ECU MERCEDES-BENZ CLA 2018 Service Manual

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

Tires Warning/
indicator
lamp Q Signal type
Possible causes/consequence sa nd P Solutions
w
Q The yellow tire pressure monitor warning lamp (pressure loss/malfunction) is lit.
The tire pressure monitor ha sd et ecte dal os sofp ressure in at leas to ne of the tires.
G WARNING
Tire pressures tha ta re too lo wp os et he following hazards:R
the ym ay burst, especially as the load and vehicl es peed increaseR
the ym ay wear excessivel ya nd/or unevenly, which ma yg reatl yi mpai rt ire trac-
tion. R
the drivin gc haracteristics, as well as steerin ga nd braking ,m ay be greatly
impaired
There is ar is kofana ccident.X
Stop the vehicl ew it hou tm ak ing any sudden steerin gorb raking maneuvers. Pay
attentio ntot he traffi cc onditions as yo udos o.X
Secure the vehicl ea gain st rolling away ( Y
page 141).X
Observe the additional displa ym essage sint he multifunctio nd isplay .X
Check the tire sa nd ,ifn ecessary ,f ollo wt he instructions for af la tt ire
( Y
page 271). X
Check the tire pressure ( Y
page 294).X
If necessary ,c orrect the tire pressure.
w
Q The yellow tire pressure monitor warning lamp (pressure loss/malfunction)
flashe sf or approximately one minute and the nr emains lit.
The tire pressure monitor is faulty.
G WARNING
The system is possibl yu nabl etor ecognize or register lo wt ire pressure.
There is ar is kofana ccident.X
Observe the additional displa ym essage sint he multifunctio nd isplay .X
Visi taq uali fied specialis tw or kshop immediately.228
Warning and indicator lamps in the instrument cluster
On-board computer and displays

Connecting am obile phone
(COMAND)
Requirements For telephony via th eB luetooth ®
interface, you
require aB luetooth ®
-capable mobile phone. The
mobile phon em ust support Hands-Free Profile
1. 0ora bove.
Multimedia system: X
Select Vehicle { Sy stem Set‐
tings { Activate Bluetooth .X
Activate Bluetooth ®
s .
Mobil ep hone:X
Activate Bluetooth ®
and ,ifn ec essary, Blue-
tooth ®
visibilit yf or other devices (see the
manufacturer' so peratin gi nstructions).
The Bluetooth ®
device names for all of on em an-
ufacturer' sp roduct sm igh tbei dentical. To
mak eitp ossible to clearly identif yy our mobile
phone, chang et he device nam e( see th em an-
ufacturer' so peratin gi nstructions).
If th em obile phon es upport st he PBA P( P hone
B oo k A ccess P rofile) and MA P( M essage
A cc ess P rofile )B luetooth ®
profiles, th ef ollow-
ing informatio nw ill be transmitte da fter you
connect: R
Phon eb ookR
Call lists R
Tex tm essages and e-mail
i Further informatio nons uitable mobile
phones can be foun da t: http://
www.mercedes-benz.com/connect
i In th eU SA ,y ou can get in touch wit ht he
Mercedes-Ben zC ustome rA ss istanc eC enter
on 1-800-FOR-MERCedes (1-800-367-6372 ).
In Canada, you can get in touch with the Cus-
tomer Relations Center on 1-800-387-0100.
Searchin gf or and authorizing (connect-
ing) am obile phone
Before using you rm obil ep hone with the multi-
media system for the first time, you wil ln eed to
search for the phone and then authorize (con-
nect) it. Depending on the mobil ep hone, author-
ization either takes place by means of Secure
Simple Pairing or by entering ap asskey .T he
multimedia system automatically makes the procedure that is relevant for you rm obil ep hone
available. The mobil ep hone is always connec-
ted automatically after authorization. Further
information on using am obil ep hone with the
multimedia system (see the Digital Operator's
Manual).
If the multimedia system does not detect your
mobil ep hone, this may be due to particular
security settings on you rm obil ep hone (see the
manufacturer's operating instructions).
Only one mobil ep hone can be connected to the
multimedia system at any one time.
Searchin gf or am obile phone
Multimedia system: X
Select Tel/

