
Heating and air-conditioning system
Air-recirculation mode switches off automati-
cally after about 10 to 30 minutes, depending on
the outside temperature.
XSwitch on climate control (Ypage 101).
XTo activate/deactivate:press theebut-
ton.
If the indicator lamp in the ebutton lights
up, air-recirculation mode is activated.
Rear-compartment heating and rear-
compartment air-conditioning system
On vehicles with rear-compartment heating and
a rear-compartment air-conditioning system,
you can activate or deactivate air-recirculation
mode for the rear-compartment climate control.
XSwitch on climate control (Ypage 101).
XTo activate: set the temperature control of
rear-compartment heating =(Ypage 100) or
rear-compartment air conditioning system ;
(
Ypage 101) to the center position.
Only one of the two climate control systems in
the rear compartment is activated and is in
air-recirculation mode.
XTo deactivate: turn the temperature control
of rear-compartment heating =(Ypage 100)
or rear-compartment air-conditioning sys-
tem ;(
Ypage 101) clockwise or counter-
clockwise. Only change the temperature in
small increments.
Adjusting the air vents
Important safety notes
GWARNING
Very hot or very cold air can flow from the air
vents. This could result in burns or frostbite in
the immediate vicinity of the air vents. There
is a risk of injury.
Make sure that all vehicle occupants always
maintain a sufficient distance to the air out-
lets. If necessary, redirect the airflow to
another area of the vehicle interior.
The center and side air vents are adjustable. On vehicles with a rear-compartment air-condi-
tioning system, you can also adjust the air vents
in the roof duct.
iFor virtually draft-free ventilation, adjust the
sliders of the center air vents to the center
position.
In order to ensure the direct flow of fresh air
through the air vents into the vehicle interior,
please observe the following notes:
Rkeep the air inlet grille on the hood free of
blockages, such as ice, snow or leaves.
Rnever cover the vents or the ventilation grilles
in the vehicle interior.
Setting the center air vents
:Center air vent, left
;Center air vent, right
=Thumbwheel for center air vent, right
?Thumbwheel for center air vent, left
XTo open: turn thumbwheel =to the left or
thumbwheel ?to the right.
XTo close: turn thumbwheel =to the right or
thumbwheel ?to the left.
Adjusting the air vents105
Climate control
Z

ing time is synchronized. The indicator lamp in
they auxiliary heating button goes out.
Switching the heater booster function
on/off
Vehicles with auxiliary heating
Vehicles with heater booster function
At outside temperatures of up to 39 ‡(4 †) the
fuel-fired heater booster system heats the vehi-
cle interior as quickly as possible when the
engine is running.
The auxiliary heating automatically switches to
heater booster mode after the engine is started.
At an outside temperature above 39 ‡(4 †) the
auxiliary heating system and the heater booster
function switch off automatically.
If you switch off the engine without switching off
the heater booster function, the system will be
switched on the next time the engine is started (memory function).
iSwitch the auxiliary heating on or off with
the y button (Ypage 108).
XTo switch on/off: press the¢button.
If the indicator lamp in the button lights up,
the heater booster function is switched on. After switching off, the auxiliary heating oper-
ates for about another 2 minutes and then
switches off automatically.
Replacing the remote control battery
GWARNING
Batteries contain toxic and corrosive substan- ces. If batteries are swallowed, it can result in
severe health problems. There is a risk of fatalinjury.
Keep batteries out of the reach of children. If
a battery is swallowed, seek medical attention
immediately.
HEnvironmental note
Batteries contain dangerous
substances. It is against the
law to dispose of them with
the household rubbish. They
must be collected separately and recycled to protect the
environment.
Dispose of batteries in an
environmentally friendly
manner. Take discharged
batteries to a qualified spe-
cialist workshop or a special
collection point for used bat-
teries.
If the indicator lamp on the remote control
flashes red rapidly, the remote control battery is
discharged. You should replace the remote con-
trol battery.
