warning light MERCEDES-BENZ C CLASS 2018 Manual Online

Engine
Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
;NThe yellow Check Engine warning lamp lights up while the engine is running.
There may be a malfunction, for example:
Rin the engine management
Rin the fuel injection system
Rin the exhaust system
Rin the ignition system (for vehicles with gasoline engines)
Rin the fuel system
The emission limit values may be exceeded and the engine may be in emergency
mode.
XVisit a qualified specialist workshop immediately.
In some states, you must immediately visit a qualified specialist workshop as soon as the yellow Check Engine warning lamp lights up. This is due to the legal require-
ments in effect in these states. If in doubt, check whether such legal regulations
apply in the state in which you are currently driving.
Vehicles with a diesel engine: the fuel tank has been run dry (
Ypage 158).
XStart the engine three to four times after refueling.
If the yellow Check Engine warning lamp goes out, emergency running mode is
canceled. The vehicle need not be checked.
8N The yellow reserve fuel warning lamp lights up while the engine is running.
The fuel level has dropped into the reserve range.
XRefuel at the nearest gas station.
8N The yellow reserve fuel warning lamp flashes while the vehicle is in motion.
In addition, the ;Check Engine warning lamp may light up.
The fuel filler cap is not closed correctly or the fuel system is leaking.
XCheck that the fuel filler cap is correctly closed.
XIf the fuel filler cap is not correctly closed: close the fuel filler cap.
XIf the fuel filler cap is closed:visit a qualified specialist workshop.
?NThe red coolant warning lamp lights up while the engine is running and the
coolant temperature gauge is at the start of the scale.
The temperature sensor for the coolant temperature gauge is malfunctioning.
The coolant temperature is no longer being monitored. There is a risk of engine
damage if the coolant temperature is too high.
XPull over and stop the vehicle safely and switch off the engine, paying attention
to road and traffic conditions. Do not continue driving under any circumstances.
XSecure the vehicle against rolling away (Ypage 161).
XConsult a qualified specialist workshop.
Warning and indicator lamps in the instrument cluster265
On-board computer and displays
Z

Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
XIf the coolant temperature is below the red marking, drive to the nearest quali-
fied specialist workshop.
XAvoid heavy loads on the engine as you do so, e.g. driving in mountainous terrain
and stop-and-go traffic.
Driving systems
Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
·NThe red distance warning lamp lights up while the vehicle is in motion. A warning
tone also sounds.
You are approaching a vehicle, a pedestrian or a stationary obstacle in your line of travel at too high a speed.
XBe prepared to brake immediately.
XPay careful attention to the traffic situation. You may have to brake or take
evasive action.
Further information about Active Brake Assist with cross-traffic function
(
Ypage 73).
Further information on the distance warning function of Active Brake Assist
(
Ypage 67).
Warning and indicator lamps in the instrument cluster267
On-board computer and displays
Z

General notes
The multimedia system section in this Opera-
tor's Manual describes the basic principles for
operation. More information can be found in theDigital Operator's Manual.
Important safety notes
GWARNING
If you operate information systems and com-
munication equipment integrated in the vehi-
cle when driving, you may be distracted from
the traffic situation. You could also lose con-
trol of the vehicle. There is a risk of an acci-
dent.
Only operate this 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 legal requirements for the
country in which you are currently driving when
operating the multimedia system.
The multimedia system calculates the route to
the destination without taking the following into
account, for example:
Rtraffic lights
Rstop and yield signs
Rparking or stopping restrictions
Rroad narrowing
Rother road and traffic rules and 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:
Ra diverted route
Rthe road layout or the direction of a one-way
street has been changed
For this reason, you must always observe road
and traffic rules and regulations during your
journey. Road and traffic rules and regulations
always have priority over multimedia system
driving recommendations. Navigation announcements are intended to
direct you while driving without diverting your
attention from the road and driving.
Please always use 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 radio frequency (RF)
Exposure Guidelines in Supplement C to OET65.
This equipment has very low levels of RF energy
that is deemed to comply without maximum
permissive exposure evaluation (MPE). How-
ever, it is
recommended to insta

ll it at a distance
of at least 8 inches (approx. 20 cm) between the
radiation source and a person's body (not
including limbs such as hands, wrists, feet and
legs).
GWARNING
Modifications to electronic components, their software as well as wiring 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. There is an increased risk of an
accident and injury.
Never tamper with the wiring as well as elec-
tronic components or their software. You
should have all work to electrical and elec-
tronic equipment carried out at a qualified
specialist workshop.
Function restrictions
For safety reasons, some functions are restric-
ted or unavailable while the vehicle is in motion.
You will notice this, for example, because either
you will not be able to select certain menu items
or a message will appear to this effect.
270Function restrictions
Multimedia system

