2017 MERCEDES-BENZ SLC stop start

Problem
Possible causes/consequences and P Solutions
The coolant temperature
gauge shows av alue
above 248 ‡( 120 †).
The coolant warning
lamp may also be on and
aw arning tone may
sound. The coolant level is too low. The coolant is too hot and the engine is no
longer being cooled sufficiently. X
Stop as soon as possible and allow the engine and the coolant to
cool down. X
Check the coolant level ( Y
page 233). Observe the warning notes
as you do so and add coolant if necessary.
If the coolant level is correct ,t he engine radiator fan may be faulty. The
coolant is too hot and the engine is no longer being cooled sufficiently. X
At coolant temperatures below 248 ‡( 120 †), drive to the nearest
qualified specialist workshop. X
Avoid heavy loads on the engine as you do so, e.g. driving in moun-
tainou st errai na nd stop-and-go traffic.
DYNAMIC SELEC Tb uttonUse the DYNAMIC SELECT button to change the
drive program. Depending on the drive program
selected the following vehicle characteristics
wil lc hange: R
the drive (engine and transmission manage-
ment) R
the suspensio n( vehicles with adaptive
adjustabl ed amping or AMG sports suspen-
sion) R
the steering R
the availability of the ECO start/stop function
Each time you start the engine with the Smart-
Key or the Start/Stop button, drive program C is
activated. For further information about starting
the engine, see ( Y
pag e1 16).
X
Press DYNAMIC SELECT button C as many
times as necessary until the desired drive
progra miss elected.
The selected drive progra ma ppears in the
multifunction display. After as hort time the displa yg oes out and the status icon of the
selected drive progra ma ppears.
In addition, the current drive progra ms ettings
are displayed briefly in the multimedi as ystem
display.
i In af ew countries, the ECO start/stop func-
tion is deactivated at the factory due to the
available fuel grade. In this case, the ECO
start/stop function is not available in any
drive program, regardless of the displa yint he
multimedi as ystem display.
Availabl ed rive programs:
C Comfort Comfortabl ea nd economi-
cal driving characteristics
S Sport Sporty driving characteris-
tics
S+ Sport Plus Particularly sporty driving
characteristics
I Individual Individua ls ettings
E Economy Particularly economical
driving characteristics
Additional information for drive programs
( Y
pag e1 25).DYNAMI CS ELEC Tb utton 121
Driving and parking Z

The current transmission position and drive pro-
gram appear in the multifunction display.
Engaging par kp osition PX
When the vehicle is stationary, depress the
brake pedal. X
Press button C .
Engaging par kp osition Pa utomaticallyPark position P is automatically engaged if:R
you switch off the engine using the SmartKey
and remove the SmartKey R
you switch off the engine using the SmartKey
or using the Start/Stop button and open the
driver's door or front-passenger door R
the driver's door is opened when the vehicle is
stationary or driving at very low speed and the
transmission is in position D or R
Under certain conditions, the automatic trans-
mission shifts automatically to transmission
position P if the HOLD function or Distance Pilot
DISTRONIC is activated. Observe the informa-
tion on the HOLD function ( Y
page 148) and on
Distance Pilot DISTRONIC ( Y
page 144).
Engaging reverse gear R
! Only shift the automatic transmission to R
when the vehicle is stationary. X
Depress the brake and keep it pressed. X
Push the selector lever forwards past the first
point of resistance.
The ECO start/sto pf unction is not available
when reverse gear is engaged. Further informa-
tion on the ECO start/sto pf unction
( Y
page 118). Shifting to neutral N
G WARNING
If children are left unsupervised in the vehicle,
they could: R
open the doors, thus endangerin go ther
people or road users. R
get out and disrupt traffic. R
operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they: R
release the parking brake. R
shiftin gt he automatic transmission out of
park position P R
Start the engine.
There is ar isk of an accident and injury.
When leaving the vehicle, alway st ake the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children. X
When the vehicle is stationary, depress the
brake pedal. X
Push the selector lever forwards or back to
the first point of resistance.
If you switch the engine off with the transmis-
sion in position R or D ,t he automatic transmis-
sion shifts to N automatically.
With the SmartKey: if you then open the driv-
er's door or the front-passenger door or remove
the SmartKey from the ignition, the automatic
transmission shifts to P automatically.
With KEYLESS-GO: if you then open the driver's
or front-passenger door, the automatic trans-
mission shifts to P .
