2018 MERCEDES-BENZ CLA steering

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

ASSYS TP LUS
Service message The ASSYS TP LU Ss ervic ei nterval display
inform sy ou of th en ex ts ervic ed ue date.
You can fin di nformation on th et yp eofs ervic e
and servic ei ntervals in th eM aintenance Book -
let .
You can obtain further information from an
authorize dM ercedes-Benz Cente rora t
http://www.mbusa.co m( US Ao nl y).
i The ASSYS TP LU Ss ervic ei nterval display
does no ts ho wa ny information on th ee ng in e
oil level. Observ et he note sont he engin eo il
level ( Y
page 258).
The multifunction display shows as ervic em es -
sage for several seconds, e.g. :R
Servic eAin..d ay sR
Servic eAd ueR
Servic eAo verdu eby..d ay s
Dependin gont he operating condition soft he
vehicle, th er emaining time or distanc eu ntil th e
next servic ed ue dat eisd isplayed.
The lette r A or B ,p ossibl yinc onnectio nw it ha
number or another letter, indicates th et yp eo f
service. A stand sf or am inor servic ea nd B for a
major service.
You can obtain further information from an
authorize dM ercedes-Benz Center.
The ASSYS TP LU Ss ervic ei nterval display does
no tt ak ei nt oa ccoun ta ny periods of time during
whic ht he battery is disconnected.
Maintainin gt he time-dependen ts ervic es ch ed-
ule: X
Not ed own th es ervic ed ue dat ed isplayed in
th em ultifunction display before disconnect -
ing th eb attery.
or X
Afte rr econnecting th eb attery, subtrac tt he
battery disconnection periods from th es er -
vic ed at es hown on th ed isplay.
Hiding as ervice messageX
Press th e v or 8 butto nont he steering
wheel. Displaying service messages X
Switc hont he ignition .X
Press th e Y or e butto ntos elect th e
Serv. menu. X
Press th e c or d butto ntos elect th e
ASSYST PLU S submen ua nd confirm by press-
ing th e v button.
The servic ed ue dat ea ppear sint he multi-
function display.
Infor ma ti on abou tS ervice
Resetting th eA SSYS TP LUS service
interval display
! If th eA SS YS TP LU Ss ervic ei nterval display
has been inadvertentl yr eset ,t hi ss etting can
be correcte dataq ualified specialist work-
shop.
Hav es ervic ew or kc arrie do ut as described in
th eM aintenance Booklet .T his may otherwise
lead to increased wear and damag etot he
major assemblies or th ev ehicle.
Aq ualified specialist workshop ,e .g .ana uthor-
ized Mercedes-Benz Center, will reset th e
ASSYS TP LU Ss ervic ei nterval display after th e
servic ew or kh as been carrie do ut .Y ou can also
obtain further information on maintenance
work, for example.
Special service requirements The specifie dm aintenance interval takes only
th en orma lo peration of th ev ehicl ei nt o
account. Under arduous operating condition so r
increased load on th ev ehicle, maintenance
wor km us tbec arrie do ut mor ef re quently, for
example: R
regular cit yd rivin gw it hf re quen ti ntermediat e
stops R
if th ev ehicl eisp rimarily used to travel short
distances R
use in mountainous terrain or on poor road
surfaces R
if th ee ng in eiso ften lef ti dlin gf or lon gp eriodsR
in particularly dust yc onditi ons, or if air-recir-
culation mod eisf re quentl yu sed
In these or similar operating conditions, hav e
th ei nterior filter, engin ea ir cleaner, engin eo il
and oil filter, for example, changed mor ef re -ASSYST PLUS 261
Maintenance and care Z

system (Canad ao nly) or tire pressure monitor
(USA only).
If ap ressure loss warning message appears
in the multifunction display: R
observe the instructions in the displa ym es-
sages ( Y
page 211).R
check the tire for damage R
if driving on, observe the following notes
The driving distance possible in run-flat mode is
approximately 50 miles (80 km) when the vehi-
cle is partiall yl aden. When the vehicle is fully
laden it is approximately 19 miles (30 km).
In addition to the vehicle load, the driving dis-
tance possible depends upon: R
vehicle speed R
road condition R
outside temperature
The driving distance possible in run-flat mode
may be reduced by extreme driving conditions
or maneuvers, or it can be increased through a
moderate style of driving.
The driving distance possible in run-flat mode is
counted from the moment the tire pressure loss
warning appears in the multifunction display.
You must not exceed am aximum speed of
50 mph (80 km/h).
