boot MERCEDES-BENZ A-CLASS SALOON 2021 Service Manual

*
N
NO
OTE
TE Inva lidation of the operating permit
due tofailure tocomply with the inst ruc-
tions for installation and use The operating permit may be in
validated if the
inst ructions for installation and use of two-w ay
ra dios are not obser ved. #
Only use appr oved frequency bands. #
Obser vethe maximum permissible out-
put po wer in these frequency bands. #
Only use appr oved aerial positions. 1
Front roof area
2 Rear roof area
3 Rear wings
4 Boot lid
On vehicles with a panoramic sliding sunroof, /t-
ting an aerial tothe front or rear roof area is not
permitted. On
there ar wings, it is recommended that you /t
th e aerial on the side of theve hicle closest tothe
cent reofthero ad.
Use Tech nical Speci/cation ISO/TS 21609 (Road
Ve hicles – "EMCs for installation of aTermar ket
ra dio frequency transmitting equipment") when
re tro/tting two- wayra dios. Comply with the legal
re qu irements for de tach able parts.
If yo ur vehicle has /ttings for two-w ayradio equip-
ment, use the po wer supply and aerial connectors
pr ov ided in the pre-ins tallation. Obser vethe man-
ufacturer's supplements when /tting.
T
T w
w o-wa
o-wa y r
y radio tr
adio tr ansmission output
ansmission output
The maximum transmission output (PEAK) at the
base of the aerial must not exceed theva lues in
th efo llowing table. 382
382
Te
ch nical data

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
C *A
t least one door is open. #
Close all doors.
M *T
he bonn etis open. &
W
WARNING
ARNING Risk of accident due todriving with the bonnet unloc ked
The bonnet may open and blo ckyour vie w. #
Neverre lease the bonnet when driving. #
Before every trip, ensure that the engine bonnet is loc ked. #
Stop theve hicle immediately in accordance with the tra1c conditions. #
Close the bonnet.
N *T
he boot lid is open. &
D
DAN
AN GER
GER Risk of exhaust gas poisoning
Combustion engines emit poisonous exhaust gases such as carbon monoxide. Exhaust gases can enter theve hicle
interior if the boot lid is open when theve hicle is running, especially if theve hicle is in motion. #
Always switch o. theve hicle before opening the boot lid. #
Never drive with the boot lid open. Display messages and
warning/indicator lamps
425
425

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions #
Close the boot lid.
Anti-theft alarm system
Malfunction *T
he anti-theT alarm system is malfunctioning. #
Consult a quali/ed specialist workshop.
¥
Top up washer fluid *T
hewasher 0uid le vel in thewa sher 0uid reser voir has dropped below the minimum. #
Top up thewa sher 0uid (/ page 330).
Wiper malfunctioning *The windscreen wiper is malfunctioning. #
Restart theve hicle.
If th e display message still appears: #
Consult a quali/ed specialist workshop. 426 426
Displ
aymessages and warning/indicator lamps