If you want the automatic transmission to
remain in neutral N ,e .g. when having the vehicle
cleaned in an automatic car wash with at owing
system: X
Vehicles with KEYLESS-GO: remove the
Start/Stop button from the ignition lock. X
Insert the SmartKey into the ignition lock. X
All vehicles: switch the ignition on. X
Depress the brake pedal and keep it
depressed. X
Shift to neutral N .Automatic transmission 123
Driving and parking Z

Problems with the transmission Problem
Possible causes/consequences and P Solutions
The transmission has
problems shifting gear. The transmission is losing oil. X
Have the transmission checked at aq ualified specialist workshop
immediately.
The acceleration ability
is deteriorating.
The transmission no lon-
ger changes gear. The transmission is in emergency mode.
It is only partly possible to engage the gears or the transmission is in
position N . X
Stop the vehicle. X
Shift the transmission to position P .X
Switch off the engine. X
Wait at least ten seconds before restarting the engine. X
Shift the transmission to position D or R .X
Have the transmission checked at aq ualified specialist workshop
immediately.
Refueling
Important safety notes
G WARNING
Fuel is highly flammable. If you handle fuel
incorrectly, there is ar isk of fire and explo-
sion.
You must avoid fire, open flames, creating
sparks and smoking. Switch off the engine
and, if applicable, the auxiliary heating before
refueling.
G WARNING
Fuel is poisonous and hazardous to health.
There is ar isk of injury.
You must make sure that fuel does not come
into contact with your skin, eyes or clothing
and that it is not swallowed. Do not inhale fuel
vapors. Keep fuel away from children.
If you or others come into contact with fuel,
observe the following: R
Wash away fuel from skin immediately
using soap and water. R
If fuel comes into contact with your eyes,
immediately rinse them thoroughly with clean water. Seek medical assistance with-
out delay. R
If fuel is swallowed, seek medical assis-
tance without delay .Don ot induce vomit-
ing. R
Immediately change out of clothing which
has come into contact with fuel.
G WARNING
Electrostatic buildu pc an create sparks and
ignite fuel vapors. There is ar isk of fire and
explosion.
Always touch the vehicle body before opening
the fuel filler flap or touching the fuel pump
nozzle. Any existing electrostatic buildu pi s
thereby discharged.
Do not get into the vehicle again during the refu-
eling process. Otherwise, electrostatic charge
could build up again.
! Do not use diesel to refuel vehicles with a
gasoline engine. Do not switch on the ignition
if you accidentally refuel with the wrong fuel.
Otherwise, the fuel will enter the fuel system.
Even small amounts of the wrong fuel could
result in damage to the fuel system and the
engine. Notify aq ualified specialist workshop
and have the fuel tank and fuel lines drained
completely. Refueling 129
Driving and parking Z

cle from rolling away by applying the parking
brake. X
Appl yt he electri cp ar king brake.X
Shif tt he transmission to position P
( Y
page 123).X
With the SmartKey: turn the SmartKey to
position 0 in the ignition lock and remove it.
The immobilizer is activated. X
With KEYLESS-GO: press the KEYLESS-GO
Start/Stop button ( Y
page 115).
The engine stop sa nd al lt he indicator lamps in
the instrument cluster go out.
Whe nt he driver' sd oo risc losed, this corre-
sponds to SmartKey position 1 .W he nt he
driver' sd oo riso pen, this corresponds to
SmartKey position 0 ( Y
page 115).
The engine can be switched off while the vehicle
is in motio nb yp ressing and holding the Start/
Stop button for abou tt hree seconds. Thi sf unc-
tion operate si ndependently of the ECO start/
stop automatic engine switch-off function.
Electric parkin gb rake
General notes
G WARNING
If yo ul ea ve childre nu nsupervised in the vehi-
cle ,t hey could set it in motio nb y, for example:R
release the parking brake. R
shift the automatic transmission ou toft he
parking position P .R
star tt he engine.
In addition, they may operate vehicle equip-
ment and become trapped .T here is ar is ko f
an accident and injury.
Whe nl ea ving the vehicle ,a lway st ake the
SmartKey with yo ua nd lock the vehicle .N ever
leave childre nu nsupervised in the vehicle. The function of the electri cp ar king brake is
dependent on the on-board voltage .Ift he on-
board voltage is low or there is am alfunction in
the system, it may not be possible to appl yt he
released parking brake. X
If this is the case ,o nly park the vehicle on
level ground and secure it to prevent it rolling
away. X
Shif tt he automatic transmission to position
P .