When replacing one or all tires, please observe
the following specifications for your vehicle's
tires: R
size R
type and R
the "MOExtended" marking
If at ire has gone flat and cannot be replaced
with aM OExtended tire, as tandard tire may be
used as at emporary measure. Make sure that
you use the proper size and type (summer or
winter tire).
Vehicles equipped with MOExtended tires are
not equipped with aT IREFIT kit at the factory. It
is therefore recommended that you additionally
equip your vehicle with aT IREFIT kit if you mount
tires that do not feature run-flat properties, e.g.
winter tires. AT IREFIT kit may be obtained from
aq ualified specialist workshop.
Important safety notes
G WARNING
When driving in emergency mode, the driving
characteristics deteriorate, e.g. when corner- ing, accelerating quickly and when braking.
There is ar isk of an accident.
Do not exceed the stated maximum speed.
Avoid abrupt steering and driving maneuvers,
and driving over obstacles (curbs, potholes,
off-road). This applies in particular to al aden
vehicle.
Stop driving in emergency mode if: R
you hear banging noises. R
the vehicle starts to shake. R
you see smoke and smell rubber. R
ESP ®
is intervenin gc onstantly.R
there are tears in the sidewalls of the tire.
After driving in emergency mode, have the
wheel rims checked at aq ualified specialist
workshop with regard to their further use. The
defective tire must be replaced in every case.
TIREFIT kit
Important safety notes TIREFIT is at ire sealant.
Only valid for USA: You can use TIREFIT to seal
punctures of up to 0.16 in (4 mm), particularly
those in the tire tread. You can use TIREFIT at
outside temperatures down to

Battery (vehicle)
Important safety notes Specia lt ool sa nd expert knowledg ea re required
when working on the battery ,e .g .r emova la nd
installation. Yo us houl dt herefore have al lw or k
involving the battery carrie do ut at aq uali fied
specialist workshop.
G WARNING
Wor kc arrie do ut incorrectly on the battery
can lead ,f or example, to as hort circui ta nd
thu sd amag et he vehicl ee le ctronics .T hi sc an
lead to functio nr estrictions applying to
safety-relevant systems, e.g the lighting sys-
tem, the ABS (anti-lock braking system )ort he
ESP ®
(Electronic Stability Program). The oper-
ating safety of your vehicl em ay be restricted.
Yo uc ould lose contro loft he vehicle, for
example: R
when braking R
in the event of abrupt steering maneuvers
and/or when the vehicle's speed is not
adapted to the roa dc onditions
There is ar is kofana ccident.
In the event of as hort circui tora similar inci-
dent, contact aq uali fied specialist workshop
immediately. Do not drive any further .Y ou
shoul dh av ea ll work involving the battery car-
rie do ut at aq uali fied specialist workshop.
For further informatio na bout ABS and ESP ®
,
see ( Y
page 61 )a nd ( Y
page 64).
G WARNING
Electrostati cb uild -u pc an lead to the creation
of sparks, which could ignite the highl ye xplo-
sive gases of ab at tery .T here is ar is kofa n
explosion.
Before handling the battery ,t ouch the vehicle
body to remove any existing electrostatic
build-up.
The highl yf lammabl eg as mixture form sw he n
charging the battery as well as when jump-start-
ing. Alway sm ak es ur et ha tn either yo un or the bat-
tery is electrostaticall yc harged. Ab uild -u po f
electrostatic charge can be caused ,f or exam-
ple: R
by wearing clothing made from synthetic
fibers R
du etof rictio nb et ween clothing and seatsR
if yo up us horp ul lt he battery across the car-
pe toro the rs yn theti cm at erialsR
if yo ur ub the battery with ac loth
G WARNING
During the charging process ,ab at tery produ-
ces hydrogen gas. If as hort circui to ccurs or
sparks are created ,t he hydrogen ga sc an
ignite .T here is ar is kofane xplosion.R
Make sure tha tt he positive terminal of a
connected battery does not come into con-
tact with vehicl ep ar ts.R
Never place meta lo bj ects or tool sonab at -
tery. R
It is important tha ty ou observe the descri-
be do rder of the battery terminal sw he n
connecting and disconnecting ab at tery.R
Whe nj ump-starting ,m ak es ur et ha tt he
battery pole sw it hi de ntical polarity are
connected. R
It is particularly important to observe the
describe do rder when connecting and dis-
connecting the jumper cables. R
Never connect or disconnect the battery
terminal sw hile the engine is running.
G WARNING
Battery aci disc austic .T here is ar is kofi njury.
