2018 MERCEDES-BENZ A-CLASS HATCHBACK service indicator

Overview of climate control sy
stems Note
s on climate control An interior air
filter must alw ays be used so that
th e air conditioning sy stem, pollution le vel moni‐
to ring and the air filtering function workcor‐
re ctly. Ma kesure that thefilter is ins talled cor‐
re ctly and thefilter housing in the engine com‐
partment is closed cor rectly using the cap and
alw ays tightly sealed when in operation. Use fil‐
te rs recommended and appr ovedby Mercedes-
Benz. Alw ays ha veservice workcar ried out at a
qu alified specialist workshop. THERMATIC control panel
overview The indicator lamps in
the buttons Ã,¬,
¤, g,¿and& indicate that the
cor responding function is activated. 1
w Setsthete mp erature
2 Vehicles with a stationary heater on ly:t
calls upthe air conditioning menu
3 H Setsthe air flow or switches off climate
control
4 Ã Sets climate control toautomatic
mode (→ page143)
5 ¬ Defrosts the windscreen
6 ¤ Switches there ar wind owheater on or
off
7 g Switches air-recirculation mode on or
off (→ page144)
8 ¿ Switches the A/C function on or off
(→ page 142) 9
Vehicles with a stationary heater on ly:&
swit ches thest ationary heater on or off
(→ page 145)
A _ Setsthe air distribution THERMOTRONIC control panel
overview The indicator lamps in
the buttons Ã,¬,
¤, g,Á,0and& indicate that
th e cor responding function is activated. Climate
control 141

#
Select the count ryon list 3.
The destination can be entered. #
Toaccept a destination: selectthe destina‐
tion in list 3. #
Ifth e destination is ambiguous, select the
destination in the list.
The destination address is shown. The route
can be calculated.
Using online sear ch
% Requirements: there is an Internet connec‐
tion.
Online sear chis not available in all countries.
De stination ent ryuses online map services. If
th e on-board sear chfinds no suitable de stina‐
tions or if youch ange countries, the online
sear chisavailable.
Fo rth e destination you can en ter an addre ss, a
POI or a thre e-word address.
% Ente r a 3 wordaddress (→ page 332). #
Select country indicator 1.#
Select the pr ovider forth e online service
from the count ries list. or #
Ifth e on-board sear chdelivers no sear ch
re sults, select Online search. #
Enter the destination in the input line. The
entry order is not releva nt, e.g. stre et and
to wn. Use the functions described forth e on-
board sear ch.
The sear chresults are displa yed. #
Select the destination in the list.
The de tailed view forth ero ute is displ ayed.
Selecting pr evious destinations
Re quirements:
R Prev ious destinations are stored.
R For destination sug gestions: you ha vecre‐
ated a profile (→ page 290).
R The Allow destination suggestions option is
switched on (→ page 295).
R The multimedia sy stem has already gathered
suf ficient da tain order toshow destination
suggestions. Multimedia sy
stem:
, © .
Navigation .
ª Where
to? .
PREV. DESTINATIONS
The following ent ries can be selected in the pre‐
vious destinations:
R Destination suggestions (→ page 348)
R Destinations
R Routes #
Select the destination or route.
The destination address is shown. The route
can be calculated.
% You can sa vea pr evious destination or a des‐
tination suggestion as a favo urite
(→ page 348).
Using thefa vo urites, you ha vequick access
to the destinations (→ page 333).
Selecting a POI
Re quirements:
R For use of personal POIs: a USB device is
connected wi th the multimedia sy stem. MBUX multimedia sy
stem 329

Entering
the destination as a 3 wordaddress
Re quirements:
R Sear ching for a destination using 3 word
addresses is possible in the online sear ch
( → page 326).
R The media display sho wsan In tern et connec‐
tion wi tha double-ar row symbol in thest atus
line.
% Sear ching for a destination using 3 word
addresses is not possible in all countries.
Multimedia sy stem:
, © .
Navigation .
ª Where to? #
Select the count ryindicator. #
Select the pr ovider forth e online service
from the count ries list.
or #
Ifth e on-board sear chdelivers no sear ch
re sults, select Online search. #
Enter the destination address as a 3 word
address. Separate each of thewo rds with a
full stop.
The sear chresults are displa yed. #
Select the destination in the list.
The destination address is shown. The route
can be calculated.
% 3wo rdaddresses from what3words are an
alternative addressing sy stem for multilin‐
gual georeferencing of global locations with
a re solution of thre e metres. Using this grid,
locations on the Ear th's sur face are included
whi chdo not ha vea building address such
as stre et and house number, forex ample.
The Brandenburg Gate in Berlin has thefo l‐
lowing language dependent 3 wordaddress,
fo rex ample:
R German: tapfer.ge bäude.verliehen
R Engl ish:that.lands.winning
R French: posteaux.bobineur.ombrant
3 wo rdaddresses are unique, easy to
re member and suf fice for most routine appli‐
cations.
The bidirectional co nversion of 3 word
addresses can be car ried out here:
R atthewe bsite http://what3words.com
R inthe what3words apps Selecting a destination on
the map
Multimedia sy stem:
, © .
Navigation #
Movethe map (→ page 357). #
Using theto uchscreen: press and hold on
th eto uchsc reen.
The destination address is shown.
If se veral destinations are located at the
selected position, a list sho wstheav ailable
ro ads and POIs. #
Select the destination in the list.
The destination address is shown. The route
can be calculated. #
Using theto uchpad: whenthe crosshair
mar ksthe destination, press and hold on the
control element.
The destination address is shown.
If se veral destinations are located around the
crosshair, a li stsho wstheav ailable roads
and POIs. #
Select the destination in the list.
The destination address is shown. The route
can be calculated. 332
MBUX multimedia sy stem