It may not be possible to release an applied
parking brake if the on-board voltage is low or
there is am alfunction in the system. Contact a
qualified specialist workshop.
The electri cp ar king brake performs af unction
test at regula ri nterval sw hile the engine is
switched off. The sounds that can be heard while
this is occurring are normal.
Applyin gorr eleasin gm anually
X
To engage: push handle C .
Whe nt he electri cp ar king brake is engaged,
the I (USA only )o r $ (Canada only)
red indicator lamp lights up in the instrument
cluster.
The electri cp ar king brake can also be applied
whe nt he SmartKey is removed. X
To release: pull handle C .
The red I (USA only )o r $ (Canada
only )i ndicator lamp in the instrument cluster
goe so ut .
The electri cp ar king brake can only be released: R
if the SmartKey is in position 1 in the ignition
lock ( Y
page 115) or R
if the ignition wa ss witched on using the
Start/Stop button132
Parking
Drivin ga nd parking

for example, the power steering and the brake
boosting effect. You wil lr equire considerably
more effort to steer and brake. There is ar isk
of an accident.
Do not switch off the ignition while driving.
G WARNING
If you operate mobile communication equip-
ment while driving, you wil lbed istracted from
traffic conditions. You coul da ls ol ose control
of the vehicle. There is ar isk of an accident.
Only operate this equipment when the vehicle
is stationary.
Observe the lega lr equirements for the country
in which you are driving. Some jurisdictions pro-
hibi tt he drive rf rom using am obile phone while
driving av ehicle.
If you make ac all while driving, alway su se
hands-free mode. Only operate the telephone
when the traffic situation permits. If you are
unsure, pul lo ver to as afe location and stop
before operating the telephone.
Bear in mind that at as pee dofo nly 30 mph
(approximately 50 km/h) ,t he vehicl ec overs a
distance of 44 ft (approximately 14 m) per sec-
ond.
Drive sensibly –s ave fuelObserve the following tips to save fuel: R
The tires should always be inflated to the rec-
ommended tire pressure. R
Remove unnecessary loads. R
Warm up the engin eatl ow engin es peeds.R
Avoid frequen ta cceleration or braking.R
Observe the servic ei ntervals in the Mainte-
nanc eB ooklet or in the servic ei nterval dis-
play. Have all the maintenanc ew ork carried in
accordance with Daimler AG regulations.
Fuel consumption also increases when driving in
cold weather, in stop-start traffic and in hilly ter-
rain.
Drinking and driving
G WARNING
Drinkin ga nd driving and/or takin gd rugs and
driving are very dangerous combinations. Even as mall amount of alcohol or drugs can
affect your reflexes, perceptions and judg-
ment.
The possibility of as erious or even fatal acci-
dent is greatly increased when you drink or
take drugs and drive.
Do not drink or take drugs and drive or allow
anyone to drive who has been drinking or tak-
ing drugs.
Emission control
G WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases leads to poisoning. There
is ar isk of fatal injury. Therefor en ever leave
the engin er unning in enclosed spaces with-
out sufficien tv entilation.
Certain engin es ystems are designed to keep
the level of poisonous component sine xhaust
fumes within legal limits.
These systems only work at peak efficiency if
they are serviced exactly in accordance with the
manufacturer's specifications .A lways have
work on the engin ec arried out at aq ualified
specialist workshop. Mercedes-Benz recom-
mends that you use an authorized Mercedes-
Ben zC enter for this purpose. Work relevant to
safety or work on safety-related systems in par-
ticular must be carried out at aq ualified spe-
cialist workshop.
The engin es ettings must not be changed under
any circumstances. Furthermore, all specific
servic ew ork must be carried out at regular
intervals and in accordance with the Mercedes-
Ben zs ervic er equirements. Details can be found
in the Maintenanc eB ooklet.
ECO display
The ECO display shows you how economical
your driving style is. The ECO display assists you
in achievin gt he most economical driving style
for the selected settings and prevailing condi-
tions. Your driving style can significantly influ-
enc et he vehicle's consumption.134
Driving tips
Driving and parking

In addition to driving style, the actual consump-
tion is affected by other factors, such as: R
load R
tire pressure R
cold start R
choice of route R
active electrical consumers
These factors are not include dint he ECO dis-
play.
An economical driving style specially requires
driving at moderate engine speeds.
