2020 MERCEDES-BENZ A-CLASS SEDAN keyless

#
Toswitc hbe tw een settings: press the
Ü andß buttonssimul taneou slyfor
appr oximat elysix seco ndsuntilth eindicat or
lam pflashes twice.
Op tions ifth eunloc kingfunction forth edr iver's
door andfuel filler flap has been selected:
R Tounlo cktheve hicl ece ntr ally:press the
Ü buttontwice.
R Vehicl eswith KEYLESS-GO :if yo uto uc h
th einner surface ofthedoor handle onthe
dr iver's door ,onl yth edr iver's door andfuel
fi ller flap areunlo cked. Deactiv
atingtheSm artK ey functio ns If
yo udo notuse theve hicle oraSmar tKey for
an extende dpe riod oftime, youcan reduce the
ener gycon sum ption ofthere spectiv eSmar tKey .
To do so, deactiv ateth eSmar tKey functions. #
Todeac tivate: press theß buttononthe
Smar tKey twi ce inqu ick succ ession .
The Smar tKey indic ator lam pflashes twice
br ief lyand light sup once. #
Toactiv ate: press anybutt onontheSmar t‐
Ke y.
% When theve hicle isstar tedwit hth eSmar t‐
Ke yin themar kedspace ofthecent ercon ‐
sole, theSmar tKey functions areau tomati‐
cally activated (/ page13 2). Re
mo ving /ins ertin gthe eme rgency key #
Toremo ve:pr ess release knob 1.
Em erge ncy key2 ispush edout slightly. #
Pull outemer gency key2 untilit en gage sin
th eint ermediat eposition . %
Depen dingontheve hicle's equipment, the
int ermediat eposit ionisno tav ailable. #
Press release knob 1 again and fully
re mo veemer gency key2. #
Toinser t:press release knob 1. #
Insertemer gency key2 totheint ermediat e
position orfull yuntil iteng ages.
% Youcan usetheint ermediat eposition of
emer gency key2 toatt achth eSmar tKey to
a ke yring. Re
plac ingthe Smar tKey batt ery &
DANG ER Serious damag eto healt h
caused byswallo wing batteries
Batt eries cont aintoxic and corrosiv esub‐
st anc es.Swallo wing batteries ma ycause
ser ious damag eto healt h.
Ther eis arisk offata linj ury. #
Keep batt eries out ofthere ac hof chil‐
dr en. Open
ingand closing 67

Pr
oblems withKEYLESS-GO Pr
oblem
Possible causes/conseq uencesand0050 0050
Solutions
Yo ucan nolongerloc kor unloc kth e
ve hicle using KEYLES S-GO. Po
ssible causes:
R The Smar tKey functions have been deactiv ated (/ page67 ).
R The Smar tKey batt eryis we ak ordisc harged.
R Ther eis int erfere nce from apo we rful radio signal source.
R The Smar tKey isfaulty . #
Activateth eSmar tKey functions (/page67 ). #
Chec kth ebatt eryusing theindicat orlam pand replace ifnec essar y(/ page67 ). #
Use theemer gency keyto unlo ckorloc kth eve hicle (/page67 ). #
Have theve hicle andSmar tKey checkedat aqu alif ied spec ialistwo rkshop. Ac
tiv atin g/deac tivatin gthe automati clo ck ‐
ing featur e The
vehicle isloc kedaut omatic allywhen the
ignit ionisswitc hedonand thewheels aretur n‐
ing faster than walkin gpace. 72
Opening andclosing

