
Deactivating variable SPEEDTRONIC
There are severalways to deactivat evariable
SPEEDTRONIC:
XBriefly press th ecruise contro llever forwards
B.
or
XBriefly press th ecruise contro llever in th e
direction of arrow A.
LI M indicator lamp ;in th ecruise contro l
lever goe sout .Variable SPEEDTRONIC is
deactivated.
Cruise contro lis selected.
It is no tpossible to deactivat evariable SPEED-
TRONIC by braking .
If you depress th eaccelerator peda lbeyond th e
pressure poin t(kickdown), variable SPEED-
TRONIC is automatically deactivated .but only if
your curren tspeed doe sno tdiffe rby more than
12 mph from th estored speed. You will hear a
warnin gtone if this is th ecase.
DISTRONI CPLUS
Important safet ynotes
GWARNING
DISTRONIC PLU Sdoe sno treact to :
Rpeople or animals
Rstationary obstacles on th eroad, e.g. stop-
ped or parke dvehicles
Roncomin gand crossin gtraffic
As aresult ,DISTRONIC PLU Smay neither giv e
warnings no rinterven ein suc hsituations.
There is aris kof an accident.
Always pay careful attention to th etraffic sit -
uation and be ready to brake .
GWARNING
DISTRONIC PLU Scanno talways clearly iden -
tify other road user sand complex traffic sit -
uations.
In suc hcases, DISTRONIC PLU Smay:
Rgiv ean unnecessary warnin gand then
brake th evehicle
Rneither giv e awarnin gno rinterven e
Raccelerat eor brake unexpectedly
There is aris kof an accident.
Continue to drive carefully and be ready to
brake ,in particular when warned to do so by
DISTRONIC PLUS.
GWARNING
DISTRONIC PLU Sbrake syour vehicle wit hup
to 40 %of th emaximum braking force. If this
braking forc eis insufficient, DISTRONIC PLU S
warn syou visually and audibly. There is aris k
of an accident.
In suc hcases, apply th ebrake syoursel fand
tr y to take evasiv eaction .
GWARNING
If you cal lup th estored speed and it differs
from th ecurren tspeed, th evehicle acceler -
ates or decelerates. If you do no tknow th e
stored speed, th evehicle could accelerat eor
brake unexpectedly. There is aris kof an acci-
dent.
Pay attention to th eroad and traffic condi-
tion sbefor ecallin gup th estored speed. If you
do no tknow th estored speed, stor eth e
desire dspeed again .
If you fail to adapt your drivin gstyle, DISTRONIC
PLU Scan neither reduce th eris kof acciden tno r
override th elaws of physics. DISTRONIC PLU S
canno ttake accoun tof road, weather and traffic
conditions. DISTRONIC PLU Sis only an aid. You
are responsible fo rth edistanc eto th evehicle in
front, fo rvehicle speed, fo rbraking in goo dtime
and fo rstayin gin your lane. Only engage
DISTRONIC PLU Swhen th ecurren troad,
weather and traffic condition spermit it to be
don esafely, and adapt your drivin gstyle accord-
Driving systems14 7
Driving an d parking
Z 

ingly. Drive carefully and maintain a suitable dis-
tance to the vehicle in front.
When DISTRONIC PLUS detects a risk of colli-
sion with the vehicle in front but is unable to
sufficiently decelerate the vehicle in order to
maintain the set distance from the vehicle in
front, you will be warned visually and acousti-
cally. DISTRONIC PLUS cannot prevent a colli-
sion without your intervention. An intermittent
warning tone will then sound and the distance
warning lamp will light up in the instrument clus-
ter. Brake immediately in order to increase the
distance from the vehicle in front, or take eva-
sive action, provided it is safe to do so.
DISTRONIC PLUS may not detect narrow vehi-
cles driving in front, e.g. motorcycles, or vehi-
cles driving on a different line. Therefore, always
pay attention to traffic conditions even when
DISTRONIC PLUS is activated. Otherwise, you
may fail to recognize dangers in time, cause an
accident and injure yourself and others.
In particular, the detection of obstacles can be
impaired if:
Rthe sensor is dirty or covered
Rthere is snow or heavy rain
Rthere is interference by other radar sources
Rthere is the possibility of strong radar reflec-
tions, for example, in parking garages.