Achieving ah igher valu eint he categories
"Acceleration" and "Constant": R
observe the gearshift recommendations. R
drive the vehicle in drive program C or E .
On long journeys at ac onstant speed ,e .g. on the
highway, only the outer area for "constant" will
change.
The ECO display summarizes the driving style
from the start of the journey to its completion.
Therefore, there are more marked changes in
the outer area satt he start of aj ourney. On lon-
ger journeys, there are fewer changes. For more
marked changes, perform am anua lr est
( Y
page 167).
For more information on the ECO display, see
( Y
page 166).
Braking
Important safety notes
G WARNING
If you shift down on as lippery road surface in
an attempt to increase the engine's braking
effect, the drive wheel sc ould lose their grip.
There is an increased danger of skidding and
accidents.
Do not shift down for additional engine brak-
ing on as lippery road surface.
Downhill gradients
! On long, steep gradients, you must reduce
the load on the brakes. To use engine braking,
shift to al owe rg ear in good time. This helps
you to avoid overheating the brakes and wear-
ing them out excessively. When making use of the engine braking
effect, it is possible that ad rive wheel may not
turn for some time, e.g. in the case of sud-
denly changing or slippery road surface con-
ditions. This could cause damage to the drive
train. This type of damage is not covered by
the Mercedes-Benz warranty.
Change into al owe rg ear in good time on long
and steep downhill gradients. This is especially
important if the vehicle is laden.
This also applies if you have activated cruise
control or Distance Pilo tD ISTRONIC.
Heavy and light loads
G WARNING
If you rest you rf oot on the brake peda lw hile
driving, the braking system can overheat. This
increases the stopping distance and can even
cause the braking system to fail .T here is a
risk of an accident.
Never use the brake peda lasaf ootrest. Never
depres st he brake peda la nd the accelerator
peda latt he same time.
! Depressing the brake peda lc onstantly
results in excessive and premature wea rt o
the brake pads.
If the brakes have been subjected to ah eavy
load ,don ot stop the vehicle immediately ,b ut
drive on for as hort while. This allows the airflow
to cool the brakes more quickly.
Wet roads If you have driven for al ong time in heavy rain
withou tb raking, there may be ad elayed reac-
tion from the brakes when braking for the first
time. This may also occur after the vehicle has
been washed or driven through deep water.
You then have to depres st he brake peda lm ore
firmly .M aintai nag reater distance from the
vehicle in front.
After driving on aw et road or having the vehicle
washed, brake firmly whil ep aying attention to
the traffic conditions. This wil lw arm up the
brake discs, thereby drying them more quickly
and protecting them against corrosion.136
Driving tips
Driving and parking

Changing lanes If you want to change to th eo vertakin gl ane on
multi-lan er oads ,D istance Pilot DISTRONIC sup-
port sy ou ifR
you are driving faster than 45 mph (70 km/h) R
Distance Pilot DISTRONIC is maintaining the
distanc etoav ehicle in frontR
you switch on th ea ppropriat et ur ns ignalR
Distance Pilot DISTRONIC does no tc urrently
detect ad anger of collision
If these condition sa re fulfilled, your vehicle is
accelerated. Acceleration will be interrupte di f
changin gl ane st akes to ol on gorift he distance
between your vehicle and th ev ehicle in front
become st oo small.
i When you change lanes, Distance Pilot
DISTRONIC monitors th el eft lane (on left-
hand-driv ev ehicles) or th er igh tl ane (on right-
hand-driv ev ehicles).
Stopping
G WARNING
If you leave th ev ehicle when it is only being
braked by Distance Pilot DISTRONIC, it could
roll away if: R
there is am alfunctio nint he system or in
th ev oltage supply.R
Distance Pilot DISTRONIC is switche do ff
usin gt he cruise control lever, e.g .bya vehi-
cle occupant or from outside th ev ehicleR
th ee lectrical system in th ee ngine com-
partment, th eb attery or th ef use sa re tam-
pere dw ith.R
th eb attery is disconnectedR
th ev ehicle is accelerated, e.g .bya vehicle
occupant.
Ther eisar isk of an accident.
Before leavin gt he vehicle ,a lways deactivate
Distance Pilot DISTRONIC and secure the
vehicle against rolling away.
Further informatio nond eactivatin gD istance
Pilot DISTRONIC ( Y
page 146).
