2018 MERCEDES-BENZ CLA engine

Safety systems Warning/
indicator
lamp Q Signal type
Possible causes/consequences and P Solutions
'M
Q ' (USA only), M (Canada only): the red brake system warning lamp is lit
while the engine is running. Aw arning tone also sounds.
G WARNING
The brake boosting effect is malfunctioning and the braking characteristics may be
affected.
There is ar isk of an accident.X
Pull over and stop the vehicle safely as soon as possible, paying attention to road
and traffic conditions. Do not continue driving under any circumstances. X
Secure the vehicle against rolling away ( Y
page 141).X
Consult aq ualified specialist workshop.X
Observe the additional display messages in the multifunction display.
'M
Q ' (USA only), M (Canada only): the red brake system warning lamp is lit
while the engine is running. Aw arning tone also sounds.
There is not enough brake fluid in the brake fluid reservoir.
G WARNING
The braking effect may be impaired.
There is ar isk of an accident.X
Pull over and stop the vehicle safely as soon as possible, paying attention to road
and traffic conditions. Do not continue driving under any circumstances. X
Secure the vehicle against rolling away ( Y
page 141).X
Do not add brake fluid. Adding more will not correct the malfunction. X
Consult aq ualified specialist workshop.X
Observe the additional display messages in the multifunction display.Warning and indicator lamp sint he instrument cluster 219
On-board computer and displays Z

Warning/
indicator
lamp Q Signal type
Possibl ec auses/consequences and P Solutions
%
Q The yellow ABS warning lamp is lit while the engine is running.
ABS (Anti-lock Braking System) is deactivated due to am alfunction. Therefore,
BAS (Brake Assist), Active Brake Assist, ESP ®
(Electronic Stability Program), the
HOLD function and hil ls tart assist, for example, are als od eactivated.
ATTENTION ASSIST is deactivated.
G WARNING
The brake system continues to function normally, but without the functions listed
above. The wheels coul dt herefore lock if you brake hard ,f or example.
The steerability and braking characteristics may be severely affected. The braking
distance in an emergency braking situation can increase.
If ESP ®
is not operational ,E SP ®
is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident. X
Observe the additiona ld isplay messages in the multifunction display.X
Drive on carefully. X
Visi taq ualified specialist worksho pi mmediately.
If the ABS control unit is faulty, there is als oap ossibility that other systems ,s uch
as the navigation system or the automatic transmission, wil ln ot be available.
%
Q The yellow ABS warning lamp is lit while the engine is running.
ABS is temporarily unavailable .T herefore, BAS, Active Brake Assist, ESP ®
,E BD
(electronic brake force distribution), the HOLD function and hil ls tart assist, for
example, are als od eactivated.
Possible causes are: R
Self-diagnosi sisn ot yet complete.R
The on-board voltag em ay be insufficient.
ATTENTION ASSIST is deactivated.
G WARNING
The brake system continues to function normally, but without the functions listed
above. The front and rear wheels coul dt herefore lock if you brake hard ,f or exam-
ple.
The steerability and braking characteristics may be severely affected. The braking
distance in an emergency braking situation can increase.
If ESP ®
is not operational ,E SP ®
is unable to stabilize the vehicle.
There is ar isk of an accident.X
Carefully drive as uitable distance, making slight steering movements at as peed
above 12 mph (20 km/h).
The functions mentioned above are available again when the warning lamp goes
out.
If the warning lamp is still on: X
Observe the additiona ld isplay messages in the multifunction display.X
Drive on carefully. X
Visi taq ualified specialist worksho pi mmediately.220
Warning and indicator lamps in the instrument cluster
On-board computer and displays

Warning/
indicator
lamp Q Signal type
Possibl ec auses/consequences and P Solutions
%
Q The yellow ABS warning lamp is lit while the engine is running. Aw arning tone
als os ounds.
EBD is malfunctioning. Therefore, ABS, BAS, Active Brake Assist, ESP ®
,t he HOLD
function and hil ls tart assist, for example, are not available either.
ATTENTION ASSIST is deactivated.
G WARNING
The brake system continues to function normally, but without the functions listed
above. The front and rear wheels coul dt herefore lock if you brake hard ,f or exam-
ple.
The steerability and braking characteristics may be severely affected. The braking
distance in an emergency braking situation can increase.
If ESP ®
is not operational ,E SP ®
is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident. X
Observe the additiona ld isplay messages in the multifunction display.X
Drive on carefully. X
Visi taq ualified specialist worksho pi mmediately.
%

