRONIC isactive
Ryellow brackets with normal lines: an
object ispresent inclose range of the veh i-
cle
Rred line: an object ispresent inthe imme-
diat e close range of the vehicle
Important safety notes
The 360°camera isonly an aid and may show
a distorted viewof obstacles, show them
incorrectly or not at all. The 360°camera is
not a substitute for attenti vedriving.
You are always responsible for safe maneu-
vering and parking. When maneuvering or
parking, make sure that there are no persons,
animals or objects inthe area in which you are
maneuvering.
You are always responsible for safety, and
must always pay attention to your surround-
ings when parking and maneuvering. This
applie s to the areas behind, infront of and
beside the vehicle. You could otherwise
endanger yourself and others.
The 360° camera willnot function or will
function ina limited manner:
Rifthe doors are open
Rifthe exterior mirrors are folded in
Driving systems173
Driving and parking
Z
Rif the trunk lid/tailgate is open
Rin heavy rain, snow or fog
Rat night or in very dark places
Rif the cameras are exposed to very bright
light
Rif the area is lit by fluorescent bulbs or LED
lighting (the display may flicker)
Rif there is a sudden change in temperature,
e.g. when driving into a heated garage in
winter
Rif the camera lenses are dirty or covered
Rif the vehicle components in which the
cameras are installed are damaged. In this
event, have the camera position and setting
checked at a qualified specialist workshop.
Do not use the 360° camera in this case. You
can otherwise injure others or cause damage to objects or the vehicle.
Guide lines are always shown at road level.
On vehicles with height-adjustable chassis,
depending on technical conditions, leaving
the standard height can result in:
Rinaccuracies in the guide lines
Rinaccuracies in the display of generated
images (top view)
Activation conditions
The 360° camera image can be displayed if:
Ryour vehicle is equipped with a 360° cam-
era
Rthe SmartKey is in position 2in the ignition
lock
RCOMAND/Audio 20 is switched on
Rthe 360° Camerafunction is switched on
Switching on the 360° camera
XPress the Øbutton in the center con-
sole for longer than two seconds.
Depending on whether position Dor Ris
engaged, the following is shown:
Ra split screen with top view and the
image from the front camera or
Ra split screen with top view and the
image from the rear view camera
or
XPress the Øbutton in the center con-
sole.
The vehicle menu is displayed.
XSelect 360° Cameraand press 7to con-
firm.
Depending on whether position Dor Ris
engaged, the following is shown:
Ra split screen with top view and the
image from the front camera or
Ra split screen with top view and the
image from the rear view camera
Activating the 360° camera using
reverse gear
The 360° camera images can be automati-
cally displayed by engaging reverse gear.
XMake sure that the SmartKey is in position
2 in the ignition lock.
XMake sure that the Activation by R
gearfunction is selected in COMAND/
Audio 20 (see the separate COMAND/
Audio 20 operating instructions).
XTo show the 360° camera image: engage
reverse gear.
The area behind the vehicle is shown in the
COMAND/Audio 20 display in split-screen
mode. You see the top view of the vehicle
and the image from the rear view camera.
Selecting the split-screen and full
screen displays
Switching between split screen views
XTo switch to the line with the vehicle icons:
slide 5the controller.
XTo select one of the vehicle icons: turn
3 the controller.
174Driving systems
Driving and parking
XTo switch to180° View:turn 3 the
controller to select 180° View
and press
7 to confirm.
iThe 180° Viewoption is only available in
the following views:
RTop view with picture from the rear view
camera
RTop view with picture from the front cam-
era
Information in the Digital Operator's
Manual
In the Digital Operator's Manual you will find
information on the following topics:
RDisplays in the COMAND/Audio 20 display
RWide-angle function
RObject detection
Exiting 360° camera display mode
The 360° camera display is stopped
Rwhen you select transmission position P, or
Rwhen you are driving at moderate speeds
The previous display appears on the
COMAND/Audio 20 display. You can also
switch the display by selecting the &sym-
bol in the display and pressing 7the con-
troller to confirm.
