Lane Keeping Assist does not keep your vehicle
in its lane.
The system may be impaired or may not function
if:
Rif the vehicle is incorrectly loaded
(Ypage 212)
Rthere is poor visibility, e.g. due to insufficient
illumination of the road, or due to snow, rain,
fog or spray
Rthere is glare, e.g. from oncoming traffic, the
sun or reflection from other vehicles (e.g. if
the road surface is wet)
Rthe windshield is dirty, fogged up, damaged or
covered, for instance by a sticker, in the vicin-
ity of the camera
Rno, or several, unclear lane markings are pres-
ent for one lane, e.g. in a construction area
Rthe lane markings are worn away, dark or cov-
ered up, e.g. by dirt or snow
Rthe distance to the vehicle in front is too small
and the lane markings thus cannot be detec-
ted
Rthe lane markings change quickly, e.g. lanes
branch off, cross one another or merge
Rthe road is narrow and winding
Rthere are highly variable shade conditions on
the road
A warning may be given if a front wheel passes
over a lane marking. In addition, a warning tone
sounds and the Ãindicator lamp in the
instrument cluster flashes red.
Activating/deactivating Lane Keeping
Assist
Lane Keeping Assist is automatically activated
when you start the engine.
XTo deactivate: press thejbutton in the
center console (Ypage 35).
On vehicles without steering wheel but-
tons:
OFF
flashes briefly in the display and the Ã
indicator lamp in the instrument cluster
flashes yellow and then lights up continu-
ously.
On vehicles with steering wheel buttons:
The Lane
Keep.AssistDeactivatedmes-
sage appears in the display and the Ã
indicator lamp in the instrument cluster
flashes yellow and then lights up continu-
ously. Lane Keeping Assist is deactivated.
XTo activate:
press thejbutton in the
center console again (Ypage 35).
On vehicles without steering wheel but-
tons:
on
flashes briefly in the display and the Ã
indicator lamp in the instrument cluster goes
out. If a lane marking is detected, the Ã
indicator lamp lights up green.
On vehicles with steering wheel buttons:
The Lane Keep. Assist Activated
mes-
sage appears in the display and the Ã
indicator lamp in the instrument cluster goes
out. If a lane marking is detected, the Ã
indicator lamp lights up green.
Lane Keeping Assist is activated.
A Lane Keeping Assist warning is suppressed if:
Ra driving safety system intervenes, such as
ABS, BAS or ESP®.
Ryou have set the turn signal and a lane change is detected. In this case, the warnings are
suppressed for a certain period of time.
Ryou accelerate hard, e.g. kickdown on vehi-
cles with an automatic transmission.
Ryou brake hard.
Ryou steer actively, e.g. swerve to avoid an
obstacle or change lane quickly.
Ryou cut the corner on a sharp bend.
In order that you are warned only when neces-
sary and in good time if you cross the lane mark-
ing, the system recognizes certain conditions
and warns you accordingly.
Lane Keeping Assist warns you earlier if:
Ryou approach the outer lane marking on a
bend.
Rthe road has very wide lanes, e.g. a freeway.
Rthe system recognizes solid lane markings.
Warnings are given later if:
Rthe road has narrow lanes.
Ryou cut the corner on a bend.
All-wheel drive
Important safety notes
!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
Driving systems147
Driving and parking
Z
Clean the sensors regularly, taking care not to
scratch or damage them (Ypage 236).
Front sensors
CenterApprox. 39 in
(100 cm)
CornersApprox. 26 in(65 cm)
Rear sensors
CenterApprox. 71 in
(180 cm)
CornersApprox. 39 in
(100 cm)
Mini mum distance
CenterApprox. 12 in(30 cm)
Front corner sensorsApprox. 10 in(25 cm)
Rear corner sensorsApprox. 12 in(30 cm)
Ifan obstacle iswithin th isrange, all segments
of the warning displays light up and you hear a
warning tone. Ifthe distance between the veh i-
cle and the obstacle falls below the minimum
range, it ispossible that thedistance may no
longer be displ ayed.
Warning displays
Warning display, fron tarea
Warning display for th eleft-hand rear area in th e
left-hand exterio rmirror
:
Warning segments for the left front area
;Warning segments for the right front area
=Operational readiness symbol for the front
area
?Warning display segments
AOperational readiness symbol for the rear
area
The warning displays show the distance
between the sensor and the obstacle.
The warning display is divided into five yellow
and two red segments for each side of the vehi- cle. PARKTRONIC is operational if yellow indi-
cator segments =and Aare lit.
