2017 MERCEDES-BENZ SLC warning lights

Display messages
Possible causes/consequences and P Solutions
The yellow $ warning lamp lights up and th er ed I (US Ao nl y)
or $ (Canada only) indicator lamp flashes .
It is no tp ossibl etoa pply th ee lectric parking brak em anually.X
Shift th et ra nsmission to position P .X
Visit aq ualified specialist workshop .
' (USA
only)
M (C anada
only)
Check Brake Fluid
Level There is no te no ugh brak ef luid in th eb rak ef luid reservoir .
In addition ,t he ' (US Ao nl y) or M (Canada only) warning lamp
lights up in th ei nstrumen tc luste ra nd aw arning tone sounds.
G WARNIN G
The braking effec tm ay be impaired.
There is ar is kofana ccident.X
Pull ove ra nd stop th ev ehicl es afely as soo nasp ossible, payin g
attention to roa da nd traffic conditions. Do no tc ontinue drivin g
under any circumstances. X
Secur et he vehicl ea gainst rollin ga way ( Y
page 131).X
Consult aq ualified specialist workshop .X
Do no ta dd brak ef luid .T his does no tc orrect th em alfunction .
& Check Brake Pad Wea r The brak ep ads/linings hav er eached their wear limit.X
Visit aq ualified specialist workshop .
S Inoperative On eorm or em ain features of th em brace system are malfunctioning .X
Hav et he mbrace system checke dataq ualified specialist work-
shop.
PRE-SAFE Inopera‐
tiv e See Operator' s
Manual Importan tf unction sofP RE-SAF E ®
hav ef ailed. Al lo th er occupant
safet ys ystems ,e .g .a ir bags ,r emain available.X
Visit aq ualified specialist workshop immediately.
Active Brake Assist
Functions Currently
Limite dS ee Opera‐
tor's Manual Active Brake Assis tist em porarily inoperative.
Possibl ec auses are: R
th er adar sensor system is temporarily inoperative, e.g. due to elec -
tromagneti cr adiation emitted by nearby TV or radi os ta tion so r
other source sofe lectromagneti cr adiationR
th es ystem is outside th eo perating temperature rangeR
th eo n-bo ar dv oltag eist oo low.
Whe nt he causes state da bov enol onger apply, th ed isplay message
disappears.
Active Brake Assis tiso perational again .
If th ed isplay message does no td isappear :X
Pull ove ra nd stop th ev ehicl es afely as soo nasp ossible, payin g
attention to roa da nd traffic conditions.X
Secur et he vehicl ea gainst rollin ga way ( Y
page 131).X
Restart th ee ng ine.184
Display messages
On-boar dc omputer an dd isplays

Display messages
Possible causes/consequences and P Solutions
Active Brake Assist
Functions Limite d
See Operator' sM an ‐
ual Active Brake Assis tisu navailable due to am alfunction .X
Visit aq ualified specialist workshop .
Radar Sensor s Dirty
See Operator' sM an ‐
ual The radar sensor system is malfunctioning .
Possibl ec auses are: R
Dirt on sensor sR
Heavy rain or snow R
Whe nd rivin goni nter-urban roads without traffic or infrastructure,
e.g. in desert-like area s
At least on ed rivin gs ystem or drivin gs afet ys ystem is malfunctioning
or is temporarily unavailable :R
Active Brake Assis tR
Distanc eP ilo tD ISTR ONI C
Once th ec aus eoft he problem is no longer present, th ed rivin ga nd
drive safet ys ystems will be available again .T he display message dis-
appears.
If th ed isplay message does no td isappear :X
Pull ove ra nd stop th ev ehicl es afely as soo nasp ossible, payin g
attention to roa da nd traffic conditions.X
Secur et he vehicl ea gainst rollin ga way ( Y
page 131).X
Switc ho ff th ee ng ine.X
Clean all sensor s( Y
page 240).X
Restart th ee ng ine.