If DISTRONIC PLUS is activated, the vehicle
brakes automatically in certain situations. This
can happen unexpectedly, especially when tow-
ing or in a car wash. There is a risk of an acci-
dent. In these or similar situations, deactivate
DISTRONIC PLUS.
If you want DISTRONIC PLUS to assist you, the
following activation condit
ions must be fulfilled
(Ypage 149) and the radar sensor system must
be operational.
General notes
DISTRONIC PLUS regulates the speed and auto- matically helps you maintain the distance to the
vehicle detected in front. DISTRONIC PLUS
brakes automatically so that the set speed is not
exceeded.
On long and steep downhill gradients, especially
if the vehicle is laden or towing a trailer, you
must select shift range 1,2or 3in good time. By
doing so, you will make use of the braking effect
of the engine. This relieves the load on the brake
system and prevents the brakes from overheat-
ing and wearing too quickly. If DISTRONIC PLUS detects a slower-moving
vehicle in front, your vehicle is braked in order to
maintain the preset distance to the vehicle in
front.
If there is no vehicle in front, DISTRONIC PLUS
operates in the same way as cruise control in the
speed range between 20 mph (Canada:
30 km/h) and 120 mph (Canada: 200 km/h). If
a vehicle is driving in front of you, it operates in
the speed range between 0 mph (0 km/h) and
120 mph (Canada: 200 km/h).
Do not use DISTRONIC PLUS while driving on
roads with steep gradients.
As DISTRONIC PLUS transmits radar waves, it
can resemble the radar detectors of the respon-
sible authorities. You can refer to the relevant
chapter in the Operator's Manual if questions
are asked about this.
iUSA only:
This device has been approved by the FCC as
a "Vehicular Radar System". The radar sensor
is intended for use in an automotive radar
system only. Removing, tampering with, or
altering the device will void any warranties,
and is not permitted by the FCC. Do not tam-
per with, alter, or use in an
y non-approved
way.
Any unauthorized modification to this device
could void the user’s authority to operate the
equipment.
iCanada only: This device complies with
RSS-210 of Industry Canada. Operation is
subject to the following two conditions:
1. This device may not cause harmful inter-
ference, and
2. This device must accept any interference
received, including interference that may
cause undesired operation of the device.
Removal, tampering, or altering of the device
will void any warranties, and is not permitted.
Do not tamper with, alter, or use in any non-
approved way.
Any unauthorized modification to this device
could void the user's authority to operate the equipment.
148Driving systems
Driving and parking 

Cruise control lever
:To activate or increase speed
;To set the specified minimum distance
=LIM indicator lamp
?To activate at the current speed/last storedspeed
ATo activate or reduce speed
BTo switch between DISTRONIC PLUS and
variable SPEEDTRONIC
CTo deactivate DISTRONIC PLUS
With the cruise control lever, you can operate
DISTRONIC PLUS and variable SPEEDTRONIC.
XTo switch between variable SPEED-
TRONIC and DISTRONIC PLUS: press the
cruise control lever in the direction of arrow
B.
LIM indicator lamp =on the cruise control lever
indicates which function you have selected:
RLIM indicator lamp =off:DISTRONIC PLUS
is selected.
RLIM indicator lamp =on:variable SPEED-
TRONIC is selected.
Activating DISTRONIC PLUS
Activation conditions
In order to activate DISTRONIC PLUS, the fol-
lowing conditions must be fulfilled:
Rthe engine must be started. It may take up to
two minutes after pulling away before
DISTRONIC PLUS is operational.
Rthe parking brake must be released.
Rthe differential lock must be disengaged.
RESP®must be active, but not intervening.
Rthe transmission must be in position D.
Rthe driver's door must be closed when you
shift fromPto Dor your seat belt must be
fastened.
Rthe front-passenger door and rear doors must
be closed.
Rthe vehicle must not skid.
Rthe DISTRONIC PLUS function must be selec-
ted (Ypage 149).
Rthe transfer case must be in the HIGH RANGE
transmission position.
Rthe vehicle must not be on an uphill or down-
hill gradient of more than 22‑25%.
Rthe radar sensor must be free from dirt
(Ypage 244).
Activating while driving
When driving at speeds below 20 mph
(30 km/h), you can activate DISTRONIC PLUS if
the vehicle in front has been detected and is
shown in the multifunction display. If the vehicle
in front is no longer detected and displayed,
DISTRONIC PLUS switches off and a tone
sounds.