Authorization by entering ap as ske y( pass code):X
Select the Bluetooth ®
nam eoft he mobile
phone.
The input menu for the passke yisd is played.X
Choos eao ne to sixteen-digi tn umbe rc ombi-
nation as ap as skey.X
Enter the passke yont he multimedia system.X
Press T to confirm.X
Enter and confirm the passke yont he mobile
phone. Depending on the mobil ep hone used,
confirm the connectio ntot he multimedia sys-
tem and for the PBAP and MAP Bluetooth ®
profiles. The prompt to confirm ma yt ake up
to two minutes to be displayed (se et he man-
ufacturer's operating instructions).
Connectin gam obil ep hon e( Au dio 20)
Requirements For telephony via the Bluetooth ®
interface, you
require at leas to ne Bluetooth ®
-capable mobile
phone depending on us eo f one-telephone
mode or two-telephon em ode .T he mobile
phone must support Hands-Fre eP rofil e1 .0 or
above.
In two-telephon em ode yo uc an us ea ll the
functions of the multimedia system with the
main telephone .W it ht he additional tele-
phone ,y ou can receive incoming calls.
Multimedia system: X
Select Vehicle { Sy stem Set‐
tings { Activate Bluetooth .X
Activate Bluetooth ®
s .
Mobil ep hone:X
Activate Bluetooth ®
and ,ifn ecessary ,B lue-
tooth ®
visibility for othe rd ev ice s( se et he
manufacturer's operating instructions).
The Bluetooth ®
device names for al lofo ne man-
ufacturer's products might be identical .T o
make it possibl etoc learly identify your mobile
phone, change the device nam e( se et he man-
ufacturer's operating instructions). If the mobil ep hone supports the PBAP ( P hone
B ook A ccess P rofile )a nd MAP ( M es sage
A ccess P rofile) Bluetooth ®
profiles, the follow-
ing informatio ni st ransmitte da fte ry ou connect
the main telephone: R
Phone book R
Call lists R
Text messages and e-mail
i Further informatio nons ui tabl em obile
phones can be found at: http://
www.mercedes-benz.com/connect
i In the USA, yo uc an ge tint ouch with the
Mercedes-Benz Customer Assistance Center
on 1-800-FOR-MERCedes (1-800-367-6372).
In Canada, yo uc an ge tint ouch with the Cus-
tome rR elat ions Center on 1-800-387-010 0.
Searching for and authorizing (connect-
ing) am obile phoneBefore using your mobile phone with the multi-
media system for the first time, you will need to
search for the phone and then authorize (con-
nect )i t. Depending on the mobile phone, author-
ization either takes place by means of Secure
Simple Pairing or by enterin gap asskey. The
multimedia system automatically makes the
procedure that is relevant for your mobile phone
available. The mobile phone is always connec-
ted automatically after authorization. Further
information on using am obile phone with the
multimedia system (see the Digital Operator's
Manual).
If the multimedia system does not detect your
mobile phone, this may be due to particular
security settings on your mobile phone (see the
manufacturer's operating instructions).
Searching for am obile phone
Multimedia system: X
Select Tel/