The display message disappears.
u SRS Malfunction Ser ‐
vic eR equired The restrain ts ystem is malfunctioning .T he u warning lamp also
lights up in th ei nstrumen tc luster.
G WARNIN G
The air bags or Emergency Tensioning Devices may either be triggered
unintentionally or, in th ee vent of an accident, may no tbet ri ggered .
There is an increased ris kofi njury.X
Visit aq ualified specialist workshop immediately.
Fo rf urther information about th er estrain ts ystem, see ( Y
page 37) .
u Front Lef tM alfunc‐
tio nS ervic e
Required or Fr on t
Right Malfunction
Servic eR equired The restrain ts ystem has malfunctioned at th ef ront on th el ef torr ight .
The u warning lamp also lights up in th ei nstrumen tc luster.
G WARNIN G
The air bags or Emergency Tensioning Devices may either be triggered
unintentionally or, in th ee vent of an accident, may no tbet ri ggered .
There is an increased ris kofi njury.X
Visit aq ualified specialist workshop immediately. Display messages 18 5
On-boar dc omputer an dd isplays Z

Display messages
Possible causes/consequences and P Solutions
u Lef tS id eC urtai n
Airbag Malfunction
Servic e
Required or Ri gh t
Sid e Curtai n Airbag
Malfunction Servic e
Required There is am alfunction in th el eft-han da nd/o rr ight-hand head bag.
The u warning lamp also lights up in th ei nstrumen tc luster.
G WARNIN G
The lef torr ight head bag may either be triggered unintentionally or, in
th ee vent of an accident, may no tbet ri ggered .
There is an increased ris kofi njury.X
Visit aq ualified specialist workshop immediately.186
Display messages
On-boar dc omputer an dd isplays

General notes The multimedia system section in this manual
describes the basi cp rinciples for operation.
More information can be found in the Digital
Operator's Manual.
Important safety notes
G WARNING
If you operate information systems and com-
municatio ne quipment integrated in the vehi-
cle whil ed riving, you wil lbed istracted from
traffic conditions. You could also lose control
of the vehicle .T here is ar isk 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.
You must observe the lega lr equirements for the
country in which you are currently driving when
operating the multimedia system.
The multimedia system calculates the route to
the destination withou tt aking the following into
account, for example: R
traffic lights R
stop and yield signs R
parking or stopping restrictions R
road narrowing R
other road and traffic rule sa nd regulations
The multimedia system may give incorrect nav-
igation recommendations if the actual street/
traffic situation does not correspond with the
digital map's data.
For example: R
ad iverted route R
the road layout or the direction of ao ne-way
street has been changed
For this reason, you must alway so bserve road
and traffic rule sa nd regulations during your
journey. Roa da nd traffic rule sa nd regulations
alway sh ave priority over multimedia system
driving recommendations.
Navigation announcements are intended to
direct you whil ed riving withou td iverting your
attention from the road and driving. Please alway su se this feature instead of con-
sulting the map display for directions. Looking
at the icons or map display can distract you from
traffic conditions and driving, and increase the
risk of an accident.
This equipment complies with FCC radiation
exposure limits set forth for uncontrolled equip-
ment and meets the FCC radi of requency (RF)
Exposure Guidelines in Supplement CtoO ET65.
This equipment has very low level sofRFe nergy
that is deeme dtoc omply withou tm aximum
permissive exposure evaluation (MPE). How-
ever, it is recommended to insta ll it at ad ista
nce
of at least 8i nches (approx. 20 cm) betwee nt he
radiation source and ap erson's body (not
including limb ss uch as hands, wrists, feet and
legs).
G WARNING
Modifications to electronic components, their
software as wel lasw iring can impair their
function and/or the function of other net-
worked components. In particular, systems
relevant to safety could also be affected. As a
result, these may no longer function as inten-
ded and/or jeopardize the operating safety of
the vehicle .T here is an increase dr isk of an
accident and injury.