XBriefly pull the cruise control lever towards
you ?, or press it up :or down A.
DISTRONIC PLUS is selected.
XPress the cruise control lever up :or down
A repeatedly until the desired speed is set.
XRemove your foot from the accelerator pedal.
Your vehicle adapts its speed to that of the
vehicle in front, but only up to the desired
stored speed.
iIf you do not fully release the accelerator
pedal, the DISTRONIC PLUS Passivemes-
sage appears in the multifunction display. The
set distance to a slower-moving vehicle in
front will then not be maintained. You will be
driving at the speed you determine by the
position of the accelerator pedal.
Driving systems149
Driving and parking
Z 

XTo increase:turn control=in direction ;.
DISTRONIC PLUS then maintains a greater
distance between your vehicle and the vehicle
in front.
XTo decrease: turn control=in direction :.
DISTRONIC PLUS then maintains a shorter
distance between your vehicle and the vehicle
in front.
iMake sure that you maintain the minimum
distance to the vehicle in front as required by
law. Adjust the distance to the vehicle in front
if necessary.
Deactivating DISTRONIC PLUS
There are several ways to deactivate
DISTRONIC PLUS:
XBriefly press the cruise control lever for-
wards :.
or
XBrake, unless the vehicle is stationary
or
XBriefly press the cruise control lever in the
direction of arrow =.
Variable SPEEDTRONIC is selected. LIM indi-
cator lamp ;in the cruise control lever lights
up.
When you deactivate DISTRONIC PLUS, you will
see the DISTRONIC PLUS Off
message in the
multifunction display for approximately five sec-
onds.
iThe last speed stored remains stored until
you switch off the engine. DISTRONIC PLUS is automatically deactivated
if:
Ryou engage the parking brake
Ryou are driving slower than 15 mph (25 km/h)
and there is no vehicle in front, or if the vehicle
in front is no longer detected
RESP®intervenes or you deactivate ESP®
Rthe transmission is in the
P,Ror Nposition
Ryou pull the cruise control lever towards you
in order to pull away and the front-passenger
door or one of the rear doors is open
Rthe vehicle has skidded
If DISTRONIC PLUS is deactivated, you will hear
a warning tone. You will see the DISTRONIC
PLUS Offmessage in the multifunction display
for approximately five seconds.
In the Assistance menu (
Ypage 178) of the on-
board computer, you can select the distance
display.
Tips for driving with DISTRONIC PLUS
General notes
The following contains descriptions of certain
road and traffic conditions in which you must be particularly attentive. In such situations, brake if
necessary. DISTRONIC PLUS is then deactiva-
ted.
Cornering, going into and coming out of a
bend
The ability of DISTRONIC PLUS to detect vehi-
cles when cornering is limited. Your vehicle may
brake unexpectedly or late.
Driving systems153
Driving an d parking
Z 

As a result, Blind Spot Assist may not give
warnings in such situations. There is a risk of
an accident.
Always observe the traffic conditions care-
fully, and maintain a safe lateral distance.
Blind Spot Assist is only an aid. It may fail to
detect some vehicles and is no substitute for
attentive driving.
In particular, the detection of obstacles can be
impaired if:
Rthere is dirt on the sensors or anything else
covering the sensors
Rvisibility is poor, e.g. due to fog, heavy rain or
snow
Rthere is a narrow vehicle traveling in front, e.g.
a motorcycle or bicycle
Rthe road has very wide lanes
Rthe road has narrow lanes
Ryou are not driving in the middle of the lane
Rthere are barriers or other road boundaries
iUSA only:
This device has been approved by the FCC as
a "Vehicular Radar System". The radar sensor
is intended for use in an automotive radar
system only. Removing, tampering with, or
altering the device will void any warranties,
and is not permitted by the FCC. Do not tam-
per with, alter, or use in any non-approved
way.
Any unauthorized modification to this device
could void the user’s authority to operate the
equipment.
General notes
Blind Spot Assist uses a radar sensor system to
monitor both the left and right sides of your
vehicle. It supports you from a speed of approx-
imately 20 mph (30 km/h). A warning display in
the exterior mirrors draws your attention to
vehicles detected in the monitored area. If you
then switch on the corresponding turn signal to change lanes, you will also receive a visual and
audible collision warning. For this purpose, Blind
Spot Assist uses sensors in the rear bumper.