You need a battery of the type CR2430, which
can be obtained at any qualified specialist work-
shop.
Operating the auxiliary heating system111
Climate control
Z

Rall the doors are closed.
Rall the vehicle occupants are wearing their
seat belts correctly.
Rthe parking brake is applied.
iIf you depress the brake pedal before start-
ing the engine, the pedal travel is short and
pedal resistance is high.
If you depress the brake pedal again after
starting the engine, pedal travel and resist-
ance will be back to normal again.
Gearshift pattern
j
Park position with parking lock
kReverse gear
iNeutral
hDrive
XMove the selector lever to position P.
The display in the instrument cluster shows P:
Ron vehicles with steering wheel buttons
(Ypage 167)
Ron vehicles without steering wheel buttons
(Ypage 163)
iYou can also start the engine in neutral N.
XTurn the key to position 2in the ignition lock.
The % preglow indicator lamp in the instru-
ment cluster lights up briefly.
XOnce the %preglow indicator lamp goes
out, turn the key to position 3in the ignition
lock and release it as soon as the engine is
running.
iYou can start the engine without preglow
when the engine is warm.
The preglow system is malfunctioning if the
% preglow indicator lamp lights up for
approximately 1 minute:
Rafter the ignition is switched on
Rwhile the engine is running At extremely low outside temperatures you
may then no longer be able to start the
engine. Have the malfunction rectified at a
qualified specialist workshop.
iDepending on the equipment installed, the
vehicle either automatically locks centrally
after switching on the ignition or after pulling
away. The locking knobs in the doors drop
down.
You can open the doors from the inside at any
time.
Automatic door locking c
an be deactivated
(Ypage 64).
Driving off
GWARNING
If the engine speed is above the idling speed
and you engage transmission position Dor R,
the vehicle could pull away suddenly. There is
a risk of an accident.
When engaging transmission position Dor R,
always firmly depress the brake pedal and do not simultaneously accelerate.
!Only shift into reverse gear Rwhen the vehi-
cle is stationary. Otherwise, you could dam-
age the transmission.
XDepress the brake pedal and keep it
depressed.
The selector lever lock is released.
XMove the selector lever to position Dor R.
On vehicles with a reverse warning feature,
when reverse gear is engaged a warning tone
sounds to alert other road users
(
Ypage 122).
XRelease the parking brake (Ypage 131).
The c indicator lamp in the instrument
cluster goes out.
XRelease the brake pedal.
XCarefully depress the accelerator pedal.
iAfter pulling away or switching on the igni-
tion, the vehicle automatically locks centrally.
The locking knobs in the doors drop down.
You can open the doors from the inside at any
time.
You can also deactivate the automatic locking
feature (
Ypage 64).
Driving121
Driving and parking
Z

Problems with the fuel and fuel tank
If your vehicle is losing fuel, the fuel lines or thefuel tank are defective.
XTurn the key immediately to position 0in the
ignition lock and remove it.
XDo not restart the engine under any circum-
stances.
XConsult a qualified specialist workshop.
If the fuel tank has been run dry, after refueling
carry out the following steps:
XBefore starting the engine: switch on the igni-
tion three or four times.
XTurn the key to position 2in the ignition lock
(Ypage 119).
The % preglow indicator lamp in the instru-
ment cluster lights up briefly.
XOnce the %preglow indicator lamp goes
out, turn the key to position 3in the ignition
lock and release it as soon as the engine is
running.
You can start the diesel engine without preglow
when the engine is warm.
Diesel Exhaust Fluid (DEF)
Important safety notes
!Only use DEF in accordance with
ISO 22241. Never mix DEF with additives or
thin it with tap water. The exhaust gas after-
treatment may otherwise be damaged.
Observe the MB Specifications for Service
Products, Sheet 352.0.
Damage that results from the use of additives
or tap water leads to the loss of the New
Vehicle Limited Warranty.