Con
venience closing (closing theve hicl e
fr om outside ) &
WARNIN GRisk ofentr apment caused by
inadv ertent con venie nce closing
Whe nth econ venie nce closing featur eis
oper ating,par tsof thebody could become
tr apped intheclosing area oftheside win‐
do wand thesliding sunroof. #
Obser vethecom pleteclos ingproce‐
du re when usingconvenie nce closing. #
Whe nclo sing, makesur eth at no body
par tsarein theclosing area. #
Press and hold theß buttononthe
Smar tKey .
The follo wing functionsar eper form ed:
R The vehicle isloc ked. R
The side windo wsareclo sed.
R The pano ramic sliding sunr oofisclosed . #
Tointerru pt con venience closing: release
th eß button. #
Toclose thero ller sunblind s:press and
hold theß buttonagain.
% Con venie nce closing can also be operated
wi th KEYLESS- GO(/ page70). Pr
oble mswith theside windo ws &
WARNIN GRisk ofbeco ming trap ped or
fa ta lly injured ifre ve rsing protect ion is
no tactiv ated
If yo uclo seaside windowagain imm ediat ely
af te rit has been blocked, theside windo w will
close withincr eased ormaximum forc e.
The reve rsing featur ewill then notbe activ e.
Pa rts of thebody could become trapped in
th eclosing area inthepr ocess. #
Mak esur eth at no par tsof thebody are
in theclosing area. #
Tostop theclosing process, release the
butt onorpress thebutt onagain tore-
open theside windo w. Pr
oblem
Possible causes/conseq uencesand0050 0050
Solutions
A side windo wcann otbe closed and
yo ucan notsee thecause. #
Chec kto see whether anyobjec tsarein thewindo wguide. #
Adjus tth eside windo ws. 80
Openin gand closing

Indicat
orlam p1 flashes whentheAT Asy stem
is armed.
The ATAsy stem isdeactiv ated aut omaticall yin
th efo llo wing situat ions:
R Afterunloc kingtheve hicle withth eSmar t‐
Ke y
R Afterunloc kingtheve hicle using KEYLES S-
GO R
Afterpr essing thest ar t/ stop butt onwithth e
Smar tKey inthestow agecom partment
(/ page13 2)
% WhentheMer cedes‑ Benzemergency call
sy stem isactiv eand thealar mstay son for
mor eth an 30 sec onds, ames sageis aut o‐
mat icall ysen tto theCus tomer Assis tance
Ce nter (/ page 357).
% Inthecase ofsevere batt erydisc harging,
th eanti- theftalar msystem isaut omaticall y
deactiv ated tofacil itat eth ene xt engine
st ar t.
Deact ivat ing theATA #
Press theÜ, ßor008B buttononthe
Smar tKey .
or #
Press thest ar t/ stop butt onwithth eSmar t‐
Ke yin themar kedspace (/page13 2)
Dea ctivat ingth eala rm using KEYLESS-GO #
Grasp theoutside doorhandle withth e
Smar tKey outside theve hicle. Fu
nction oftheto w- aw ay alar m %
This function mayno tbe available inall
coun tries.
An audible andvisual alarmistrigg ered ifan
alt eratio nto your vehicle's angleof inclination is
de tected whi letheto w- aw ay alar misarmed.
The tow- aw ay alar misaut omat icallyar med afte r
appr oximat ely60 seco nds:
R Afterloc king theve hicle withth eSmar tKey
R Afterloc king theve hicle using KEYLES S-GO
The tow- aw ay alar mison lyarmed when thefo l‐
lo wing compone ntsar eclos ed:
R The door s
R The trunk lid
The tow- aw ay alar misaut omat icallydeac tiva‐
te d:
R Afterpr essing theÜ or008B buttonon
th eSmar tKey
R Afterpr essing thest ar t/ stop butt onwithth e
Smar tKey inthemar kedspace (/page13 2) Op
ening an dclos ing 87