Avoi dc ontact with skin, eyes or clothing. Do
not inhal ea ny battery gases .Don ot lean over
the battery .K ee pc hildren away from batter-
ies. Wash away battery aci di mmediatel yw it h
plenty of clean water and see km edica la tten-
tion.
H Environmental note
Batterie sc ontain dangerous
substances. It is against the
la wtod is pose of them with276
Battery (vehicle)
Breakdo wn assis tance

i Jumper cable sa nd further informatio nr egardin gj ump-startin gc an be obtaine data ny qualified
specialist workshop.
Towing and tow-starting
Important safety notes
G WARNING
Function sr elevan ttos afety are restricted or
no longer available if: R
th ee ngine is no tr unning.R
th eb rak es ystem or th ep ower steering is
malfunctioning. R
there is am alfunctio nint he voltage supply
or th ev ehicle's electrical system.
If your vehicle is bein gt ow ed, muc hm ore
force may be necessar yt os te er or brake.
Ther eisar isk of an accident.
In such cases, use at ow bar. Before towing,
mak es ure that th es te ering moves freely.
G WARNING
You can no longer steer th ev ehicle if the
steering wheel loc kh as been engaged. There
is ar isk of an accident.
Always switch off th ei gnitio nw hen towing the
vehicle with at ow cable or at ow bar.
G WARNING
When towing or tow-startin ga nother vehicle
and its weight is greater than th ep ermissible
gross weight of your vehicle ,t he :R
th et ow ing eye could detach itselfR
th ev ehicle/trailer combinatio nc ould roll-
over.
Ther eisar isk of an accident.
When towing or tow-startin ga nother vehicle,
its weight shoul dn ot be greater than th ep er-
missible gross weight of your vehicle.
Details on th ep ermissible gross vehicle weight
of your vehicle can be foun dont he vehicle iden-
tification plat e( Y
page 314).
! When Activ eB ra ke Assist ,D istance Pilot
DISTRONIC or th eH OL Df unction is activated, th ev ehicle brakes automatically in certain
situations.
To avoid damage to th ev ehicle ,d eactivate
these systems in th ef ollowing or similar sit-
uations: R
when towing th ev ehicle R
in th ec ar wash
! Mak es ure that th ee lectric parking brak ei s
released. If th ee lectric parking brak eisf aulty,
visi taq ualifie ds pecialist workshop.
! Only secure th et ow rope or to wb ar at the
towing eyes. Otherwise, th ev ehicle coul db e
damaged.
! Do no tu se th et ow ing eyes for recover yp ur-
pose sast hi sc oul dd amage th ev ehicle .Ifi n
doubt ,r ecover th ev ehicle with ac ra ne.
! When towing ,p ull away slowly and
smoothly. If th et ra ctive power is to oh igh ,t he
vehicle sc oul dbed amaged.
! The vehicle can be towed am aximum of
30 miles (50km). The t owing speed of 30 mph
(5 0km/h) must no tbee xceeded.
If th ev ehicle has to be towed mor et ha n
30 miles (50km), th ef ront axle must be raised
or th ee ntire vehicle raise da nd transported.
! Do no tt ow with sling-type equipment .T his
coul dd amage th ev ehicle.
! When towing vehicle sw ith KEYLESS-GO,
use th ek ey instead of th eS ta rt/Sto pb utton.
Otherwise, th ea utomatic transmission may
shif ttop osition P when th ed river' sorf ront -
passenger door are opened, whic hc oul dl ead
to damage to th et ra nsmission.
! Vehicles with automatic transmission must
no tbes ta rted by tow-starting. This coul do th -
erwis ed amage th et ra nsmission.
It is bette rtoh ave th ev ehicle transported than
to have it towed away.
If th ev ehicle can no longer be driven because of
an acciden torb reakdown ,y ou have th ef ollow-
ing options: R
Transportin gt he vehicle.Towing and tow-starting 281
Breakdown assistance Z

'OK' to Restart message in the multifunction
displa yint he Serv. menu. Information on the
message displa yc an be found in the "Restarting
the tire pressure loss warning" section
( Y
page 294).
Important safety notes The tire pressure warning system does not warn
you of an incorrectly set tire pressure. Observe
the notes on the recommended tire pressure
( Y
page 290).
The tire pressure loss warning does not replace
the need to regularly check the tire pressure. An
even loss of pressure on several tires at the
same time cannot be detected by the tire pres-
sure loss warning system.
The tire pressure monitor is not able to warn you
of as udden loss of pressure, e.g. if the tire is
penetrated by af oreign object. In the event of a
sudden loss of pressure, bring the vehicle to a
halt by braking carefully .A void abrupt steering
movements.
