change key battery MERCEDES-BENZ C-CLASS SALOON 2018 Owners Manual

Problem
Possible causes/consequences and 0050
0050Solutions 0007
Check the battery using the battery check lamp and replace if necessary (0013 page75). 0007
Use the emer gency keyto lock or unlock (0013 page75). 0007
Have theke ych ecked at a qualified specialist workshop.
Yo u ha velost a key. 0007
Have theke y deacti vated at a qualified specialist workshop. 0007
If necessar y,ha ve the mechanical lock changed as well. Doors
Note
s onthe additional door lock The additional door lock is only
available for
ve hicles forth eUni ted Kingdom. 000A
WARNING Risk of inju ryto persons
inside theve hicle when the additional
door lock is activated
If th e additional door lock is activated, the
doors can no longer be opened from the
inside. If
th ere are persons in theve hicle, they can
no longer le aveth eve hicle, e.g. in hazardous
situations. 0007
Never lea vepersons unattended in the
ve hicle, particularly children, elderly
persons or persons in need of help. 0007
Ifth ere are persons in theve hicle, do
not activate the additional door loc k. The additional door lock is automatically activa‐
te d in thefo llowing situations:
R The vehicle is loc ked using thekey.
R The vehicle is loc ked using KEYLESS-GO. If
th eve hicle has been loc ked via Mercedes me
connect, the additional door lock is not activa‐
te d.
If th e additional door lock is activated, the doors
cann otbe opened from the inside.
0009 After locking you can issue a signal with the
horn.
Yo u can pr eventthe additional door lock from
being activated bydeactivating interior pr otec‐
tion before locking theve hicle (0013 page 99). Opening and closing
77

Display messages
Possible causes/consequences and 0050
0050Solutions
00AF Replace key *T
hekey needs tobe replaced. 0007
Consult a qualified specialist workshop.
00AF Key not detected (white
display message) *T
hekey is cur rently und etected. 0007
Change the location of theke y in theve hicle. 0007
Ifth eke y is still not recognised, start the engine with theke y in the slot (0013 page169).
00AF Change key batteries *T
hekey bat tery is dischar ged. 0007
Replace the battery (0013 page75).
00AF
Place the key in the
marked space See Owner's
Manual *T
hekey de tection function is malfunctioning. 0007
Change the location of theke y in theve hicle. 0007
Start theve hicle with theke y in the slot (0013 page169). 534
Displaymessa ges and warning/indicator lamps

Ad
aptive Highbeam Assist Plus Cam‐
era view restricted See Owner's
Manual ................................................ 544
Ad aptive Highbeam Assist Plus cur‐
re ntly una vailable See Owner's Man‐
ual ...................................................... .544
Ad aptive Highbeam Assist Plus inop‐
erative ................................................ .544
0099 AdBlue sy stem fault Engine
st art not possible ................................ 523
0099 AdBlue sy stem fault Perf.
re duced in XXX km See Owner's
Manual ................................................ 523
0099 AdBlue sy stem fault Perf.
re duced: XXX mph No start in XXX
miles .................................................. .523
0099 AdBlue sy stem fault See Own‐
er's Manual ........................................ .522
00B2Ad d 1 litre engine oil when next
re fuelling ............................................. 521 Apply brake
todeselect Park (P)
position ...............................................5 25
Apply brake toselect R ........................ 527
00ADAT TENTION ASSIST inoperative ....511
00AD ATTENTION ASSIS T:Take a
break! .................................................. 507
0049Au tomatic driving lights inoper‐
ative .................................................... 542
Au xilia rybattery malfunction .............. 525
0044Before starting the engine, turn
th esteering wheel. .............................. 527
Blind Spot Assist cur rently una vaila‐
ble See Owner's Manual ...................... 505
Blind Spot Assist inope rative ............... 506
Blind Spot Assi stnot available when
to wing a trailer See Owner's Manual ...5 09
Brake immediate ly............................... 491
Cannot start engine See Owner's
Manual ................................................ .517
00AF Changekey bat teries .................. 534 004DCheck brake
fluid le vel................ 496
Check brake pads See Owner's Man‐
ual ...................................................... .504
00B2Che ckeng. oil le v.when next
re fuelling ............................................. 521
00CAChe cktrailer hitch lo ck(white
display message) .................................5 36
Che cktyre pressu resth en restart
Ru n Flat Indicator ................................ 532
0077Check tyre(s) ............................... 530
003AClean the fuel filter ...................... 51 5
Clutch overheated Avoid pulling away
fo r XX:XX mins .................................... 526
00ACCoolant Stop vehicle Switch
engine off ............................................. 517
Cruise cont rol and Limiter inope ra‐
tive ....................................................... 512
Cruise cont rol inope rative .................... 512
Cruise cont rol off ................................ .512 57 0
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