2021 MERCEDES-BENZ A-CLASS SALOON transmission

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions #
Depress the brake pedal. #
Engage park position j. #
Consult a quali/ed specialist workshop.
Transmission Malfunction *The transmission is malfunctioning. The cause could be an overheated clutch or bloc kedge ars. #
Let the transmission cool down. #
Ifth e display message still appears following a restart, consult a quali/ed specialist workshop.
d Trans. oil overheated Drive
on with care *T
he transmission is overheating. When the display message is active, start-up and driving characteristics may be tem-
porarily impaired. #
Drive at low engine speed. #
Avoid sporty driving. #
Before pulling away on uphill gradients, let the transmission cool down until the display message disappears.
Parking lock inoperative
Apply the parking brake *T
he transmission is malfunctioning. The park position jcann otbe selected. #
Park theve hicle safel y. #
Use the electric parking brake tosecure theve hicle against rollingaway.
Teaching in transmission
Operate selector lever
Brake for XX seconds Risk
of vehicle rolling *T
he transmission is being taught in. There is a risk of theve hicle rolling away. #
Depress and hold the brake pedal until thete ach-in process has been comple ted.
The electric parking brake is applied automatically during thete ach-in process. #
Switch on theve hicle. 432 432
Displ
aymessages and warning/indicator lamps

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions #
Select park position j, transmission position kor neutral i.
Risk of vehicle rolling away
Apply parking brake See
Owner's Manual *T
he transmission position cann otbe reliably identi/ed. #
Use the electric parking brake tosecure theve hicle against rollingaway.
Teaching in transmission
complete *T
he transmission's teach-in process is comple te. All transmission positions can be selected again.
Transmission Malfunction
Visit workshop *T
he transmission is malfunctioning.
Consult a quali/ed specialist workshop.
Depress clutch fully to
start engine *Y
ou ha veattem pted tostart theve hicle without depressing the clutch pedal. #
Depress the clutch pedal and then start theve hicle.
*T hevehicle has stalled while theve hicle was pulling away,e.g. because the clutch pedal wasre leased tooqu ickl y. #
Depress the clutch pedal again.
The vehicle will start automaticall y. #
Slowly re leasethe clutch pedal topull away.
Clutch overheated Avoid
pulling away until the warn-
ing goes out *T
he clut chis under considerable load and is overheating.
Av oid frequent pulling away and driving at walking pace over longer distances. #
Stop theve hicle, paying attention toroad and tra1c conditions and lea vetheve hicle running.
The clutch will cool more quickly when theve hicle is running. Display messa
ges and warning/indicator lamps
433 433

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
or #
If possible, continue driving at a steady speed and remo veyour foot from the clutch pedal. Do not let the clutch
drag.
The clutch will cool while theve hicle is in motion.
When the clutch has cooled down, the display message will disappear.
Auxiliary battery malfunc-
tion (white display message) *T
he auxiliary battery forth e automatic transmission is no longer being charge d. #
Consult a quali/ed specialist workshop. #
Until then, alw ays select park position jmanually before you switch o. theve hicle. #
Before leaving theve hicle, apply the electric parking brake.
Auxiliary battery malfunc-
tion (red display message) *V
Vehicles wit ehicles wit h manual tr
h manual tr ansmission:
ansmission: There is afault with the auxiliary batter y.
V
V ehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: The auxiliary battery forth e transmission is no longer being charge d. #
Consult a quali/ed specialist workshop. #
V
V ehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: untilthen, alw ays select park position jbefore you switch o. theve hicle. #
Before leaving theve hicle, apply the electric parking brake. 434
434
Display messages and
warning/indicator lamps

W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions #
Make sure that the air supply tothera diator is not obstructed. #
Avoiding high loads on the engine, drive tothe nearest quali/ed specialist workshop. In doing so, ensu rethat the
coolant temp erature display remains below 120°C.
ÿ
Coolant warning lamp (yel-
low) *T
he yellow coolant warning lamp is lit while the engine is running.
Po ssible causes:
R The temp erature sensor is malfunctioning
R The charge air, transmission oil or battery cooling is faulty
R The radiator shutters are bloc ked or defective #
Avoiding high loads on the engine, drive tothe nearest quali/ed specialist workshop.
; Engine diagnosis warning
lamp *T
he yellow engine diagnostics warning lamp is lit while the engine is running.
A malfunction has occur red in the engine, theex haust system or the fuel system.
The emissions limit value may ha vebeen exceeded and the engine may be running in eme rgency operation mode. #
Have theve hicle checked as soon as possible at a quali/ed specialist workshop.
V
V ehicles wit
ehicles wit h a diesel engine:
h a diesel engine: the fuel tank may ha vebeen run dr y. #
Start the engine thre eto four times aTer refuelling.
If th eye llow engine diagnosis warning lamp goes out, emer gency ope ration mode is cancelled. The vehicle need not
be checked. Display messages and
warning/indicator lamps
475
475