If Distance Pilot DISTRONIC detect st ha tt he
vehicle in fron tiss to pping, it brakes your vehicle
until it is stationary. Once your vehicle is stationary, it remains sta-
tionar ya nd you do no tn ee dtod epress the
brake.
i Afte rat ime, th ee lectric parking brake
secures th ev ehicle and relieves th es ervice
brake.
i Dependin gont he specified minimum dis-
tance, your vehicle will com etoas ta ndstil la t
as ufficient distanc eb ehin dt he vehicle in
front. The specified minimum distanc eiss et
usin gt he control on th ec ru ise control lever.
When Distance Pilot DISTRONIC is act ivated,
t h et ra n
smission is shifte da utomatically to
position P if: R
th ed river' ss eat belt is no tf astene da nd the
driver' sd oor is open. R
th ee ngine is switched off ,u nless it is auto-
matically switched off by th eE CO start/stop
function.
The electric parking brak es ecures th ev ehicle
automatically if Distance Pilot DISTRONIC is
activated when th ev ehicle is stationar ya nd:R
as ystem malfunctio no ccurs.R
th ep ower supply is no ts ufficient.
If am alfunctio no ccurs, th et ra nsmission may
also shif ti nt op osition P automatically.
Settin gas peedKeep in min dt ha titm ay tak eab rie fm oment
until th ev ehicle has accelerate dorb raked to
th es pee ds et. X
To adjust th es et spee di n1m ph incre-
ments (1 km/h increments): briefly press
th ec ru ise control leve ru p C to th ep ressure
poin tf or ah igher speed, or down D for a
lower speed.
Every tim et he cruise control leve risp ressed
up or down ,t he last spee ds to re disi ncreased
or reduced. X
To adjust th es et spee di n5m ph incre-
ments (1 0k m/h increments): briefly press
the cruise control lever up C past the pres-
sure point for ah igher speed, or down D for
al ower speed.
Ever yt ime the cruise control lever is pressed
up or down, the last speed stored is increased
or reduced.144
Driving systems
Driving and parking

HOLD function
General notes The HOLD function can assist the drive rint he
following situations: R
when pulling away, especially on steep slopes R
when maneuvering on steep slopes R
when waiting in traffic
The vehicl eisk ept stationary without the driver
having to depress the brake pedal.
The braking effect is cancele da nd the HOLD
function deactivated when you depress the
accelerator peda ltop ul la way.
Important safety notes
G WARNING
When leaving the vehicle, it can still roll away
despite being braked by the HOLD function if: R
there is am alfunction in the system or in
the voltag es upply.R
the HOLD function has been deactivated by
pressing the accelerator peda lort he brake
pedal, e.g. by av ehicl eo ccupant.R
the electrical system in the engine com-
partment, the battery or the fuse sh ave
been tampere dw ith.R
the battery is disconnected
There is ar isk of an accident.
If you wis htoe xit the vehicle, alway st urn off
the HOLD function and secure the vehicle
against rolling away.
! When Distance Pilot DISTRONIC or the
HOLD function is activated, the vehicle
brakes automatically in certain situations.
To avoi dd amage to the vehicle, deactivate
Distance Pilot DISTRONIC and the HOLD
function in the following or similar situations: R
when towing the vehicle R
in the car wash
Deactivating the HOLD function ( Y
pag e1 48). Activation conditions You can activate the HOLD function if all of the
following conditions are fulfilled: R
the vehicl eiss tationary. R
the engine is running or if it has been auto-
matically switched off by the ECO start/stop
function. R
the driver's door is closed or you rs eat bel ti s
fastened. R
the electric parking brake is released. R
the transmission is in position D , R or N .R
Distance Pilot DISTRONIC is deactivated
Activating the HOLD function X
Make sure that the activation conditions are
met. X
Depress the brake pedal. X
Quickly depress the brake peda lf urther
until C appears in the multifunction display.
The HOLD function is activated. You can
release the brake pedal.
i If depressing the brake peda lt he first time
does not activate the HOLD function, wait
briefly and then try again.
Deactivatin gt he HOLD functionThe HOLD function is deactivated automatically
if: R
you accelerate and the transmission is in
position D or R . R
you shift the transmission to position P .R
you apply the brakes again with ac ertain
amount of pressure until HOLD disappears
from the multifunction display. R
you secure the vehicl eu sing the electric park-
ing brake. R
you activate Distance Pilot DISTRONIC.
i After at ime, the electric parking brake
secure st he vehicl ea nd relieves the service
brake.148
Driving systems
Driving and parking