see Map
see
Route
N N eutr
eutr al
al
Engaging................................................ 178
N
Noise oise
Wheels and tyres................................... 363
Wheels/tyres......................................... 363 O
O
Occupant safe
Occupant safe ty
ty
see Airbag
see Automatic co-driver airbag shuto.
see Automatic measures aTer an accident
see Child seat
see Pets in theve hicle
see Post-collision brake
see PRE-SAFE ®
(anticipa tory occu-
pant pr otection)
see PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus)
see Restraint system
see Seat belt
Oil
Oil
see Engine oil On-boar On-boar
d com
d comput
puter
er
Displa yingthe service due dat e.............. 324
Head-up display menu............................ 277
Instrument displa y................................. 276
Menu overview.......................................2 73
Operating.............................................. 273
On-boar
On-boar d diagnos
d diagnostics int tics interf
erface
ace
see Diagnostics connection
On-boar
On-boar d electr
d electrical syst
ical syst em batt
em batter
ery (12 V)
y (12 V)
Charging................................................ 352
Re placing.............................................. .353
St arting assis tance............................... .352
On-boar On-boar d electr
d electronics
onics
Engine electronics................................. 381
No tes..................................................... 381
Tw o-w ayradios...................................... 381
on-demand f on-demand f eature
eature
Ac tivating................................................. 26
No tes...................................................... .26
Online ser
Online ser vices
vices
Data storag e............................................ 44
Online ser
Online ser vices
vices
see In-Car O1ce
Open-sour
Open-sour ce
cesoTw
soTw are
are................................... .45Opening t
Opening t
he boo
he boot lid using y
t lid using y our f
our foot
oot
HANDS-FREE ACCESS............................. 92
Oper
Oper ating
ating 0uids
0uids
Ad Blue ®
................................................ .390
Ad ditives (fuel)....................................... 388
Brake 0uid............................................. 393
Coolant (engine).................................... 393
Engine oil............................................... 391
Fu el (diesel)........................................... 388
Fu el (petrol)........................................... 387
No tes..................................................... 385
windsc reen washer 0uid........................ .394
Oper
Oper ating safe ating safe ty
ty
Declaration of conformity (electro-
magnetic compatibility)............................ 29
Declaration of conformity (jack)...............36
Declaration of conformity (TIREFIT kit)...... 37
Declaration of conformity (wireless
ve hicle components)................................ 29
Informatio n..................................... ......... 27
Oper
Oper ating syst ating syst em
em
see On-boa rdcomputer
Output
Output see Powe r me ter 506
506
Index

Seat cov
Seat cov
er (Car
er (Care)
e)......................................... 337
Seat heating
Seat heating Activating/deactivating.......................... 113
Seat v
Seat v entilation
entilation
Switching on/o..................................... 113
Selecting a g
Selecting a g ear
ear
see Changing gears
Select
Select or lev
or lever
er
see DIRECT SELECT le ver
Self-t
Self-t est
est
Au tomatic front passenger airbag shut
o............................................................. 57
Sensor
Sensor s (car
s (care)
e)............................................. 336
Ser
Ser vice
vice
see ASSY STPLUS
Ser
Ser vice cent re
vice centre
see Quali/ed specialist workshop
Ser
Ser vice int
vice int erv
erval display
al display
see AS SYST PLUS
Se
Se tting a speed
tting a speed ............................................ 172
Se
Se tting a speed
tting a speed
see Cruise control Se
Se
tting t
tting t he map scale
he map scale
see Map
ShiT
ShiT paddles
paddles
see Steering wheel gearshiT paddles
ShiTing
ShiTing g
gears
ears
GearshiT recommendation............ .177, 180
Side airbag
Side airbag..................................................... 52
Side im Side im pact prot
pact pr otection
ection ................................. 256
Side windo ws
Side windo ws
Au tomatic function.................................. .95
Child saf ety lock in there ar..................... .80
Closing using theke y............................... 96
Co nve nience closing............................... .96
Con venience opening.............................. .95
Opening with theke y................................ 95
Opening/closing...................................... 94
Problem................................................... 96
Ra in closing function................................ 95
Sliding sunr
Sliding sunr oof oof
Au tomatic functions................................. 99
Closing................................................... .97
Closing using theke y............................... 96
Opening................................................... 97
Opening wi th theke y................................ 95 Problem................................................. 100
Ra in-closing feature................................ .99
Smar
Smar tphone tphone
see Sma rtphone integ ration
see Telephone
Smar
Smar tphone int
tphone int egr
egration
ation
Overview................................................ 313
Sno
Sno w c
w chains
hains................................................3 63
Soc ke
Soc ket (12 V)
t (12 V)
Boot/luggage compartment................... 125
Fr ont centre console.............................. 125
Soc ke
Soc ket (115 V)
t (115 V)
Re ar....................................................... 125
SoTw
SoTw are
areupdate
update
System updates.................................... .288
Sound
Sound PRE-SAFE ®
Sound................................... 59
Sound menu
Sound menu Functions overview................................ 323
Spar Spar e wheel e wheel
see Emer gency spa rewheel
Specialis
Specialis t w
t w ork
ork shop
shop
see Quali/ed specialist workshop Index
511
511