!If DEF comes into contact with a painted or
aluminum surface, wash the surface off
immediately with plenty of water.
!DEF is not a diesel additive and must not be
mixed with fuel in the tank. Even small
amounts of DEF can cause engine damage.
Damage that results from the blending of DEF
will not be covered by the New Vehicle Limi-
ted Warranty.
iIf the outside temperature is below 12 ‡
( Ò 11 †) it may be difficult to top up. If the DEF
is frozen and there is an active warning indi- cator, topping up may not be possible. Park
the vehicle in a warm place, e.g. in a garage,
until the DEF has become liquid again. Top-
ping up is then possible again. Alternatively,
have the DEF tank refilled at a qualified spe-
cialist workshop.
iIf you add DEF at temperatures below 12 ‡
( Ò 11 †) it is possible that the level is not
shown correctly due to the frozen DEF.
Drive for at least 20 minute s(heating phase in
the tank activated) and then st
op the vehicle
for at least 30 seconds. The level is then
shown correctly.
You will find further information on DEF in the
"Service products" section (
Ypage 277).
Refueling procedure
DEF filler neck
Non-lockable DEF filler cap
Example: DEF filler cap in the engine compartment
XTo open: switch off the ignition.
XOpen the hood (Ypage 218).
XTurn filler cap :counter-clockwise and
remove it.
XTo close: replace cap :on the filler neck and
turn it clockwise.
You will hear a click when cap :is fully
closed.
XClose the hood (Ypage 219).
Refueling129
Driving and parking
Z

Always park your vehicle safely and according to
legal requirements and secure it against rolling
away.
To ensure that the vehicle is properly secured
against rolling away unintentionally:
Rthe parking brake must be firmly applied
Rthe selector lever must be in positionPand
the key must be removed from the ignition
lock
Ron steep uphill or downhill gradients, the front
wheels must be turned towards the curb
Rthe rear axle must be secured, e.g. with a
wheel chock, on steep uphill or downhill gra-
dients
Use the wheel chock (
Ypage 132) to do so.
If you leave the vehicle parked for more than
three weeks:
Rconnect the batteries to a trickle charger or
Rdisconnect the vehicle's starter battery or
Rswitch off the electrical system using the bat-
tery main switch (Ypage 118) and
Rdisconnect the vehicle's auxiliary battery
Otherwise, you need to check the battery's con-
dition of charge every three weeks, since
standby power consumption can drain the bat-
tery. If the battery voltage is lower than 12.2 V,
the battery must be charged. Otherwise, the
battery may be damaged by exhaustive dis-
charging.
Be sure to observe the notes on disconnecting
and chargi ng th
e batteries under "Bat-
tery“ (Ypage 227). You can obtain information
about trickle chargers from a qualified specialist
workshop.
Parking brake
GWARNING
If you leave children unsupervised in the vehi-
cle, they could set it in motion by, for example:
Rrelease the parking brake.
Rshift the automatic transmission out of the
parking position P.
Rstart 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.
GWARNING
If you must brake the vehicle with the parking brake, the braking distance is considerably
longer and the wheels could lock. There is an
increased danger of skidding and accidents.
Only use the parking brake to brake the vehi-
cle when the service brake is faulty. Do not
apply the parking brake too firmly. If the
wheels lock, release the parking brake until
the wheels begin turning again.
The brake lamps are not illuminated when you
brake the vehicle using the parking brake.
As a rule, you may only apply the parking brake
when the vehicle is stationary.
XTo apply the parking brake: pull brake
lever :up as far as the last possible detent.
The c warning lamp in the instrument
cluster lights up if the engine is running.
iOn vehicles with a folding brake lever, you
can then press lever :down to the stop.
XTo release the parking brake: on vehicles
with a folding brake lever, first pull brake
lever :up to the stop.
XRaise brake lever :slightly and press
release knob ;.
XGuide brake lever :down to the stop.
The c indicator lamp in the instrument
cluster goes out.