Warning/
indicator
lamp Q Signal type
Possibl ec auses/consequences and P Solutions
$I
Q I (USA only), $ (Canada only): the red indicator lamp for the electric
parking brake flashes or lights up and/or the yellow warning lamp for the electric
parking brake lights up. X
Observe the additiona ld isplay messages in the multifunction display.
u
Q The red restraint system warning lamp is lit while the engine is running.
The restraint system is malfunctioning.
G WARNING
The air bag sorE mergency Tensioning Devices may either be triggere du ninten-
tionally or, in the event of an accident, may not be triggered.
There is an increased risk of injury. X
Observe the additiona ld isplay messages in the multifunction display.X
Drive on carefully. X
Contact aq ualified specialist worksho pa nd have the restraint system checked.
For further information about the restraint system, see ( Y
pag e4 0).
Engine Warning/
indicator
lamp Q Signal type
Possibl ec auses/consequences and P Solutions

Warning/
indicator
lamp Q Signal type
Possibl ec auses/consequences and P SolutionsX
At coolant temperatures below 248 ‡( 120 †), drive to the neares tq ualified
specialist workshop. X
Avoid heavy loads on the engine as you do so, e.g. driving in mountainous terrain
and stop-and-go traffic.
Driving systems Warning/
indicator
lamp Q Signal type
Possibl ec auses/consequences and P Solutions

Currently inactiv ea reas can be activated by text
message.
Triggering th ev ehicle alarmWit ht hi sf unction ,y ou can trigge rt he veh icle 's
pan ic alarm via text message. An alarm soun ds
and th ee xteri or lighting flashes. Depen din go n
th es etting, th ep an ic alarm last sf iv eort en sec-
onds. Afterwards, th ea larm swit ches off.
Garage door opener
General notes The HomeLink ®
garag ed oor opener integrated
in th er ear-view mirror allows you to operate up
to three diff erent door and gat es ystems.
Use th ei ntegrate dg arag ed oor opener on ly on
garag ed oor st ha t:R
have safety stop and revers ef eatures andR
mee tc urren tU .S .f ederal safety standards
Once programed, th ei ntegrate dg arag ed oor
opener in th er ear-view mirror will assum et he
function of th eg arag ed oor system' sr emote
control. Pleas ea lso read th eo peratin gi nstruc-
tions for th eg arag ed oor system.
When programmin gag arag ed oor opener, park
th ev eh icle out side th eg arage. Do no tl eave the
engin er unnin gw hile programming.
Certain garag ed oor driv es are incompatib le
wit ht he integrate dg arag ed oor opener. If you
have diff icult yp rograming th ei ntegrate dg arage
door opener, contact aM ercedes-Ben zS ervice
Center.
Alternatively, you can call th ef oll owin gt el e-
phon ea ssistance services:R
USA: Mercedes-Ben zC ustome rA ss istance
Cente rat1 -800-FOR -M ERCe desR
Canada: Custome rS ervic ea t
1-800-387-0100 R
HomeLink ®
hot lin e1 -800-355-351 5( free of
charge)
Mor ei nformatio nonH omeLink ®
and/or com-
pat ible product sisa lso availab le on lin ea t
http:/ /www. hom elin k.co m.
Notes on the declaration of conformity
( Y
page 27).
USA: FCC ID: CB2HMIHL4
Canada: IC: 279B-HMIHL4 Important safety notes
G WARNING
When you operate or program the garag ed oor
with the integrated garag ed oor opener, per-
sons in the range of movement of the garage
door can become trapped or struck by the
garag ed oor. There is ar isk of injury.
When using the integrated garag ed oor
opener, always make sure that nobody is
within the range of movement of the garage
door.
G WARNING
Combustion engines emit poisonou se xhaust
gases such as carbon monoxide. Inhaling
these exhaust gases lead stop oisoning. There
is ar isk of fatal injury. Therefore never leave
the engine running in enclosed spaces with-
out sufficient ventilation.
Programming
Programming the buttons Pay attention to the "Important safety notes"
( Y
page 252).
Garage door remote control