X
Authorizatio nu sin gS ecur eS imple Pai r-
ing:
Ac od eisd ispl ayed in th em ultimed ia system
and on th em ob ile phone.X
Confir mc od eont he mob ile phone. Depen d-
ing on th em ob ile phon eu sed, confirm the
connection to th em ultimed ia system and for
th eP BA Pa nd MA PB luetooth ®
pro file s. The
prompt to confirm may tak euptot wo
minute stobed ispl ayed (see th em anufactur-
er' so peratin gi nstructions).X
If th ec od es are diff erent :s elect No on the
multimed ia system.
The proces sisc anceled.
Repeat authorization.
or X
Authorizatio nbye ntering ap as skey
(passcode): ente ra ny one- to sixteen-digit
number sequenc ew hic hy ou have chosen
yourself int ot he passke yi nput menu.X
Press T to confirm.X
Ente ra nd confirm th ep asske yo nt he mob ile
phone. Depen din gont he mob ile phon eu sed,
confirm th ec onnectio ntot he multimed ia sys-
te ma nd for th eP BA Pa nd MA PB luetooth ®
pro file s. The prompt to confirm may tak eu p
to two minute stobed ispl ayed (see th em an-
ufacturer' so peratin gi nstructions).
Symbols in th ed evice managerThe symbols are sho wn in color depen din go n
their use.
Symbol Explanation
Mobi le phon ec onnected to the
multimed ia system
Main telephone wit hf ull range of
functions
Ad dit ional telephone for incoming
calls in two telephone mode
Media mode
General notes
If you wish to play external medi as ources ,t he
appropriat em edi am od em ust alread ybet urned on .F urther informatio nonm edi am od e( see the
Digital Operator's Manual).
The followin ge xterna lm edi as ources can be
used: R
Apple ®
device s( e.g. iPhone ®
)R
US Bd evice s( e.g. US Bs ti ck ,M P3 player)
( Y
page 236) R
CD R
DV D( COMAND) R
SD car ds R
via device sc onnected by Bluetooth ®
i Information on single CD/DV Dd riv eorD VD
changer (see th eD igital Operator's Manual).
Selecting usin gt he device listMultimed ia system: X
Select Media { Devices .
The available medi as ources will be shown.
The ; dot indicates th ec urren ts etting.X
Select th em edi as ource.
Playable file sa re played.
Inserting/removing an SD card
Important safety notes
G WARNING
SD car ds are smal lp arts. They can be swal-
lowed and caus ec hoking. This pose sa n
increased ris kofi njury or eve nf atal injury.
Keep th eS Dc ar do ut of th er eac hofc hi ldren.
If aS Dc ar diss wallo wed, seek medical atten-
tio ni mmediately.
! If you are no longer usin gt he SD car d, you
should remove it and store it out side th ev eh i-
cle .H ig ht em peratures can damag et he card.
Insertin ganSDc ard
The SD car ds lot is locate dont he control panel.X
In ser tt he SD car di nt ot he SD car ds lot until
th eS Dc ar de ng ages .T he side wit ht he con-
tacts must fac ed own.
Removing an SD card X
Press th eS Dc ard.
The SD car dise je cted.X
Remo ve th eS Dc ar d.Operatin gs ystem 235
Multimedia system Z

Loading guidelines
G WARNING
If objects, luggage or loads are not secured or
not secured sufficiently, they could slip, tip
over or be flun ga roun da nd thereb yh it vehicle
occupants. Ther eisar isk of injury, particu-
larly in th ee ven tofs udden braking or as ud-
den change in direction.
Always store object ssot ha tt he yc annot be
flun ga round. Secure objects, luggage or
loads against slippin gort ipping before the
journey.
G WARNING
Combustio ne ngine se mit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter th ev ehicle interio rift he
trunk lid is open when th ee ngine is running,
especially if th ev ehicle is in motion .T her eisa
risk of poisoning.
Always switch off th ee ngine before opening
th et ru nk lid. Never driv ew ith th et ru nk lid
open.
G WARNING
The exhaust tail pipe and tail pipe trim can
become ver yh ot .Ify ou com ei nt oc ontact
with these part soft he vehicle ,y ou could burn
yourself. Ther eisar isk of injury.
Always be particularly careful aroun dt he
exhaust tail pipe and th et ail pipe trim. Allow
these component stoc oo ld own before touch-
ing them.
The handlin gc haracteristic sofal aden vehicle
are dependen tont he distribution of th el oad
within th ev ehicle.
Observe th ef ollowing notes when loadin ga nd
transporting al oad:R
Never exceed th em aximum permissible
gross vehicle mass or th eg ross axle weight
rating for th ev ehicle (includin go ccupants).
The values are specified on th ev ehicle iden- tification plat eont he B-pillar of th ed river's
door. R
The trunk is th ep referred place to carry
objects. R
Position heavy loads as far forwards as pos-
sible and as low down in th et ru nk as possible.R
The load must not protrude above th eu pper
edge of th es eat backrests. R
Always place th el oad against th er ear or front
seat backrests .M ak es ure that th es eat
backrests are securely locked int op lace.R
Always place th el oad behin du noccupied
seat sifp ossible. R
Use th ec argo tie-down rings and th ep arcel
net stot ra nsport loads and luggage. R
Use cargo tie-down rings and fastening mate-
rials appropriat ef or th ew eight and siz eoft he
load. R
Secure th el oad with sufficiently stron ga nd
wear-resistant tie-down s .P ad shar pe dges for
protection.
Stowage areas
Stowage spaces
Important safety notes
G WARNING
If object sint he passenge rc ompartmen ta re
stowed incorrectly, they can slide or be
thrown aroun da nd hit vehicle occupants. In
addition ,c upholders, open stowage spaces
and mobile phon eb racket sc annot always
retain all object st he yc ontain .T her eisar isk
of injury, particularly in th ee ven tofs udden
braking or as udden change in direction. R
Always stow object ssot ha tt he yc annot be
thrown aroun dins uch situations.R
Always mak es ure that object sdon ot pro-
trude fro ms to wage spaces, parcel net so r
stowage nets. R
Close th el ockable stowage spaces before
starting aj ou rney. R
Always stow and secure heavy, hard, poin-
ted ,s harp-edged, fragile or bulky object si n
th et ru nk.
Observe th el oadin gg uidelines ( Y
page 237).Stowage areas 237
Stowage and features Z