&
WARNING Risk ofexplosion from a fro‐
zen battery
A dischar ged battery may freeze at temp era‐
tures slightly abo veor below freezing point.
During starting assis tance or battery charg‐
ing, bat tery gas may be released. #
Alw aysth aw a frozen bat tery out first
before charging it or per form ing start‐
ing assis tance. If
th e indicator/warning lamps in the instrument
clus ter do not light up at low temp eratures, it is
ve ry likely that the dischar ged battery has fro‐
zen. In this case you may neither jump-s tart the
ve hicle nor charge the batter y.
The service life of a battery that has been
th awe d may be dramatically shor tened. The
st arting characteristics may be impaired, espe‐
cially at low temp eratures.
It is recommended that you ha veathaw ed bat‐
te ry checked at a qualified specialist workshop. *
NO
TEDama gecaused bynumerous or
ex tended attem ptsto start the engine Nume
rous or extended attem ptsto start the
engine may damage the catalytic con verter
due tonon-combu sted fuel. #
Avoid numerous and extended attem pts
to start the engine. Obser
vethefo llowing points during starting
assis tance and when charging the battery:
R Only use undamaged jump lead/charging
cables with a suf ficient cross-section and
insula tedte rm inal clamps.
R Non- insulated parts of thete rm inal clamps
must not come into con tact wi thother me tal
parts while the jump lead/charging cable is
connected tothe battery/jump-s tart connec‐
tion point.
R The jump lead/charging cable must not
come into contact wi thany parts which may
mo vewhen the engine is running.
R Alw ays make sure that nei ther you nor the
battery is elect rostatically charge d. R
Keep away from fire and naked flames.
R Do not lean overth e batter y.
Obser vethe additional following points when
ch arging the battery:
R Only use battery charge rs tested and
appr oved for Mercedes-Benz.
R Read the battery charge r's operating instruc‐
tions before charging the batter y.
Obser vethe additional following points during
st arting assis tance:
R Starting assis tance may only be pr ovided
using batteries with a nominal voltage of 12
V.
R The vehicles must not touch.
R Petrol engine: only acceptstarting assis‐
ta nce if the engine and exhaust sy stem are
cold. Breakdown assis
tance 447

Ty
re pressure loss warning sy stem Fu
nction of the ty repressure loss warning
sy stem
The tyre pressure loss warning sy stem warnsthe
driver bymeans of display messa ges when there
is a se vere tyre pressu reloss.
Af ter a change in tyre pressure, a wheel rotation
or a tyre change, or if you ha verefitted wheels
or tyres, the tyre pressure loss warning sy stem
has tobe restar ted (→ page 467).
The tyre pressure loss warning sy stem does not
re place the need toregular lych eck the tyre
pressures.
Sy stem limitations
The sy stem may be impaired or may not function
in thefo llowing situations:
R ifth e tyre pressure is set incor rectly
R ifth ere is a sudden pressure loss caused, for
ex ample, byafo re ign object penetrating the
tyre
R ifth e pressure loss in se veral tyres decrea‐
ses at the same rate The sy
stem has a limited or dela yed function:
R when thero ad sur face is poo r,e.g. snow or
gra vel
R when driving with sn ow chains
R when driving in a very sporty driving style
with high cornering speeds or sudden accel‐
eration
R when driving with a high load
Be sure toalso obse rveth efo llowing fur ther
re lated subjects:
R Notes on tyre pressure (→ page 459)
R Display messages about the tyres
(→ page 528)
Re starting the ty repressure loss warning
sy stem
Requ irements:
R The recommended tyre pressure is cor rectly
set forth ere spective operating status on
each of thefo ur wheels (→ page 459). Re
start the tyre pressure loss warning sy stem in
th efo llowing situations:
R The tyre pressure has changed.
R The wheels or tyres ha vebeen changed or
newly fitted.
On-boa rdcompu ter:
, Service .
Tyres #
Swipe down wards on Touch Control on the
left-hand side of thesteering wheel.
The Run Flat Indicator activeRestart message
is shown in the multifunction displa y.
Re start the tyre pressure loss warning sy stem in
th efo llowing situations:
R The tyre pressure has changed.
R The wheels or tyres ha vebeen changed or
newly fitted. #
Tobegin restart, press Touch Control on the
left-hand side of thesteering wheel.
The Tyre pressure now OK? message is
shown in the multifunction displa y. #
Select Yes. Wheels and tyres
467