The function of the tire pressure loss warning
system is limited or delayed if: R
snow chains are mounted on your vehicle's
tires. R
road conditions are wintry. R
you are driving on sand or gravel. R
you adopt av ery sporty driving style (corner-
ing at high speeds or driving with high rates of
acceleration). R
you are driving with ah eavy load (in the vehi-
cle or on the roof)
Restarting the tire pressure loss warn-
ing system Restart the tire pressure loss warning system if
you have: R
changed the tire pressure R
changed the wheels or tires R
mounted new wheels or tires X
Before restarting, make sure that the tire
pressures are set properly on all four tires for
the respective operating conditions.
The recommended tire pressure can be found
on the Tire and Loading Information placard
on the B-pillar. Additionally ,at ire pressure
table is attached to the fuel filler flap. The tire
pressure loss warning system can only give
reliable warnings if you have set the correct tire pressure. If an incorrect tire pressure is
set, these incorrect value sw ill be monitored.X
Also observe the notes in the section on tire
pressures ( Y
page 290). X
Make sure that the SmartKey is in position H
in the ignition lock ( Y
page 122).X
Press Y or e 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 Run Flat Indicator Active Press
'OK' to Restart message appears in the
multifunction display.
If you wish to confirm the restart: X
Press the v button.
The Tire Pressure Now OK? message
appears in the multifunction display. X
Press the c or d button to select Yes .X
Press the v button.
The Run Flat Indicator Restarted mes-
sage appears in the multifunction display.
After at each-in period, the tire pressure loss
warning system will monitor the set tire pres-
sures of all four tires.
If you wish to cance lt he restart:X
Press the 8 button.
or X
If the Tire Pressure Now OK? message
appears, press the c or d button to
select Cancel . X
Press the v button.
The tire pressure value ss tored at the last
restart will continue to be monitored.
Tire pressure monitor (Canada only)
General notes If at ire pressure monitor is installed, the vehi-
cle's wheels have sensors that monitor the tire
pressures in all four tires. The tire pressure mon-
itor warns you if the pressure drops in one or
more of the tires. The tire pressure monitor only
functions if the corresponding sensors are
installed in all wheels.
Information on tire pressures is displayed in the
multifunction display. After af ew minutes of
driving, the current tire pressure of each tire is294
Tire pressure
Wheels and tires

shown in the Serv. menu of the multifunction
display, see illustration (example).
For information on the message display, refer to
the "Checking the tire pressure electronically"
section ( Y
page 296).
Important safety notes
G WARNING
Each tire, including the spare (if provided),
should be checked at least once every two
weeks when cold and inflated to the pressure
recommended by the vehicle manufacturer
on the Tire and Loading Information placard
on the driver's door B-pillar or the tire pres-
sure label on the inside of the fuel filler flap. If
your vehicle has tires of ad ifferent size than
the size indicated on the Tire and Loading
Information placard or, if available, the tire
pressure label ,y ou should determine the
proper tire pressure for those tires.
As an added safety feature, your vehicle has
been equipped with at ire pressure monitoring
system (TPMS) that illuminates al ow tire pres-
sure telltale when one or more of your tires
are significantly underinflated. Accordingly,
when the low tire pressure telltale lights up,
you should stop and check your tires as soon
as possible ,a nd inflate them to the proper
pressure. Driving on as ignificantly underin-
flated tire causes the tire to overheat and can
lead to tire failure.
Underinflation also reduces fuel efficiency
and tire tread life, and may affect the vehicle's
handling and stopping ability. Please note that
the TPMS is not as ubstitute for proper tire
maintenance, and it is the driver's responsi-
bility to maintain correct tire pressure, even if
underinflation has not reached the level to trigger illumination of the TPMS low tire pres-
sure telltale.
Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate when
the system is not operating properly. The
TPMS malfunction indicator is combined with
the low tire pressure telltale. When the sys-
tem detects am alfunction, the warning lamp
will flash for approximately am inute and then
remain continuously illuminated. This
sequence will be repeated every time the vehi-
cle is started as long as the malfunction
exists. When the malfunction indicator is illu-
minated, the system may not be able to detect
or signal low tire pressure as intended.
TPMS malfunctions may occur for av ariety of
reasons, including the installation of incom-
patible replacement or alternate tires or
wheels on the vehicle that prevent the TPMS
from functionin gp roperly. Always check the
TPMS malfunction telltale after replacing one
or more tires or wheels on your vehicle to
ensure that the replacement or alternate Tires
and wheels allow the TPMS to continue to
function properly.