Parking131
Driving an d parking
Z

Storing and maintaining the current
speed
XAccelerate the vehicle to the desired speed
above 20 mph (30 km/h).
XBriefly push the cruise control lever up:or
down ?.
XRelease the accelerator pedal.
Cruise control is activated. The current speed
is stored.
The display shows the Vsymbol and the
stored speed.
Resuming the stored speed
GWARNING
If you call up the stored speed and it differs
from the current speed, the vehicle acceler-
ates or decelerates. If you do not know the
stored speed, the vehicle could accelerate or brake unexpectedly. There is a risk of an acci-
dent.
Pay attention to the road and traffic condi-
tions before calling up the stored speed. If you
do not know the stored speed, store the
desired speed again.
XBriefly pull the cruise control lever towards
you =.
XRelease the accelerator pedal.
Cruise control is activated and resumes the
vehicle's speed to the last speed stored.
The display shows the Vsymbol and the
stored speed.
iWhen you pull the cruise control level
towards you for the first time after starting the
engine, cruise control adopts the current
speed.
Setting the speed
It may be a moment before the vehicle starts to
accelerate or brake to the set speed. Take this
delay into account when setting the speed.
XBriefly push the cruise control lever up :to
increase the speed or down =to reduce the
speed.
The last stored speed increases or decreases
in 1 mph increments (1 km/h increments).
or
XPress and hold the cruise control lever up :
or down =until the desired speed has been
reached.
XRelease the cruise control lever.
The current speed is stored.
The display shows the Vsymbol and the
stored speed.
iCruise control is not deactivated if you
depress the accelerator pedal. If you acceler-
ate briefly to overtake, for example, cruise
control resumes the vehicle’s speed to the
last speed stored after you have finished over-
taking.
Deactivating cruise control
There are various ways to deactivate cruise con- trol:
XBriefly press the cruise control lever for-
wards ?.
or
XApply the brakes.
The last speed set remains stored. The last
speed stored is deleted when you switch off the
engine.
Cruise control is deactivated automatically
when:
Ryou apply the brakes
Ryou apply the parking brake and the c
indicator lamp in the instrument cluster lights
up
Ryou are driving slower than 20 mph (30 km/h)
Ryou shift the automatic transmission to neu-
tral position Nwhile the vehicle is in motion
RESP®or ASR intervenes
Rthere is a malfunction in the ESP®, ASR or ABS
system
Driving systems141
Driving and parking
Z

If you approach an obstacle and the distance
warning function detects a risk of a collision, the
system will alert you both visually and acousti-
cally.
In particular, the detection of obstacles can be
impaired in the case of:
Rdirt on the sensors or anything else covering
the sensors
Rsnow or heavy rain
Rinterference from other radar sources
Rthere are strong radar reflections, for exam-
ple in parking garages
Ra narrow vehicle traveling in front, e.g. a
motorbike
Ra vehicle traveling in front on a different line
Following damage to the front end of the vehicle,
have the configuration and operation of the
radar sensor checked at a qualified specialist
workshop. This also applies to collisions at slow
speeds where there is no visible damage to the
front of the vehicle.
Activating/deactivating the distance
warning function
When you switch on the engine, the distance
warning function switches on after a few sec-
onds.
XTo deactivate: press theæbutton
(Ypage 35).
Vehicles without steering wheel buttons:
the Ä warning lamp in the instrument clus-
ter lights up and the OFF
message flashes. The
message then disappears and the Äindi-
cator lamp remains lit.
Vehicles with steering wheel buttons: the
Ä warning lamp in the instrument cluster
flashes and the Distance
warningsystemdeactivatedmessage appears .The mes-
sage then disappears and the Äwarning
lamp remains lit.
XTo activate: press theæbutton again
(Ypage 35).
Vehicles without steering wheel buttons:
the Ä warning lamp in the instrument clus-
ter lights up and the on
message flashes. The
message then disappears and the Äindi-
cator lamp goes out.