Engine compartment
Hood
Important safety notes
G WARNING
If th eh ood is unlatched, it may open up when
th ev ehicle is in motion and bloc ky our view.
Ther eisar isk of an accident.
Never unlatch th eh ood while driving .B efore
ever yt ri p, ensure that th eh ood is locked.
G WARNING
When opening and closin gt he hood ,itm ay
suddenly fall int ot he closed position .T her ei s
ar isk of injury to person sw ithin range of
movemen toft he hood.
Open and close th eh ood only when no on ei s
within its range of movement.
G WARNING
Opening th eh ood when th ee ngine is over-
heated or when there is af ir eint he engine
compartmen tc oul de xpose you to hot gases
or other servic ep roducts. Ther eisar isk of
injury.
Let an overheate de ngine coo ld own before
opening th eh ood .Ift he re is af ir eint he
engine compartment, keep th eh ood closed
and contac tt he fir ed epartment.
G WARNING
The engine compartmen tc ontain sm oving
components. Certain components, suc ha s
th er adiator fan ,m ay continue to run or start
again suddenly when th ei gnition is off .T here
is ar isk of injury.
If you nee dtodoa ny work inside th ee ngine
compartment: R
switch off th ei gnitionR
never reac hi nt ot he area wher et he re is a
risk of danger from moving components,
suc hast he fan rotatio na rea R
remove jewelry and watches R
keep items of clothing and hair, for exam-
ple, away from moving parts
G WARNING
The ignition system and th ef uel injection sys-
te mw ork unde rh igh voltage. If you touch
component sw hic ha re unde rv oltage, you
coul dg et an electric shock. Ther eisar isk of
injury.
Never touch component soft he ignition sys-
te morf uel injection system when th ei gnition
is switched on.
Opening th eh ood
G WARNING
Certain component sint he engine compart-
ment, suc hast he engine ,r adiator and parts
of th ee xhaust system, can become ver yh ot.
Workin gint he engine compartmen tp ose sa
risk of injury.
Wher ep ossible, let th ee ngine coo ld own and
touch only th ec omponent sd escribe dint he
following.
G WARNING
When th eh ood is open and th ew indshield
wiper sa re set in motion ,y ou can be injured by
th ew iper linkage. Ther eisar isk of injury.
Always switch off th ew indshield wiper sa nd
th ei gnition before opening th eh ood.
! Mak es ure that th ew indshield wiper sa re
no tf olded away from th ew indshield. You
coul do th erwise damag et he windshield wip-
ers or th eh ood.Engine compartment 257
Maintenance and care Z

X
Make sure that the vehicle is at as tandstill
and the SmartKey is in key position H in the
ignition lock. X
Open the camera cover for cleaning via the
multimedia system (see the separate operat-
ing instructions). X
To clean the rear view camera: use clear
water and as oft cloth to clean camera
lens C .
Cleanin gt he exhaust pipes
G WARNING
The exhaust tail pipe and tail pipe trim can
become very hot. If you come into contact
with these parts of the vehicle, you could burn
yourself. There is ar isk of injury.
Always be particularly careful around the
exhaust tail pipe and the tail pipe trim. Allow
these components to cool down before touch-
ing them.
! Do not clean the exhaust pipe with acid-
based cleaning agents, such as bathroom
cleaner or wheel cleaner.
! Mercedes-AMG vehicles with black exhaust
pipes: the black-chrome tailpipe finishers
should not be polished with ac hrome polish.
They will otherwise lose their black sheen. For
optimal care, the faceplates should be rubbed
with al ightly oiled cloth after every car wash.
Commercially available engine and care oils
are suitable for this.
For heavier soiling, you can apply af ine paint-
work polish with am icrofiber cloth. Remove
the excess polish residue after polishing.
Impurities combined with the effect sofr oad grit
and corrosive environmental factors may cause
flash rust to form on the surface. You can
restore the original shine of the exhaust pipe by
cleaning it regularly ,e specially in winter and
after washing. X
Clean the exhaust pipe with ac are product
tested and approved by Mercedes-Benz. Interior care
Cleanin gt he display
! For cleaning, do not use any of the following: R
alcohol-based thinner or gasoline R
abrasive cleaning agents R
commercially-availabl eh ousehold cleaning
agents
These may damage the display surface. Do
not put pressure on the display surface when
cleaning. This could lead to irreparable dam-
age to the display. X
Before cleaning the display ,m ake sure that it
is switched off and has cooled down. X
Clean the display surface using ac ommer-
cially available microfiber cloth and TFT/LCD
display cleaner. X
Dry the display surface using ad ry microfiber
cloth.
Cleanin gt he plastic trim
G WARNING
Care products and cleaning agents containing
solvents cause surfaces in the cockpit to
become porous. As ar esult, plastic parts may
come loose in the event of air bag deploy-
ment. There is ar isk of injury.
Do not use any care products and cleaning
agents to clean the cockpit.
! Never attach the following to plastic surfa-
ces: R
stickers R
films R
perfume oil container or similar
You could otherwise damage the plastic.
! Do not allow cosmetics, insect repellent or
sunscreen to come into contact with the plas-
tic trim. This maintains the high-quality look of
the surfaces. X
Wipe the plastic trim with ad amp, lint-free
cloth, e.g. am icrofiber cloth. X
Heavy soiling: use care and cleaning prod-
ucts recommended and approved by
Mercedes-Benz.
The surface may change color temporarily.
Wait until the surface is dry again.266
Care
Maintenance and care