A
A
ut
ut omatic engine st
omatic engine st op
op
see ECO start/s top function
A
A ut
ut omatic fr
omatic fr ont passeng
ont passeng er airbag
er airbagshut
shuto.
o.
PA SSENGER AIR BAG indicator la mps...... 57
A
A ut
ut omatic measur
omatic measur es
esaTer
aTer an accident
an accident ............ 60
A
A ut
ut omatic mirr
omatic mirr or f
or folding function
olding function
Ac tivating/deactivating.......................... 146
A
A ut
ut omatic tr
omatic tr ansmission
ansmission
DIRECT SELECT le ver............................. 177
Drive prog rams...................................... 172
DY NAMIC SELECT switch....................... 172
Engaging drive position.......................... 179
Engaging reve rsege ar............................ 178
Kickdown............................................... 180
Manual gear changing........................... .179
Selecting park position........................... 178
St eering wheel gearshiT paddles............ 179
Tr ansmission position displ ay................. 177
Tr ansmission position s........................... 177
A
A ut ut omatic tr
omatic tr ansmission (pr
ansmission (problem) oblem)
see Transmission (problem)
Axle load
Axle load Perm issible............................................ 384
Tr ailer operatio n..................................... 399 B
B
Ball neck
Ball neck Folding out/in........................................ 265
B
B AS (Br
AS (Br ak
ake Assis
e Assist Syst t System)
em)........................... 216
Batt
Batt ery
ery
see High-voltage battery
Batt
Batt er
ery (high-v
y (high-v olt
oltag
age on-boar
e on-boar d electr
d electrical
ical
syst
syst em)
em)
see High-voltage battery
Batt
Batt er
ery (ke
y (ke y)
y)
Re placing................................................. 84
Batt
Batt er
ery (v
y (v ehicle)
ehicle)
Charging (Remo teOnline)..................... .161
No tes..................................................... 349
No tes (starting assis tance and charg-
ing)........................................................ 350
Batt
Batt er
ery oper
y oper ation
ation......................................... 156
Belt
Belt
see Seat belt
Bicy
Bicy cle r
cle r ack
ack
Load capacit y........................................ 399
Tr ailer operatio n.................................... .268 Blind Spo
Blind Spo t Assist
t Assist
Ac tivating/deactivating.......................... 246
Fu nction................................................ 243
System limi tations.................................. 243
Blow
Blow er
er
see Clima tecont rol
BlueTEC BlueTEC see AdBlue ®
Bonnet Bonnet Function (active bonnet)......................... 325
Opening/closing.................................... 326
Re setting (active bonn et)........................ 325
Boo
Boo t lid
t lid
Closin g.................................................... 91
HANDS-FREE ACCESS............................. 92
Opening...................................................90
Br
Br ak
ak e Assis
e Assist Syst t System
em
see BAS (Brake Assist System)
Br
Br ak
ak e
e0uid
0uid
No tes..................................................... 393
Br
Br ak
ak e f
e f or
orce disce distr tribution
ibution
EBD (Elect ronic Brake forc e Distribu-
tion)....................................................... 218 Index
487
487

PRE-SAFE inoperati
veSee Owner's
Manual.................................................. 406
Re duce speed........................................ 461
Re duced drive system per form ance
See Owner's Manual.............................. 417
Re versing not poss. Consult workshop ... 431
Risk of vehicle rolling away App ly
parking brake See Owner's Manual ........ 433
Risk of vehicle rolling awayPa rking
brake not applied See Owner's Manual ... 438
Risk of vehicle rolling Driver door
open and transmission not in P .............. 431
Ru n Flat Indica tor inoperative................. 462
Speed limit (winter tyres) XXX km/h .......443
Speed Limit Assist cur rently una vaila-
ble See Owner's Manual........................ 443
Speed Limit Assist inoperative................ 443
Te aching in transmission comple te......... 433 Te
aching in transmission Operate
selector le ver Brake for XX seconds
Risk of vehicle rolling ............................. 432
To shiT out of P or N,depress brake
and start engine.................................... .430
To switch o. the engine, press the
St art/ Stop button for at least 3 sec-
onds or 3 times...................................... 427
Tr a1c Sign Assist cur rently una vaila-
ble See Owner's Manual........................ 445
Tr a1c Sign Assist inoperative................. 445
Tr ansmission Malfunction ....................... 432
Tr ansmission Malfunction Stop............... 431
Tr ansmission Malfunction Visit work-
shop ...................................................... 433
Ty re press. monitor cur rently una vaila-
ble......................................................... 458
Ty re press. monitor inoperative .............. 458
Ty re press. monitor inoperative No
wheel sensors ........................................ 459 Ty
re pressure Check tyres ...................... 461
Ty re(s) ove rheated .................................. 461
Ve hicle not cur rently being charged
Charging station fault............................. 416
Wi per malfunctioning .............................426
Wi thout changing gear, consult work-
shop ............................................. .418, 431
Wi thout starting engine again, consult
wo rkshop ............................................... 418
Dist
Dist ance contr
ance contr ol ol
see Active Distance Assist DISTRONIC
DIS
DIS TR
TRONIC
ONIC
see Active Distance Assist DISTRONIC
Door
Door Additional door loc k................................. 86
Child saf ety lock (rear door )..................... 79
Locking/unlocking (emer gency key)........ .89
Opening (from inside).............................. .86
Unlo cking (from inside)............................ 86
Door contr
Door contr ol panel
ol panel......................................... 18
Dra
Dra wbar
wbar
see Tow- bar system 496
496
Index