Securing loads Observe the following notes on securing loads: R
Observe the loading guidelines ( Y
page 237).R
Secure the load using the cargo tie-down
rings. R
Distribute the load on the cargo tie-down
rings evenly. R
Do not use elastic straps or nets to secure a
load, as these are only intended as an anti-slip
protection for light loads. R
Do not route tie-downs across sharp edges or
corners. R
Pad sharp edges for protection.
C
Cargo tie-down rings
Stowage well under the trunk floor
Under the trunk floor you can find ab racket for
TIREFIT and the vehicle tool kit, etc. X
To open: pull handle C up. X
Hook handle C into rain trough D .
To enlarge the trunk you can remove the trunk
floor. X
To remove: lift the trunk floor almost to rain
trough D and pull it out.
X
To insert: place the trunk floor at the bottom
in the center. X
Hold sides of trunk floor

! Mercedes-Benz recommends that you only
use roof carriers that have been tested and
approved for Mercedes-Benz vehicles. This
helps to prevent damage to the vehicle.
Position the load on the roof rack 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: R
open the panorama roof with power tilt/
sliding panel fully R
open the trunk lid fully
You will find information on the maximum roof
load in the "Technical data" section
( Y
page 320).
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.
Attaching the roof carrier
X
Open and fold the covers C upwards care-
fully in the direction of the arrow. X
Only secure the roof carrier to the anchorage
points under covers C .X
Observe the manufacturer's installation
instructions.
Features
Cup holder
Important safety notes
G WARNING
The cup holder cannot hold ac ontainer secure
whilst traveling. If you use ac up holder whilst traveling, the container may be flung around
and liquid may be spilled. The vehicle occu-
pants may come into contact with the liquid
and if it is hot, they may be scalded. You may
be distracted from the traffic conditions and
you could lose control of the vehicle. There is
ar isk of an accident and injury.
Only use the cup holder when the vehicle is
stationary. Only use the cup holder for con-
tainers of the right size. Alway sc lose the con-
tainer, particularl yift he liquid is hot.
G WARNING
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 ar isk
of injury, particularl yint he event of sudden
braking or as udden change in direction. R
Alway ss tow objects so that they cannot be
thrown around in such situations. R
Alway sm ake sure that objects do not pro-
trude from stowage spaces, parcel nets or
stowage nets. R
Close the lockable stowage spaces before
starting aj ourney. R
Alway ss tow and secure heavy, hard, poin-
ted, sharp-edged, fragile or bulky objects in
the trunk.
! Only use the cup holders for containers of
the right size and which have lids. The drinks
could otherwise spill.
Observe the loading guidelines ( Y
page 237).
The stowage compartment sint he doors provide
space for bottles: R
front :c apacity up to 34 fl. oz. (1.0 l)R
rear: capacity up to 17 fl. oz. (0.5 l)242
Features
Stowage and features