Depending on the vehicle's equipment, the fol-
lowing may be in the stowage space:
Ran SD card slot
Ra multimedia connector unit with two USB
ports, e.g. for iPod®, iPhone®or MP3 player
(see the Digital Operator's Manual)
Ra mobile phone bracket
Ra small stowage space in the upper front sec-
tion
Stowage compartment in the doors
You can store items such as a rolled-up fluores-
cent jacket (driver's door) and the vehicle docu-
ment wallet (front-passenger door) in stowage
space :in the doors.
In doors ;, you can store bottles with a capa-
city of up to 34 fl. oz. (1.0 l).
Stowage space in the rear
Stowage compartment in the rear seat
armrest
!Do not sit on or support your body weight on
the rear seat armrest when it is folded down,
as you could otherwise damage it.
!Close the cover of the stowage compart-
ment before folding the rear seat armrest
back into the seat backrest.
XTo open: fold down the seat armrest.
XPress on the front of release catch :and fold
the cover of the armrest upwards.
Additional stowage space
Depending on the equipment, the following
additional stowage areas are available in the
vehicle:
Rcard and coin holder in the dashboard above
the light switch (not suitable for holding thin
objects such as shopping tokens)
Rthe open stowage compartment in the center
console
Rstowage net in the front-passenger footwell
Rthe map pockets on the back of the driver's
and front-passenger seat
Rparcel nets on the left-hand and right-hand
side in the trunk
Observe the loading guidelines (
Ypage 280)
and the safety notes regarding stowage spaces
(
Ypage 280).
Ski and snowboard bag
Important safety notes
GWARNING
The skibag in conjunction with the lashing
straps cannot restrain any objects other than
skis.
282Stowage areas
Stowage and features

Folding the rear seat backrests forward
XVehicles without memory function:if neces -
sary, mov eth edriver' sor front-passenger
seat forward.
XVehicles wit hmemory function :when on eor
bot hpart sof th erear seat backrest are folded
forward, th erespective fron tseat moves
forward slightly, when necessary, in order to
avoi dcontact .
XOpen th etrunk .
XFullyinsert th erear seat backrest head
restraints .
Leftand right seat backrest
XPull right-hand or left-han drear seat backrest
release handle :.
The corresponding rear seat backrest is
released.
Middle rear seat backrest
XPull release leve r= forwards .
Rear seat backrest ;is released.
XFold corresponding rear seat backrest ;
forward.
XMov eth edriver' sor front-passenger seat
bac kif necessary.
Folding the rear seat backrest back
!Mak esure that th eseat belt does no t
become trapped when foldin gth erear seat
backrest back. Otherwise, it could be dam-
aged.
Lef tand right seat backrest
XMov eth edriver' sor front-passenger seat
forward if necessary.
XFold rear seat backrest :bac kuntil it
engages.
If th erear seat backrest is no tengage dand
locked, this will be shown in th emultifunction
display in th einstrumen tcluster. Awarning
tone also sounds.
284Stowage areas
Stowage and features

Middle rear seat backrest
XMove the driver's or front-passenger seat
forward if necessary.
XFold seat backrest:back until it engages.
Red lock status indicator ;is no longer visi-
ble.
XAdjust the head restraints if necessary
(Ypage 103).
XMove the driver's or front-passenger seat
back if necessary.
You should always engage the rear seat backr-
ests if you do not need the through-loading fea-
ture. This will prevent unauthorized access to
the trunk from the vehicle interior.
Locking the center rear seat backrest
In order to prevent the trunk from being
accessed by unauthorized persons, the center
seat backrest can be locked using a catch. The
center seat backrest can only be folded forward
together with the left seat backrest.
XTo lock: fold the left and center seat backr-
ests forward. Make sure that the center and
left seat backrests are engaged and joined
together.
XSlide catch :upwards.
XTo unlock: fold the left and center seat backr-
ests forward.
XSlide catch :downwards.
Securing loads
Cargo tie-down rings
Observe the following notes on securing loads:
RObserve the loading guidelines (Ypage 280).
RSecure the load using the cargo tie-down
rings.
RDistribute the load on the cargo tie-down
rings evenly.
RDo not use elastic straps or nets to secure a
load, as these are only intended as an anti-slip protection for light loads.
RDo not route tie-downs across sharp edges orcorners.
RPad sharp edges for protection.
Vehicles with the through-loading feature in the
rear bench seat:
XFold up the carpet around the rear seat back-
rest.
XFold up the front cargo tie-down rings and
insert them through the slot in the carpet.
Bag hook
GWARNING
The bag hooks cannot restrain heavy objects
or items of luggage. Objects or items of lug-
gage could be flung around and thereby hit
vehicle occupants when braking or abruptly
changing directions. There is a risk of injury.
Stowage areas285
Stowage and features
Z