ATTENTION ASSIST
General notes
ATTENTION ASSIST helps you during long,
monotonous journeys, such as on highways.
It is active in the 37 mph (60 km/h) to
125 mph (200 km/h) range. If ATTEN-
TION ASSIST detects typical indicators of fati-
gue or increasing lapses in concentration on
the part of the driver, it suggests taking a
break.
Important safety notes
ATTENTION ASSIST is only an aid to the
driver. It might not always recognize fatigue
or increasing inattentiveness in time or fail to
recognize them at all. The system is not a
substitute for a well-rested and attentive
driver.
The functionality of ATTENTION ASSIST is
restricted and warnings may be delayed or
not occur at all:
Rif the length of the journey is less than
approximately 30 minutes
Rif the road condition is poor, e.g. if the sur- face is uneven or if there are potholes
Rif there is a strong side wind
Rif you have adopted a sporty driving style
with high cornering speeds or high rates of
acceleration
Rif you are predominantly driving at a speed
below 37 mph (60 km/h) or above 124 mph
(200 km/h)
Rif you are driving with the DISTRONIC PLUS
Steering Assist activated
Rif the time has been set incorrectly
Rin active driving situations, such as when
you change lanes or change your speed
ATTENTION ASSIST is reset when you con-
tinue your journey and starts assessing your
tiredness again if:
Ryou switch off the engine
Ryou take off your seat belt and open the
driver's door, e.g. for a change of drivers or
to take a break
Displaying the attention level
Driving systems175
Driving an d parking
Z
Due to the nature of the system:
Rwarnings may be issued in error when driv-ing close to crash barriers or similar solid
lane borders.
Rthe warning is canceled when driving for an
extended period next to long vehicles, such
as trucks.
The two radar sensors for Blind Spot Assist
are integrated into the sides of the rear
bumper. Make sure that the bumper is free of
dirt, ice or slush in the vicinity of the sensors.
The sensors must not be covered, for exam-
ple by cycle racks or overhanging loads. Fol-
lowing a severe impact or in the event of dam-
age to the bumpers, have the function of the
sensors checked at a qualified specialist
workshop. Blind Spot Assist may otherwise
not work properly.
Indicator and warning display
:Indicator lamp (yellow)
Warning lamp (red)
Blind Spot Assist is not active at speeds below
approximately 20 mph (30 km/h). Vehicles in the monitoring range are then not indicated.
When Blind Spot Assist is activated, indicator
lamp :in the exterior mirrors lights up yel-
low at speeds of up to 20 mph (30 km/h). At
speeds above 20 mph (30 km/h), the indica-
tor lamp goes out and Blind Spot Assist is
operational.
If a vehicle is detected within the blind spot
monitoring range at speeds above 20 mph
(30 km/h), warning lamp :on the corre-
sponding side lights up red. This warning is always emitted when a vehicle enters the
blind spot monitoring range from behind or
from the side. When you overtake a vehicle,
the warning only occurs if the difference in
speed is less than 7 mph (12 km/h).
The yellow indicator lamp goes out if reverse
gear is engaged. In this event, Blind Spot
Assist is no longer active.
The brightness of the indicator or warning
lamps is adjusted automatically according to
the ambient light.
Information in the Digital Operator's Man-
ual
In the Digital Operator's Manual you can find
information about:
RCollision warning
RSwitching on Blind Spot Assist
Lane Keeping Assist
General notes
Lane Keeping Assist monitors the area in
front of your vehicle with camera :, which is
mounted at the top of the windshield. Active
Lane Keeping Assist detects lane markings on
the road and can warn you before you leave
your lane unintentionally.
This function is available in the range between
40 mph and 120 mph (60 km/h and
200 km/h).
A warning may be given if a front wheel
passes over a lane marking. It will warn you by means of intermittent vibration in the steer-
ing wheel for up to 1.5 second s.
Drivingsystem s179
Drivin g and parking
Z