Never tamper with the wiring as wel lase lec-
tronic components or their software .Y ou
shoul dh ave all work to electrica la nd elec-
tronic equipment carried out at aq ualified
specialist workshop.
If you make any changes to the vehicle elec-
tronics, the general operating permit is ren-
dered invalid.
Function restrictions
For safety reasons, some functions are restric-
ted or unavailable whil et he vehicle is in motion.
You wil ln otice this, for example, because either
you wil ln ot be abl etos elect certain menu items
or am essag ew il la ppear to this effect.Function restrictions 211
Multimedia system Z

! Make sure that: R
the side windows and the roof are com-
pletely closed R
the climate control blower is switched off R
the windshiel dw iper switch is at position 0
The vehicle could otherwise be damaged.
You can wash the vehicle in an automatic car
wash from the very start.
If the vehicle is very dirty, pre-wash it before
cleaning it in an automatic car wash.
After using an automatic car wash, wipe off wax
from the windshiel da nd the wiper blades. This
will prevent smears and reduce wiping noises
caused by residue on the windshield.
Washing by hand In some countries, washing by hand is only
allowed at speciall ye quipped washing bays.
Observe the legal requirements in each country. X
Do not use hot water and do not wash the
vehicle in direct sunlight. X
Use as oft sponge to clean.X
Use am ild cleaning agent, such as ac ar
shampoo approved by Mercedes-Benz. X
Thoroughly hose down the vehicle with ag en-
tle jet of water. X
Do not point the water jet directly towards the
air inlet. X
Use plenty of water and rinse out the sponge
frequently. X
Rinse the vehicle with clean water and dry
thoroughly with ac hamois.X
Do not let the cleaning agent dry on the paint-
work.
Carefully remove all deposits of road salt as
soon as possible when driving in winter.
Powe rw ashers
G WARNING
The water jet from ac ircular jet nozzle (dirt
blasters) can cause invisible exterior damage
to the tires or chassis components. Compo-
nent sd amage dint his way may fail unexpect-
edly .T here is ar isk of an accident.
Do not use power washers with circular jet
nozzles to clean the vehicle. Have damaged tires or chassis component sr eplaced imme-
diately.
! Alway sm aintain ad istance of at least
11.8 in (30 cm) between the vehicle and the
power washer nozzle. Information abou tt he
correct distance is available from the equip-
ment manufacturer.
Move the power washer nozzle around when
cleaning your vehicle.
Do not aim directly at any of the following: R
Tires R
Door gaps, roof gaps, joints, etc. R
Soft top (Designo retractable hardtop) R
Electrical components R
Battery R
Connectors R
Lights R
Seals R
Trim R
Ventilation slots
Damaged seals or electrical component sc an
lead to leaks or failures.
! Do not use high-pressure cleaners if the
tank recess is open while you clean it. This
can cause damage to the seals or other com-
ponents.
Cleaning the paintwork
! Do not affix: R
stickers R
films R
magnetic plates or simila ri tems
to painted surfaces. You could otherwise
damage the paintwork.
Scratches, corrosive deposits, areas affected by
corrosion and damage caused by inadequate
care cannot always be completely repaired. In
such cases, visit aq ualified specialist workshop. X
Remove dirt immediately ,w here possible,
while avoiding rubbing too hard. X
Soak insect remains with insect remover and
rinse off the treated areas afterwards. X
Soak bird droppings with water and rinse off
the treated areas afterwards. X
Remove coolant, brake fluid, tree resin, oils,
fuels and greases by rubbing gently with a Care 237
Maintenance and care Z

Important safety notes
G WARNIN G
Eac ht ir e, includin gt he spar e( if provided),
should be checke datl east once am onth
when cold and inflated to th ep ressur er ec -
ommended by th ev ehicl em anufacturer on
th eT ir ea nd Loading Information placard on
th ed river' sd oor B-pillar or th et ir ep ressur e
label on th ei nside of th ef uel filler flap .Ify our
vehicl eh as tires of ad ifferen ts iz et ha nt he
siz ei ndicated on th eT ir ea nd Loading Infor -
mation placard or th et ir ep ressur el abel, you
should determine th ep roper tire pressur ef or
those tires .