Only hang light objects on the bag hooks.
Never hang hard, sharp-edged or fragile
objects on the bag hooks.
!The bag hook can bear a maximum load of
6.6lbs (3kg) and should not be used to secure
a load.
:Bag hook
Parcel net
Important safety notes
GWARNING
If objects in the passenger compartment are
stowed incorrectly, they can slide or be
thrown around and hit vehicle occupants. In
addition, cupholders, open stowage spaces
and mobile phone brackets cannot always
retain all objects they contain. There is a risk of injury, particularly in the event of sudden
braking or a sudden change in direction.
RAlways stow objects so that they cannot be
thrown around in such situations.
RAlways make sure that objects do not pro-
trude from stowage spaces, parcel nets or
stowage nets.
RClose the lockable stowage spaces before
starting a journey.
RAlways stow and secure heavy, hard, poin-
ted, sharp-edged, fragile or bulky objects in
the trunk.
Observe the following notes:
RObserve the loading guidelines (Ypage 280).
Attaching the parcel net
XVehicles with rear bench seat through-
loading facility: fold up the front cargo tie-
down rings and push them through the slots in
the carpet.
XAttach parcel net :to the front and rear
cargo tie-down rings.
EASY-PACK trunk box
Important safety notes
GWARNING
When the floor moves up, your hands may
become trapped on the frame of the EASY-
PACK trunk box and objects may be flung
upwards. There is a risk of injury.
When the floor moves up, make sure that your
hands are not within the movement area of
the floor. If someone becomes trapped, care- fully push the center of the floor down. Before
the floor moves up, move all objects from the
floor.
!When the EASY-PACK trunk box is exten-
ded, objects may neither be placed on the
frame of the box nor pushed down onto the
frame from above. The box may otherwise be damaged.
!Sharp-edged, pointed or fragile objects can
damage the EASY-PACK trunk box and may be
thrown out. There is a risk of injury.
Do not transport sharp-edged, pointed or
fragile objects in the EASY-PACK trunk box.
Always store and secure these or similar
objects in the trunk outside the EASY-PACK
trunk box.
286Stowage areas
Stowage and features

vent the handle flap from protruding. Other-
wise, you could damage the handle.
XTo open:pull handle :up.
XHook handle :into rain trough ;.
Roof carrier
Important safety notes
GWARNING
When you load the roof, the center of gravity
of the vehicle rises and the driving character-
istics change. If you exceed the maximum roof
load, the driving characteristics, as well as
steering and braking, will be greatly impaired.
There is a risk of an accident.
Never exceed the maximum roof load and
adjust your driving style.
You will find information on the maximum roof
load in the "Technical data" section
(
Ypage 367).
!Mercedes-Benz recommends that you only
use roof carriers that have been tested and approved for Mercedes-Benz vehicles. This
helps to avoid damage to the vehicle.
Position the load on the roof carrier in such a
way that the vehicle will not sustain damage
even when it is in motion.
Depending on the vehicle equipment, ensure
that when the roof carrier is installed you can:
Rraise the sliding sunroof/panorama roof
with power tilt/sliding panel fully
Ropen the trunk lid fully
!To avoid damaging or scratching the covers,
do not use metallic or hard objects to open
them.
An incorrectly secured roof carrier or roof load
may become detached from the vehicle. You
must therefore ensure that you observe the roof carrier manufacturer's installation instructions.
Vehicles with a panorama roof with power
tilt/sliding panel: the panorama roof with
power tilt/sliding panel cannot be opened if a
roof carrier is installed. The panorama roof with power tilt/sliding panel can still be raised to
allow ventilation of the vehicle interior. If the
panorama roof with power tilt/sliding panel
makes contact with a roof carrier approved by
Mercedes-Benz, the sunroof will lower slightly
but remain raised at the rear.
Attaching the roof carrier
XCarefully open covers :in the direction of
the arrow and fold upwards.
XOnly secure the roof carrier to the anchorage points under covers :.
XObserve the manufacturer's installation
instructions.
288Stowage areas
Stowage and features