There is a malfunction ifonly the red segments
of the warning display light up .
The position of the gear lever determines
whether the front and/or rear area is monitored.
152Driving systems
Driving and parking
Selector lever posi-
tionMonitoring
DFront area
Ror NFront and rear area
PNo areas activated
One or more segments light up as the vehicle
approaches an obstacle, depending on the vehi-
cle's distance from the obstacle.
From the:
Rsixth segment, an intermittent warning tone
sounds for approximately 2 seconds.
Rseventh segment, a continuous warning tone
sounds. This indicates that you have now
reached the minimum distance.
Roll-back warning
PARKTRONIC automatically monitors the area
behind the vehicle if the vehicle begins to roll
backwards without reverse gear engaged, e.g.
after stopping on an uphill gradient.
If PARKTRONIC recognizes an obstacle at a dis-
tance of at most 31 in (80 cm), all the segments
in the warning displays light up. A continuous
warning tone also sounds as the vehicle
approaches the obstacle and for a further
2 seconds after the vehicle has come to a halt.
Activating/deactivating PARKTRONIC
XPress the fbutton.
If PARKTRONIC is deactivated, the indicator
lamp in the switch lights up.
Towing a trailer
PARKTRONIC detects a coupled trailer if your
vehicle is equipped with the corresponding elec-
trical installations for trailer towing.
PARKTRONIC is deactivated for the rear area
when you establish an electrical connection
between your vehicle and a trailer. If you use an
adapter for the socket, remove it from the
socket after detaching the trailer. Otherwise,
PARKTRONIC remains deactivated for the rear
area.
Remove a detachable trailer coupling if it is no
longer required. PARKTRONIC measures the
minimum detection range to an obstacle from
the bumper, not the ball coupling.
Driving systems153
Driving and parking
Z
Problems with PARKTRONIC
ProblemPossible causes/consequences andMSolutions
Only the red segments in
the PARKTRONIC warn-
ing displays are lit.
A warning tone also
sounds for approx-
imately 2 seconds.
PARKTRONIC is deacti-
vated after approx-
imately 20 seconds.
The indicator lamp of the
f button lights up
and the red segments in
the PARKTRONIC warn-
ing display go out.PARKTRONIC has malfunctioned and has switched itself off.
XIf problems persist, have PARKTRONIC checked at a qualified spe- cialist workshop.
The PARKTRONIC warn-
ing displays implausible
distances.
For example, all the seg-
ments may be lit even
though there is no obsta-
cle present.The PARKTRONIC sensors are dirty or iced up.
XClean the PARKTRONIC sensors (Ypage 236).
XTurn the key to position 2again in the ignition lock.
The license plate or other parts attached near the sensors may not be
secured correctly.
XCheck the license plate and attachment parts near the sensors for
correct seating.
An external radio or ultrasonic source may be causing interference.
XCheck PARKTRONIC functions in a different location.
Rear view camera
Important safety notes
The rear view camera is only an aid. It cannot
replace your own awareness of the immediate
surroundings. You are responsible for safe
maneuvering, parking and pulling away. When
maneuvering, parking and pulling away, make
sure that there are no persons, animals or
objects in the maneuvering area.
The rear view camera is a visual parking aid.
Information on operation can be found in the
separate Audio 15 supplement.
The camera is in the middle of the roof above the
high-mounted brake lamp (
Ypage 236).
You can find information on cleaning the camera
in the "Maintenance and care" section
(
Ypage 236).
Working mode
ADR (working speed governor)
General notes
When activated, ADR automatically increases
the engine speed to a preset speed or a speed
you have set.
iAfter a cold start, the idling speed of the
engine is increased automatically. If the pre-
set working speed is lower than the increased idling speed, the working speed is only
reached once the engine has completed the
warm-up phase.
It is only possible to activate ADR with the
vehicle stationary and the parking brake
applied.
The selector lever of the automatic transmis-
sion must be in position P.
154Working mode
Driving and parking
Switching ADR on and off
XTo activate:press upper section :of the
E switch while the engine is running.
The indicator lamp in the switch comes on.
The K indicator lamp in the instrument
cluster lights up or the display shows the fol-
lowing message: Operating speed gover‐
nor active.
XTo deactivate:press lower section ;of the
E switch while the engine is running.
The indicator lamp in the switch goes out.
ADR is automatically deactivated if:
Ryou release the parking brake.
Rthe brake pedal is depressed.
Rthe vehicle moves.