As an added safet yf eature, your vehicl eh as
been equipped wit hat ir ep ressur em onitoring
system (TPMS) that illuminate sal ow tire pres-
sur et el ltale when on eorm or eofy our tires
are significantly underinflated. Accordingly,
when th el ow tire pressur et el ltale illuminates,
you should stop and chec ky our tires as soo n
as possible ,a nd inflat et he mtot he proper
pressure. Drivin gonas ignificantly underin-
flated tire causes th et ir etoo verheat and can
lead to tire failure. Underinflation also
reduce sf uel efficiency and tire tread life ,a nd
may affec tt he vehicle's handlin ga nd stop-
pin ga bility.
Pleas en ot et ha tt he TPM Sisn ot as ubstitut e
for proper tire maintenance ,a nd it is th ed riv -
er'
sr e sponsibilit y t om aintai nc orrect tire
pressure, eve nifu nderinflation has no t
reached th el evel to trigge ri llumination of th e
TPM Sl ow tire pressur et el ltale.
Your vehicl eh as also been equipped wit ha
TPM Sm alfunction indicator to indicat eift he
system is no to perating properly. The TPM S
malfunction indicator is combined wit ht he
low tire pressur et el ltale. When th es ystem
detects am alfunction ,t he warning lamp will
flas hf or approximately am inute and then
remain continuously illuminated. This
sequenc ew ill be repeated every time th ev ehi-
cle is started as lon gast he malfunction
exists. When th em alfunction indicator is illuminated,
th es ystem may no tbea ble to detec tors ignal
low tire pressur easi ntended. TPM Sm alfunc -
tion sm ay occur for av ariet yofr easons,
includin gt he installation of incompatible
replacemen tora lternate tires or wheels on
th ev ehicl et ha tp reven tt he TPM Sf ro mf unc-
tioning properly. Always chec kt he TPM Sm al-
function telltale after replacing on eorm or e
tires or wheels on your vehicl etoe ns ur et ha t
th er eplacemen tora lternate tires and wheels
allow th eT PM Stoc ontin ue to function prop-
erly.
It is th ed river' sr esponsibilit yt os et th et ir e
pressur etot ha tr ecommended for cold tires
whic hiss uitable for th eo perating situation
( Y
page 258). Not et ha tt he correc tt ir ep ressur e
for th ec urren to perating situation must first be
taught-in to th et ir ep ressur em onitor. If there is
as ubstantial loss of pressure, th ew arning
threshold for th ew arning message is aligned to
th er eferenc ev alue st aught-in .R estart th et ir e
pressur em onitor after adjusting th ep ressur eo f
th ec ol dt ir es ( Y
page 264). The curren tp res-
sures are saved as ne wr eferenc ev alues. As a
result ,aw arning message will appear if th et ir e
pressur ed rops sign ifica ntly.
T he tire pressur em onitor does no tw arn you of
an incorrectl ys et tire pressure. Observ et he
note sont he recommended tire pressur e
( Y
page 258).
The tire pressur em onitor is no ta ble to warn you
of as udde nl oss of pressure, e.g. if th et ir ei s
penetrated by af oreign object. In th ee vent of a
sudde nl oss of pressure, brin gt he vehicl etoa
halt by braking carefully. Avoid abrup ts te ering
movements.
The tire pressur em onitor has ay ellow warning
lamp in th ei nstrumen tc luste rf or indicating
pressur el oss or am alfunction .W hether th e
warning lamp flashes or lights up indicates
whether at ir ep ressur eist oo low or th et ir e
pressur em onitor is malfunctioning :R
if th ew arning lamp is lit continuously, th et ir e
pressur eono ne or mor et ir es is significantly
to ol ow. The tire pressur em onitor is no tm al-
functioning . R
if th ew arning lamp flashes for aroun da
minute and then remain sl it constantly, th e
tire pressur em onitor is malfunctioning .Tire pressure 263
Wheels and tires Z

In addition to the warning lamp ,am essage
appears in the multifunction display. Observe
the information on display messages
( Y
page 196).