#
Toconfirm restart, press Touch Control on
th e left-hand side of thesteering wheel.
The Run Flat Indicator restarted message is
shown in the multifunction displa y.
Af teryo u ha vedriven for a few minutes, the
tyre pressu reloss warning sy stem monitors
th e set tyre pressures of all the tyres.
Be sure toalso obse rveth efo llowing fur ther
re lated subjects:
R Notes on tyre pressure (→ page 459)Wheel
change Note
s on selecting, fitting and replacing
tyres Yo
u can ask for information rega rding permit ted
wheel/tyre combinations at a Mercedes-Benz
Service Cent re. &
WARNING Risk of accident due toincor‐
re ct dimensions of wheels and tyres
If wheels and tyres of the wrong size are
used, the wheel brakes or wheel suspension
components may become damaged. #
Alw aysre place wheels and tyres with
th ose that fulfil the specifications of the
original part.
When replacing wheels, make sure tofit the
cor rect:
R Designation
R Type
When replacing tyres, make sure tofit the
cor rect:
R Designation
R Manufactu rer
R Type &
WARNING Risk of inju rythro ugh exceed‐
ing the specified tyre load-bearing capa‐
city or the permissible speed rating
Exceeding the specified tyre load-bearing
capacity or the permissible speed rating may
lead totyre dama geand tothe tyres bur st‐
ing. #
Therefore, only use tyre types and sizes
appr ovedfo ryo ur vehicle model. #
Obser vethe tyre load-bearing capacity
ra ting and speed rating requ iredfor
yo ur vehicle. *
NO
TEVehicle and tyre damage thro ugh
tyre types and sizes that ha venot been
appr oved Fo
r saf etyre asons, on lyuse tyres, wheels
and accessories which ha vebeen specially
appr ovedby Mercedes-Benz foryo ur vehicle. 468
Wheels and tyres

Display messages
Int
roduction Note
s on display messages
Display messages appear on the multifunction
displa y.
Displ aymessa ges with graphic symbols are sim‐
plified in the Owner's Manual and may dif fer
from the symbols on the multifunction displa y.
The multifunction display sho wshigh-priority dis‐
play messages in red. Cer tain display messages
are accompanied byawa rning tone.
Please respond in accordance with the display
messages and follow the additional no tes in this
Owner's Manual.
Fo r some display messa ges, a symbol is also
shown:
R ¤ Further information R
O Hide display message
Yo u can select the desired symbol byswiping
left or right on the left-hand Touch Control.
Press the¤ symbol toshow fur ther informa‐
tion on the multifunction displa y.Press theO
symbol tohide the display message.
Yo u can hide lo w-priority display messages by
pressing the¤ button or the left-hand Touch
Control. The displ aymessa ges are then stored in
th e message memor y.
Re ctify the cause of a display message as
qu ickly as possible.
High-priority display messages cannot be hid‐
den. The multifunction display sho ws these dis‐
play messages continuously until the cause of
th e message has been rectified. Calling up
stored displ aymessages
On-boa rdcompu ter:
, Service .
1 message
If th ere are no display messages, No messages
appears on the multifunction displa y. #
Scroll thro ugh the display messages byswip‐
ing upwards or down wards on the left-hand
To uch Control. #
Toexitth e message memor y:press the
¤ button. 498
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and M
MSolutions
Active Brake Assist Func-
tions limited See Owner's
Manual *
Ve hicles with Driving Assistance Package: Active Brake Assi stwith cross-traf fic function, Evasi veSteering
Assist or PRE‑SAFE ®
PLUS is malfunctioning.
Ve hicles without Driving Assistance Package: Active Brake Assi stis malfunctioning. #
Consult a qualified specialist workshop.
Active Brake Assist Func-
tions currently limited See
Owner's Manual *
Ve hicles with the Driving Assistance Package: Active Brake Assi stwith cross-traf fic function, Evasi veSteering
Assist or PRE‑SAFE ®
PLUS are temp orarily una vailable or only partially available.
Ve hicles without the Driving Assistance pa ckage: Active Brake Assi stistemp orarily una vailable.
The ambient conditions are outside the sy stem limits . #
Drive on.
As soon as the ambient conditions are within the sy stem limits, the sy stem will become available again. #
Ifth e display message does not disappear, stop theve hicle while paying attention toroad and traf fic conditions
and restart the engine.
PRE-SAFE inoperative See
Owner's Manual *
PRE‑SAFE ®
functions are malfunctioning. #
Consult a qualified specialist workshop.
Mercedes me connect
Services limited See Own-
er's Manual *S
ervice limited.
At least one of the main functions of the Mercedes me connect sy stem is malfunctioning. #
Obser vethe no tes on the diagnostics connection (→ page 25). #
Consult a qualified specialist workshop. Display messages and
warning/indicator lamps 511