Rthe control unit detects a malfunction.
Setting the working speed
XActivate ADR.
XTo increase: press theEbutton.
XTo decrease: press theFbutton.
Towing a trailer
Notes on trailer towing
Important safety notes
GWARNING
Installing an unsuitable ball coupling may
result in overloading of the trailer tow hitch
and the rear axle. This applies especially if the ball coupling in question is longer or angled
differently. This could seriously impair the
driving characteristics and the trailer can
come loose. There is a risk of an accident.
You should only ever install a ball coupling
that has the permissible dimensions and that
is designed to meet your trailer-towing
requirements. Do not modify the ball coupling
or the trailer tow hitch.
GWARNING
If you use a ball coupling that is not approved
for your vehicle, it may cause excessive strain
on the trailer tow hitch. This can cause dam-
age to the vehicle and the trailer may come
loose during the journey. The handling may be
impaired and the rear axle may be overloaded.
This may lead to an accident involving serious
or even fatal injury.
Therefore note the following:
ROnly install a ball coupling that is approved for your vehicle.
RBefore the journey, make sure that the ballcoupling is correctly installed and secured.
To do this, observe the operating instruc-
tions of the ball coupling manufacturer.
RDo not make any modifications to the ball
coupling or the trailer tow hitch.
You must observe the operating instructions
of the trailer tow hitch or ball coupling manu-
facturer.
GWARNING
If the ball coupling is not correctly installed
and secured, it could come loose while driving and endanger other road users. There is a risk
of an accident and injury.
Towing a trailer155
Driving and parking
Z
Useful information
This Operator's Manual describes all models as
well as standard and optional equipment of your
vehicle that were available at the time of going
to print. Country-specific variations are possi-
ble. Note that your vehicle may not be equipped
with all of the described functions. This also
applies to systems and functions relevant to
safety.
Read the information on qualified specialist
workshops (
Ypage 26).
Important safety notes
GWARNING
If you are driving and reach through the steer- ing wheel to operate the adjustment knob,
you could lose control of the vehicle. There is
a risk of an accident and injury.
Only operate the adjustment knobs when thevehicle is stationary. Do not reach through the
steering wheel when driving.
GWARNING
If you operate information systems and com-
munication equipment integrated in the vehi-
cle while driving, you will be distracted from
traffic conditions. You could also lose control
of the vehicle. There is a risk of an accident.
Only operate the equipment when the traffic
situation permits. If you are not sure that this
is possible, park the vehicle paying attention
to traffic conditions and operate the equip-
ment when the vehicle is stationary.
GWARNING
If the instrument cluster has failed or mal-
functioned, you may not recognize function
restrictions in systems relevant to safety. The
operating safety of your vehicle may be
impaired. There is a risk of an accident.
Drive on carefully. Have the vehicle checked
at a qualified specialist workshop immedi-
ately. You must observe the legal requirements for the
country in which you are currently driving when
operating the on-board computer.
The on-board computer display only shows mes-
sages and warnings from certain systems. You
should therefore make sure your vehicle is oper-
ating safely at all times. If the operating safety of
your vehicle is impaired, stop the vehicle as
soon as possible, paying attention to road and
traffic conditions. Then consult a qualified spe-
cialist workshop.
Instrument cluster
Overview
:Instrument cluster on vehicles without
steering wheel buttons
;Instrument cluster in vehicles with steering-
wheel buttons
=Adjustment buttons fand g
?Reset button 9
AService button Ë(engine oil level check)
BMenu button 4
You will find a full overview of the instrument
cluster in the "At a glance" section (
Ypage 32).
The display in the instrument cluster is activated when you:
Ropen the driver's door
Rturn the key to position 2in the ignition lock
Rpress the 9reset button
Rswitch on the lights
Instrument cluster161
On-board computer and displays
Z
The display switches off automatically after
approximately 30 seconds if:
Rthe key is in position0in the ignition lock.
Rthe vehicle lighting is not switched on.
Instrument lighting
When the lights are switched on, you can adjust
the brightness of the instrument cluster lighting
using the fand gbuttons.
XTo brighten: press thefbutton.
XTo dim: press the gbutton.
iVehicles with automatic headlamp mode:
the instrument lighting also adapts to auto-
matic headlamp mode.
Tachometer
!
Do not drive in the overrevving range, as this
could damage the engine.
HEnvironmental note
Avoid driving at high engine speeds. This
unnecessarily increases the fuel consumption
of your vehicle and harms the environment as
a result of increased emissions.