Features
Cup holder
Important safety notes
GWARNIN G
The cup holder canno thold acontainer secure
whils ttraveling .If you use acup holder whils t
traveling ,th econtainer may be flun garoun d
and liquid may be spilled. The vehicl eoccu-
pants may come int ocontact wit hth eliquid
and if it is hot ,they may be scalded. You may
be distracte dfrom th etraffic condition sand
you could lose control of th evehicle. Ther eis
a ris kof an acciden tand injury.
Only use th ecup holder when th evehicl eis
stationary. Only use th ecup holder for con-
tainers of th eright size. Always close th econ-
tainer, particularly if th eliquid is hot .
GWARNING
If object sin th epassenger compartmen tare
stowed incorrectly, they can slide or be
thrown aroun dand hit vehicl eoccupants. In
addition ,cupholders, open stowage spaces
and mobile phon ebrackets canno talways
retain all object sthey contain .Ther eis aris k
of injury, particularly in th eevent of sudde n
braking or asudde nchang ein direction .
RAlways stow object sso that they canno tbe
thrown aroun din suc hsituations.
RAlways mak esure that object sdo no tpro -
trude from stowage spaces, parcel nets or
stowage nets .
RClose thelockable stowage spaces before
starting ajourney.
RAlways stow and secure heavy, hard ,poin -
ted, sharp-edged, fragile or bulk yobject sin
th etrunk .
!Only use th ecup holders for containers of
th eright siz eand whic hhave lids. The drinks
could otherwise spill .
!Do notexpos edrinks bottles in th ecup
holder in th ecente rconsole to continuous,
stron gand direct sunlight. The passenger
compartmen tin th earea of th ecente rcon- sole can otherwise be damaged by th
econ-
centrate dand reflecte dsunlight.
Observ eth eloadin gguidelines (
Ypage 280).
Cup holder in the front center console
If you remove th ecup holder insert ,you can use
th eresulting compartmen tfor stowage .
XTo open:open th estowage compartmen t
(Ypage 281).
XTo remove: slide catch=forward and pull
out cup holder ;.
XTo insert:insert cup holder ;and slide bac k
catch =.
XTo close: push cover :of th estowage com-
partmen tclosed.
You can remove th ecup holder' srubber mat for
cleaning. Clean wit hclear, lukewarm water only.
Cup holder in the rear seat armrest
!Do no tsit on or support your body weigh ton
th erear seat armres twhen it is folded down ,
as you could otherwise damag eit.
!Close th ecup holder before foldin gth erear
seat armres tup. Otherwise, th ecup holder
could be damaged.
Features289
Stowage and features
Z

XFold down the rear seat armrest.
XTo open:press the front of cup holder :
or ;.
Cup holder :or; extends automatically.
XTo fold out: place a container in the cup
holder.
The cup holder :or; folds down automat-
ically.
XTo fold in: remove the container.
The cup holder :or; folds in automati-
cally.
XTo close: slide cup holder :or; back until
it engages.
Sun visors
Overview
GWARNING
If the mirror cover of the vanity mirror is folded
up when the vehicle is in motion, you could be
blinded by incident light. There is a risk of an
accident.
Always keep the mirror cover folded down
while driving.
:Mirror light
;Retainer
=Retaining clip, e.g. for a car park ticket
?Vanity mirror
AMirror cover
Vanity mirror in the sun visor
Mirror light :only functions if the sun visor is
clipped into bracket ;and mirror cover Ahas
been folded up.
Glare from the side
XFold down the sun visor.
XPull sun visor :out of retainer ;.
XSwing sun visor :to the side.
XSlide sun visor :horizontally as required.
Rear side window roller sunblinds
!
Always guide the roller sunblind by hand. Do
not let it snap back suddenly as this would
damage the automatic roller mechanism.
!Do not drive the vehicle with the roller sun-
blind hooked in and the side windows opened
simultaneously. The roller sunblind can jump
out of the retainers and spring back suddenly
when driving at high speeds, e.g. when driving
on the freeway. This could damage the inertia
reel. Therefore, either close the side window
or retract the roller sunblind before driving at
high speeds.
XTo extend: pull the roller sunblind out by
tab :and hook it onto retainers ;at the top
of the window.
290Features
Stowage and features