Monitoring range of the sensors
Blind Spot Assist monitors the area up to 10 ft
(3 m) behind your vehicle and directly next to
your vehicle, as shown in the diagram.
If the lanes are narrow, vehicles driving in the
lane beyond the lane next to your vehicle may be
indicated, especially if the vehicles are not driv-
ing in the middle of their lane. This may be the
case if the vehicles are driving on the inner side
of their lane.
Due to the nature of the system:
Rwarnings may be issued in error when driving
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 sensors for Blind Spot Assist are inte-
grated 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 radar sensors
must not be covered, for example by rear bicycle
racks or overhanging loads. Following a severe
impact or in the event of damage to the bump-
ers, have the function of the radar sensors
checked at a qualified specialist workshop.
Blind Spot Assist may otherwise not work prop-
erly.
Driving systems155
Driving an d parking
Z 

Indicator and warning display
GWARNING
Blind Spot Assist does no treac tto :
Rvehicles overtake nto oclosely on th eside ,
placing them in th eblin dspo tarea
Rvehicles bein govertake nat aspee ddiffer -
ence of mor ethan 7. 5mph (12 km/h)
Rvehicles whic happroac hwit h a larg espee d
differential and overtake your vehicl e
As aresult ,Blind Spot Assist may no tgiv e
warning sin suc hsituations. Ther eis aris kof
an accident.
Always observ eth etraffic condition scare-
fully, and maintai n asafelateral distance.
:Yello windicator lamp/red warning lamp
When Blind Spot Assist is activated, indicator
lamp :in th eexterio rmirror slights up yellow
at speeds of up to 20 mph (30 km/h). At speeds
above 20 mph (30 km/h), the indicator lamp
goes out and Blind Spot Assist is operational.
If a vehicle is detected within the monitoring
range of Blind Spot Assist at speeds above
20 mph (30 km/h), warning lamp :on the cor-
responding side lights up red. This warning
occurs when a vehicle enters the blind spot
monitoring range from behind or from the side.
When you overtake a vehicle, the warning only
occurs as long as 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/warning lamps
is adjusted automatically according to the ambi- ent light.
Collision warning
:Yellow indicator lamp/red warning lamp
If a vehicle is detected in the monitoring range of
Blind Spot Assist and you switch on the corre-
sponding turn signal, a double warning tone
sounds. Red warning lamp :flashes. If the turn
signal remains on, vehicles detected are indica- ted by the flashing of red warning lamp :.
There are no further warning tones.
Switching on Blind Spot Assist
:Yellow indicator lamp/red warning lamp
XMake sure that Blind Spot Assist is activated
in the on-board computer (Ypage 178).
XTurn the SmartKey to position 2in the ignition
lock (Ypage 112).
Warning lamps :in the exterior mirrors light
up red for approximately 1.5 seconds and
then turn yellow.
156Driving systems
Driving and parking 

HOLD function
General notes
The HOLD function can assist the driver in the
following situations:
Rwhen pulling away, especially on steep slopes
Rwhen maneuvering on steep slopes
Rwhen waiting in traffic
The vehicle is kept stationary without the driver having to depress the brake pedal.
The braking effect is canceled and the HOLD
function deactivated when you depress the
accelerator pedal to pull away.
iDo not use the HOLD function when driving
off-road, on steep uphill or downhill gradients
or on slippery or loose surfaces. The HOLD
function cannot hold the vehicle on such sur-
faces.
Activation conditions
You can activate the HOLD function if:
Rthe vehicle is stationary
Rthe engine is running or if it has been auto-
matically switched off by the ECO start/stop
function
Rthe engine is running
Rthe driver's door is closed or your seat belt is
fastened
Rthe transmission is in position D,R or N
RDISTRONIC PLUS is deactivated
Activating the HOLD function
The vehicle's brakes are applied when the HOLD
function is activated. For this reason, deactivate
the HOLD function while in the car wash or while
towing.
XMake sure that the activation conditions are
met.
XDepress the brake pedal.
XQuickly depress the brake pedal further until
ë appears in the multifunction display.