It is the driver's responsibility to set the tire
pressure to that recommended for cold tires
which is suitable for the operating situation
( Y
page 290). Note that the correct tire pressure
for the current operating situation must first be
taught-in to the tire pressure monitor. If as ub-
stantial loss of pressure occurs, the warning
threshold for the warning message is aligned to
the taught-in reference values. Restart the tire
pressure monitor after adjusting the pressure of
the cold tires ( Y
page 297). The current pres-
sures are saved as new reference values. As a
result, aw arning message will appea rift he tire
pressure drops significantly.
The tire pressure monitor does not warn you of
an incorrectly set tire pressure. Observe the
notes on the recommended tire pressure
( Y
page 290).
The tire pressure monitor is not able to warn you
of as udden loss of pressure, e.g. if the tire is
penetrated by af oreign object. In the event of a
sudden loss of pressure, bring the vehicle to a
halt by braking carefully .A void abrupt steering
movements. Tire pressure 295
Wheels and tires Z

Restarting the tire pressure monitor Whe ny ou restart the tire pressure monitor, all
existing warning messages are deleted and the
warning lamps go out. The monitor uses the cur-
rentl ys et tire pressures as the reference values
for monitoring. In most cases, the tire pressure
monitor will automaticall yd etect the new refer-
ence value sa fte ry ou have changed the tire
pressure. However, yo uc an also set reference
value sm anually as described here. The tire
pressure monitor then monitors the new tire
pressure values. X
Set the tire pressure to the value recommen-
ded for the corresponding driving situation on
the Tire and Loading Information placard on
the driver' ss id eB -pillar ( Y
page 290).
Yo uc an find more tire pressure value sf or
various operating conditions in the tire pres-
sure table inside the fue lf ille rf lap
( Y
page 139). X
Make sure that the tire pressure is correct on
al lf ou rw he els.X
Make sure that the SmartKey is in position H
in the ignition lock ( Y
page 122).X
Press Y or e 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 multifunction display shows the current
tire pressure for each tire or the Tire pres‐
sure will be displayed after driving
af ew minutes message.X
Press the d button.
The multifunction display shows the Use
Current Pressure sasN ew Reference
Values message.
If you wish to confirm the restart: X
Press the v button.
The Tire Press. Monitor Restarted mes-
sage appears in the multifunction display.
After driving for af ew minutes, the system
checks whethe rt he current tire pressures are
within the specified range. The new tire pres-
sures are then accepted as reference values
and monitored.
If you wish to cance lt he restart:X
Press the 8 button.
The tire pressure value ss tore datt he last
restart will continu etobem onitored. Radio type approval for the tire pres-
sure monitor Country Radio type approval number
USA FCC ID: MRXMW2433A
FCCIC ID:MRXGG4 Thi sd evice
complies with part 15 of the FCC
rules and with license exempt
RSS standard sofI ndustry Can-
ada. Operation is subject to the
following conditions .( 1) This
device may not cause harmful
interference, and (2) Thi sd evice
mus ta ccept any interference
received, including interference
that may cause undesired oper-
ation. Le present apparei le st
conforme d'industri eC an ada
applicables au xa pp ereils radio
exempts de licence. L'exploita-
tion est authorisee au xd eu xc on-
ditions suivantes. (1) .L 'appareil
ne doi tp as produire de brouil-
lage, et (2) L'autisatue rdel 'ap-
parei ld oi ta ccepter tou tb rouil-
lage radioelectriqu es ubi, meme
si le brouillag ee st susceptible
d'e nc ompromettre le fonc-
tionnement. WARNING :C ha nges
or modifications not expressively
approved by the party responsi-
bl ef or compliance could voi dt he
users authority to operate the
equipment. The term "IC:" before
the radio certification number
only signifies Canad at echnical
specifications were met.
FCC ID:MRXMC34MA4 This
device complies with part 15 of
the FCC rules and with license
exempt RSS standard sofI ndus-
try Canada. Operation is subject
to the following conditions .( 1)
Thi sd evice may not cause harm-
ful interference, and (2) This
device mus ta ccept any interfer-
ence receive d, i ncluding interfer-
e nce that may cause undesired
operation. Le present appareil
est conforme d'industri eC an ada
applicables au xa pp ereils radio
exempts de license .L 'exploita-
tion est authorisee au xd eu xc on-
ditions suivantes. (1) .L 'appareilTire pressure 297
Wheel sa nd tires Z