The red band in the tachometer indicates the
engine's overrevving range.
To protect the engine, the fuel supply is inter-
rupted when the red band is reached.
Outside temperature
You should pay special attention to road condi-
tions when temperatures are around the freez-
ing point.
On vehicles without steering wheel buttons
(
Ypage 163) and on vehicles with steering
wheel buttons (Ypage 167), the outside tem-
perature display is in the display.
Changes in the outside temperature are dis-
played after a short delay.
Speedometer
The speed can also be shown in the display. You
can find information on the digital speedometer for vehicles without steering wheel buttons
under (
Ypage 163) and for vehicles with steer-
ing wheel buttons under (Ypage 167).
iIn some countries, a warning sounds when
the vehicle reaches the maximum speed limit,
e.g. at 75 mph (120 km/h).
Trip odometer
XTo reset: make sure that the display is show-
ing the trip odometer if you have a vehicle with
steering wheel buttons (
Ypage 167).
XPress and hold the 9reset button until the
trip odometer is reset to 0.0.
Fuel gage
:Fuel gage on vehicles without steering
wheel buttons
;Fuel gage on vehicles with steering wheel
buttons
=Fuel filler flap location indicator t: the
fuel filler flap is on the left-hand side. Fuel
filler flap location indicator u: the fuel
filler flap is on the right-hand side
?Reserve fuel warning lamp (Ypage 200)
DEF gage
Vehicles without steering wheel but-
tons
If the DEF supply is less than 1.5 US gal (5.5 l),
the dEF Chkmessage appears in the display.
In addition, the yellow åDEF indicator lamp
lights up in the instrument cluster and a warning
tone sounds.
162Instrument cluster
On-board computer and displays
If the supply of DEF falls below the reserve range
of 0.8 US gal (3.0l), the StArtS RExxmessage
appears in the display. In addition, the yellow
å DEF indicator lamp lights up in the instru-
ment cluster and three warning tones sound.
In the display, xx
corresponds to the number of
possible remaining engine starts (16to 0).
When the display shows that the number of
remaining starts is 0
, theStArtSIdLEmessage
appears in the display and three warning tones
sound.
In addition, the yellow åDEF indicator lamp
and the ;Check Engine indicator lamp light
up in the instrument cluster and three warning
tones sound.
The engine management only allows speeds of
up to 5 mph (8 km/h).
Add at least 1.5 US gal (5.5 l) of DEF
(
Ypage 129).
The display message only disappears when the
vehicle is stationary, at the latest after
20 seconds as soon as you switch on the ignition or start the engine after refueling.
Vehicles with steering wheel buttons
If the supply of DEF is less than 1.5 US gal
(5.5 l), the Check Diesel Exhaust Fluid
see Operator's Manualmessage appears in
the display.
If the supply of DEF falls below the reserve range
of 0.8 US gal (3.0 l), the XX
startsremainingmessage is displayed.
Three short warning tones also sound.
In the display,xx
corresponds to the number of
possible remaining engine starts (16to 0).
When the display shows that the number of
remaining starts is 0
, theStArtSIdLEmessage
appears in the display.
The yellow ;Check Engine indicator lamp
also lights up and three short warning tones
sound.
The engine management only allows speeds of
up to 5 mph (8 km/h).
Add at least 1.5 US gal (5.5 l) of DEF
(
Ypage 129).
The display message only disappears when the
vehicle is stationary, at the latest after
20 seconds as soon as you switch on the ignition or start the engine after refueling.
On-board computer (vehicles without
steering wheel buttons)
Operating the on-board computer
General notes
The on-board computer is activated as soon as
you turn the key to position 1in the ignition lock.
The on-board computer shows vehicle informa-
tion and settings in the display.
You can control the display and the settings in
the on-board computer using the adjustment
buttons on the instrument cluster.
Standard display
:Odometer
;Trip odometer
=Clock
?Outside temperature or digital speedometer
AFuel gage (Ypage 162)
BSelector lever position or current shift range
with automatic transmission (Ypage 124)
XTo call up the standard display: turn the key
to position 2in the ignition lock.
XPress the 4menu button for longer than
1 second.
The information shown in the display changes
from the outside temperature to the digital
speedometer.
Menus in the on-board computer
Overview
If you wish to exit a menu and go to the standard display:
XPress the 4menu button for longer than
1 second.
or
XDo not press any button for 10 seconds.
The display accepts the changed settings.
On-board computer (vehicles without steering wheel buttons)163
On-board computer and displays
Z