Vehicles with steering wheel buttons: the
Ä warning lamp in the instrument cluster
flashes and the Distance
warningsystemactivatedmessage appears in the multi- function display. The message then disap-
pears and the indicator lamp
Ägoes out.
Adaptive Brake Assist
iObserve the "Important safety notes" sec-
tion for driving safety systems (Ypage 52).
GWARNING
Adaptive Brake Assist cannot always clearly
identify objects and complex traffic situa-
tions.
In such cases, Adaptive Brake Assist can:
Rintervene unnecessarily
Rnot intervene
There is a risk of an accident.
Always pay careful attention to the traffic sit- uation and be ready to brake. Terminate the
intervention in a non-critical driving situation.
GWARNING
Adaptive Brake Assist does not react:
Rto people or animals
Rto oncoming vehicles
Rto crossing traffic
Rto stationary obstacles
Rwhen cornering
As a result, the Adaptive Brake Assist may not
intervene in all critical conditions. There is a
risk of an accident.
Always pay careful attention to the traffic sit- uation and be ready to brake.
Adaptive Brake Assist aids you when braking
during hazardous situations at speeds above
20 mph (30 km/h). With the help of Adaptive
Brake Assist, the distance warning signal can
detect obstacles that are in the path of your
vehicle for an extended period of time.
When you approach an obstacle and adaptive
Brake Assist detects that there is a risk of a col- lision, adaptive Brake Assist calculates the brak-
ing force necessary to avoid a collision. Should
you apply the brakes forcefully, adaptive Brake
Assist will automatically increase the braking
force to the calculated level.
Driving systems143
Driving and parking
Z

Blind Spot Assist monitors the area approx-
imately 10 ft (3.0m) behind your vehicle and
approximately 1.6 ft (0.5 m)to 11.5 ft (3.5 m)
ea ch side of it. For this purpose, Blind Spot
Assist uses radar sensors in the rear bumper
and behind the protective strips of the B-pillars.
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:
Ra clear warning situation may not occur. The
yellow indicator lamp on the relevant side of
the vehicle will then light up.
Rwarnings may be issued in error when driving
close to crash barriers or similar solid lane
borders.
Rwarnings may be interrupted when driving
alongside particularly long vehicles, for exam-
ple trucks, for a prolonged time.
The four sensors of Blind Spot Assist are inte-
grated into the rear bumper and behind the pro-
tective strips of the B-pillars. Make sure that the
bumper and protective stripping are free of dirt,
ice or slush in the vicinity of the sensors. The
radar sensors must not be covered, for example
by cycle racks or overhanging loads. Have the function of the radar sensors checked
at a qualified specialist workshop:
Rafter a severe impact
Rafter damage to the bumper
Rafter damage to the protective strips of the B-
pillars
Blind Spot Assist may otherwise not work prop-
erly.
Indicator and warning display
Blind Spot Assist is not active at speeds below
approximately 20 mph (30 km/h). Vehicles in
the monitoring range are then not indicated.
:Yellow indicator lamp/red warning lamp
If yellow indicator lamp :lights up:
Ryou are driving at less than 20 mph (30 km/h)
RBlind Spot Assist is deactivated
RBlind Spot Assist is malfunctioning
Rthere is no clear warning, depending on the
situation
Blind Spot Assist is active from a speed of
20 mph (30 km/h). If a vehicle is detected in the
blind spot monitoring range, red warning
lamp :on the corresponding side lights up.
This warning occurs when a vehicle enters the
blind spot monitoring range from behind or from
the side. When you overtake a vehicle, the warn-
ing only occurs if the difference in speed is less
than 14 mph (22 km/h).
Yellow indicator lamp :goes out if reverse gear
is engaged. Blind Spot Assist is then deactiva-
ted.
The brightness of the indicator/warning lamps
is adjusted automatically according to the ambi- ent light.
Driving systems145
Driving and parking
Z