Have the system checked at the nearest
Mercedes-Benz Service Center or contact the
following service hotlines:
Mercedes-Benz Customer Assistance Center at
1-800-FOR-MERCede s( 1-800-367-6372) or
1-866-990-9007
Em er genc yc allImportant safety notes
G WARNING
It can be dangerou stor emai nint he vehicle,
eve nify ou have presse dt he SOS button in an
emergency if: R
yo us ee smoke insid eoro ut sid eoft he vehi-
cle ,e .g .ift her eisaf ir ea fte rana ccidentR
the vehicl eisonad an gerou ss ection of
road R
the vehicl eisn ot visible or canno te asil yb e
see nb yo the rr oa du se rs ,p ar ticularly when
dark or in poo rv isibility conditions
There is ar is kofana ccident and injury.
Leave the vehicl ei mmediatel yint his or simi-
la rs it uations as soo na sitiss af etodos o.
Mov etoas af el oc ation along with othe rv ehi-
cle occupants. In such situations, secure the
vehicl eina ccordance with nationa lr egula-
tions, e. g. with aw ar ning triangle.
General notes Observe the notes on system activation
( Y
page 245).
An emergency cal lisd ialed automaticall yifa n
ai rb ag or Emergency Tensioning Device is trig-
gered .Y ou canno te nd an automaticall yt rig-
gered emergency cal ly ours elf.
An emergency cal lc an also be initiated man-
ually.
As soo na st he emergency cal lh as been initi-
ated, the indicator lamp in the SOS button
flashes. The Connectin gC all message
appears in the multifunctio nd is play.
The audi oo ut pu ti sm ut ed.
Once the connectio nh as been made, the Call
Connected message appears in the multifunc-
tio nd is play. All important informatio nont he emergency is
transmitted, for example: R
current location of the vehicl e( as determined
by the GP Ss ys tem) R
vehicl ei de ntificatio nn umberR
informatio nont he severity of the accident
Shortly afte rt he emergency cal lh as been initi-
ated, av oice connectio ni sa ut omaticall ye stab-
lishe db et ween the Customer Assistance Center
and the vehicl eo ccupants. R
If the vehicl eo ccupants respond ,t he
Mercedes-Benz Customer Assistance Center
attempts to get more informatio nont he
emergency. R
If ther eisnor espons ef rom the vehicl eo ccu-
pants, an ambulance is immediatel ys ent to
the vehicle.
If no voice connectio nc an be established to the
Mercedes-Benz Customer Assistance Center,
the system ha sb ee nu nabl etoi nitiate an emer-
genc yc all.
Thi sc an occur, for example, if the relevant
mobil ep hone network is not available .T he indi-
cato rl am pint he SOS button flashe sc ontinu-
ously.
The Cal lF ailed message appears in the mul-
tifunctio nd is play and must be confirmed.
In this case, summon assistance by other
means.
Making an emergenc yc all
X
To initiate an emergenc yc al lm anually:
press cover C briefl ytoo pen.X
Press and hol dt he SOS button for at leas to ne
second D .
The indicator lamp in SOS button D flashes
unti lt he emergency cal lisc oncluded.X
Wait for av oice connectio ntot he Mercedes-
Benz Customer Assistance Center.246
Features
Sto wag ea nd featur es

South America
Floormats
G WARNING
Object sint he driver's footwell can restrict the
pedal travel or obstruct ad epressed pedal.
The operating and road safety of the vehicle is
jeopardized. There is ar isk of an accident.
Make sure that all object sint he vehicle are
stowed correctly, and that they cannot enter
the driver's footwell. Install the floormats
securely and as specified in order to ensure
sufficient clearance for the pedals. Do not use
loose floormats and do not place floormats on
top of one another.
X
Slide the seat back. X
To install: place the floormat in the footwell. X
Press safety catch knobs C onto retain-
ers D . X
To remove: pull the floormat off retainers D .X
Remove the floormat.256
Features
Stowage and features