It may take up to ten minutes for am alfunction
of the tire pressure monitor to be indicated .A
malfunction wil lbei ndicated by the tire pres-
sure warning lamp flashing for approximately
one minute and then remaining lit. When the
malfunction has been rectified, the tire pressure
warning lamp goes out after af ew minutes of
driving.
The tire pressure values indicated by the on-
board computer may differ from those meas-
ured at ag as station with ap ressure gauge. The
tire pressures shown by the on-board computer
refer to those measured at sea level .Ath igh
altitudes, the tire pressure values indicated by a
pressure gauge are higher than those shown by
the on-board computer. In this case, do not
reduce the tire pressures.
The operation of the tire pressure monitor can
be affected by interference from radi ot ransmit-
ting equipment (e.g. radi oh eadphones, two-way
radios) that may be being operated in or near the
vehicle.
Checking the tire pressure electroni-
cally X
Make sure that the SmartKey is in position 2
in the ignition lock ( Y
page 115).X
Press the Y or e button on the steering
wheel to select the Serv. menu.X
Press the c or d button to select
Tire Pressure .X
Press the v button.
The current tire pressure of each tire is shown
in the multifunction display.
If the vehicle has been parked for over
20 minutes, the Tire pressure will be
displayed after driving af ew minutes
messag ea ppears.
After at each-in process, the tire pressure mon-
itor automatically detects new wheel sorn ew
sensors. As long as ac lear allocation of the tire
pressure valu etot he individual wheel sisn ot
possible, the Tire Pressure Monitor Active
display messag eiss hown instead of the tire
pressure display. The tire pressures are already
being monitored.
If an emergency spare wheel is mounted, the
system may continue to show the tire pressure of the wheel that has been removed for af ew
minutes. If this occurs, note that the valu ed is-
played for the positio nw here the spare wheel is
mounted is not the same as the current tire
pressure of the emergency spare wheel.
Tire pressure monitor warning mes-
sages If the tire pressure monitor detects ap ressure
loss in one or more tires, aw arning messag ei s
shown in the multifunction display. The yellow
tire pressure warning lamp then lights up. R
If the Please Correct Tire Pressure
messag ea ppears in the multifunction display,
the tire pressure in at least one tire is too low.
The tire pressure must be corrected when the
opportunity arises. R
If the Check Tires messag ea ppears in the
multifunction display, the tire pressure in at
least one tire has droppe ds ignificantly. The
tires must be checked. R
If the Warning Tire Malfunction message
appears in the multifunction display, the tire
pressure in at least one tire has droppe ds ud-
denly .T he tires must be checked.
Observe the instructions and safety notes in the
display messages in the "Tires" section
( Y
page 196).
If the wheel positions on the vehicle are rotated,
the tire pressures may be displaye df or the
wrong positions for as hort time. This is rectified
after af ew minutes of driving, and the tire pres-
sures are displaye df or the correct positions.
Restarting the tire pressure monitor When you restart the tire pressure monitor, all
existing warning messages are deleted and the
warning lamp sgoo ut. The monitor uses the cur-
rently set tire pressures as the reference values
for monitoring. In most cases, the tire pressure
monitor wil la utomatically detect the new refer-
ence values after you have changed the tire
pressure. However, you can also define refer-
ence values manually as describe dh ere. The tire
pressure monitor then monitors the new tire
pressure values. X
Set the tire pressure to the valu er ecommen-
ded for the corresponding driving situation on
the Tire and Loading Information placard on
the driver's side B-pilla r( Y
page 258).264
Tire pressure
Wheel sa nd tires