K
KEYLESS- GO
Loc kingth eve hicle ................................ 70
Pr oblem .................................................7 2
Un loc kin gse tting ............................ ...... 66
Un loc kin gth eve hicle ............................7 0
Kic kdow n.................................................1 45
Using .............. .....................................145
Knee airbag ...... .......................................... 40 L
Label ing(tires)
see Tire labeling
Lam p
see Interior light ing
Lam ps(Ins trum ent Displa y)
see Warning/ indic ator lam ps
Lane detection (automatic )
se eAc tiveLa ne Keeping Assist
Lane Keeping Assist
see ActiveLa ne Keeping Assist Languag
e.................................................2 86
No tes .................................................. 286
Se ttin g............................................. ....2 86
LA TC H-type (ISOFI X)child seat secur‐
ing system
In stallin g................................................ 55
Light switch
Ov ervie w .......................................... ....1 13
Light ing
see Inte rior lighting
see Lights
Lights ........................................................ 113
Ad aptiveHig hbeam Assis t.............. .....1 16
Ad jus ting theins trument lighting ........ 220
Au tomatic driving lights..... .................. 114
Comb inationswit ch<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011> 114
Cor nering light func tion<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011> 116
Haza rdwa rning light s.................... ...... 115
High beam............ ...............................114
High -beamflasher ................................ 114
Light switch..... .............................. ......1 13
Lo w-beam headlam ps.................... ...... 113
Pa rking light s.................................. .....1 13
Re ar foglam p................................. ...... 113 Re
sponsibili tyforlig hting systems .......1 13
Se tting theex terior lighting switch-
of fdela ytime ....................................... 117
St andi nglight s.....................................1 13
Swi tching thesur round lighting
on /of f.................................................. 118
Tu rn signals .......................................... 114
Limit edWa rranty
Ve hicle .................................................. 29
Liv eTr af fic Inf orma tion
Dis playing thetra ffic map .................... 316
Dis play ing traffic inci dents <0011001100110011001100110011001100110011001100110011001100110011
00110011> 317
Pr ov ider informatio n............................ 316
Sho wing local area message s.............. 318
Swi tching thetra ffic inf ormatio ndis‐
pla yon .................................................3 17
Load index(tir es) .................................... 438
Load -bearing capacit y(tir es) ................. 438
Loading ..................................................... 104
Car gotie-do wn rings <0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011> ...104
Def initio ns ............ ...............................440
No tes ..................................................... 99
Ro ofcar rier ......................................... 105
St ow agespac eunde rth etrunk floor ...105 Inde
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Load
ingguid elines .................................... 99
Load inginforma tion table ...................... 431
Load s
Sec uring ................ ................................ 99
Loc king/u nlocking
Ac tivati ng/d eactiv ating theaut o‐
matic locking featur e.............................7 2
Emerg encykey ...................................... 73
KEYLESS- GO................................... .......70
Un loc kin gand open ingdoor sfrom
th einside ............ ..................................7 0
Lo w-beam headla mps
Swi tching on/of f<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011> 113
Lu bricant additives
see Additiv es
Lu ggage
Sec uring ................................................ 99
Lu mbar support
se eLu mbar support(4-w ay)
Lu mbar support(4 -w ay)...........................9 2 M
Maint enanc e
Menu (on-boa rdcom puter) ..... .......... ... 220
Ve hicle ............................................. ...... 24
Maint enanc e
see ASSYSTPL US
Malfunct ion
Pa rking AssistPA RK TRONI C................ 189
Re stra int system .............................. ..... 35
Malfu nction messag e
see Displa ymessag e
Map ................................................... 316, 319
Av oiding anarea ..................................3 23
Av oiding anarea (ove rview) .................3 23
Cha nging anarea ....... ..................... .... 323
Dele tinganarea ....... ........................... 324
Displ aying thecom pass .................. ..... 325
Displa yingthemap version ............ .....3 22
Displ aying thene xt int ersect ing
st re et <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
001100110011> 322
Disp laying thera ng e <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011> ..326
Disp laying thesat ellit emap ................3 25
Displ aying thetra ffic map .................... 316
Dis play ing weather informat ion ...... .....3 26 Map
data....... ......................................324
Mo ving ................................................ 320
Selecti ngPOI symb ols....... ..................321
Selecti ngtext informati on<0011001100110011001100110011001100110011001100110011001100110011
001100110011> 322
Sel ecti ngthemap orient ation .............3 20
Se tting themap scale .......................... 319
Se tting themap scale automatic ally....3 25
Sho wing inthemultifunc tiondispla y
of theins trument cluster ..... ................3 26
Switc hingfree wa yin fo rm atio n
on /of f.................................................3 22
Up dating .............................................. 324
Massa geprog ram
Re settin gth ese ttings ............................9 4
Massag epr og rams
Sel ecti ngthefront seats ....................... 94
Massag ese ttings
Re settin g............................................... 94
Matt efinish (cleaning instructions) ...... 394
Maxim umload ratin g<0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011> ......437
Maxi mum permis sibl elo ad
Ca lcu latio nex am ple ............................ 433
De term inin g........................................ 432 54
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