The HOLD function is activated. You can
release the brake pedal.
iIf depressing the brake pedal the first time
does not activate the HOLD function, wait
briefly and then try again.
Deactivating the HOLD function
GWARNING
When leaving the vehicle, it can still roll away despite being braked by the HOLD function if:
Rthere is a malfunction in the system or in
the voltage supply.
Rthe HOLD function has been deactivated by
pressing the accelerator pedal or the brake
pedal, e.g. by a vehicle occupant.
Rthe electrical system in the engine com-
partment, the battery or the fuses have
been tampered with.
Rthe battery is disconnected
There is a risk of an accident.
If you wish to exit the vehicle, always turn off the HOLD function and secure the vehicle
against rolling away.
The HOLD function is deactivated automatically if:
Ryou accelerate and the transmission is in
position Dor R.
Ryou shift the transmission to position P.
Ryou depress the brake pedal again with a cer-
tain amount of pressure untilëdisap-
pears from the multifunction display.
Ryou activate DISTRONIC PLUS.
On steep uphill or downhill gradients or if there
is a malfunction, the transmission may also be
automatically shifted into position P.
Permanent all-wheel drive
!
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 vehi-
cle with all wheels in full contact with the
ground.
!When testing the parking brake, operate the
vehicle only briefly (for a maximum of ten sec-
onds) on a brake test dynamometer. When
doing this, turn the SmartKey to position 0or
1 in the ignition. Failure to do this can cause
damage to the drive train or the brake system.
Driving systems157
Driving and parking
Z 

!A function or performance test should only
be carried out on a two-axle dynamometer.
Before you operate the vehicle on such a
dynamometer, please consult a qualified
workshop. You could otherwise damage the
drive train or the brake system.
The all-wheel drive system ensures that all four
wheels are permanently driven. The all-wheel
drive system improves vehicle traction together
with ESP
®and 4ETS if a drive wheel spins due to
insufficient grip.
If a drive wheel spins due to insufficient grip:
ROnly depress the accelerator pedal as far as
necessary when pulling away.
RTake your foot off the accelerator, slowly,
while the vehicle is in motion.
The permanent all-wheel drive system can nei-
ther reduce the risk of accident nor override the
laws of physics if you fail to adapt your driving
style or if you are inattentive. The all-wheel drive
system cannot take into account road, weather
or traffic conditions. The all-wheel drive system
is only an aid. You are responsible for maintain-
ing a safe distance to the vehicle in front, for
vehicle speed, for braking in good time and for
staying in lane.
In wintry driving conditions, always use winter
tires (M+S tires) and if necessary, snow chains
(
Ypage 264). Only in this way can the maximum
effect of all-wheel drive be achieved.
For information on driving off-road, see
(
Ypage 137).
PARKTRONIC
Important safety notes
!When parking, pay particular attention to
objects above or below the sensors, such as
flower pots or trailer drawbars. PARKTRONIC
does not detect such objects when they are in the immediate vicinity of the vehicle. You
could damage the vehicle or the objects.
The sensors may not detect snow and other
objects that absorb ultrasonic waves.
Ultrasonic sources such as an automatic car
wash, the compressed-air brakes on a truck
or a pneumatic drill could cause PARKTRONIC
to malfunction.
PARKTRONIC may not function correctly on
uneven terrain. PARKTRONIC is an electronic parking aid with
ultrasonic sensors. It indicates visually and audi-
bly 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 sur-
roundings. You are always responsible for safe
maneuvering, parking and exiting a parking
space. Ensure that the areas in front, behind and
to the side of the vehicle are safe before maneu-
vering, parking or pulling away. There must not
be any persons, animals or objects in the area in
which you are maneuvering.
PARKTRONIC does not take into account any
persons or objects located below or above the
detection range. As a result, PARKTRONIC can-
not warn you about objects in this area.
PARKTRONIC is activated automatically when
you:
Rswitch on the ignition
Rshift the transmission to position D,Ror N
Rrelease the parking brake
PARKTRONIC is deactivated at speeds above
11 mph (18 km/h). It is reactivated at lower
speeds.
PARKTRONIC monitors the area around your
vehicle using six sensors in the front bumper
and four sensors in the rear bumper.
Range of the sensors
General notes
:Example: sensors in the front bumper, right-
hand side
158Driving systems
Driving and parking