Problem
Possible causes/consequences and 0050
0050Solutions 0007
Check the battery using the battery check lamp and replace if necessary (0013 page73). 0007
Use the emer gency keyto lock or unlock (0013 page73). 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 page97). Opening and closing
75
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 page170).
00AF
Change key batteries *T
hekey bat tery is dischar ged. 0007
Replace the battery (0013 page73).
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 page170). Displ
aymessa ges and warning/indicator lamps 535
Ad
aptive Highbeam Assist Plus cur‐
re ntly una vailable See Owner's Man‐
ual ...................................................... .545
Ad aptive Highbeam Assist Plus inop‐
erative ................................................ .545
0099 AdBlue sy stem fault Engine
st art not possible ................................ 524
0099 AdBlue sy stem fault Perf.
re duced in XXX km See Owner's
Manual ................................................ 524
0099 AdBlue sy stem fault Perf.
re duced: XXX mph No start in XXX
miles .................................................... 524
0099 AdBlue sy stem fault See Own‐
er's Manual ........................................ .523
00B2Ad d 1 litre engine oil when next
re fuelling ............................................. 522
Apply brake todeselect Park (P)
position ...............................................5 26
Apply brake toselect R ....................... 528 00ADAT
TENTION ASSIST inoperative ...512
00AD ATTENTION ASSIS T:Take a
break! .................................................. 508
0049Au tomatic driving lights inoper‐
ative .................................................... 543
Au xilia rybattery malfunction .............. 526
0044Before starting the engine, turn
th esteering wheel. .............................. 528
Blind Spot Assist cur rently una vaila‐
ble See Owner's Manual ...................... 506
Blind Spot Assist inope rative ............... 507
Blind Spot Assi stnot available when
to wing a trailer See Owner's Manual ...5 10
Brake immediately ............................... 492
Cannot start engine See Owner's
Manual ................................................ .518
00AF Changekey bat teries .................. 535
004DCheck brake fluid le vel................ 497
Check brake pads See Owner's Man‐
ual ...................................................... .505 00B2Che
ckeng. oil le v.when next
re fuelling ............................................. 522
00CAChe cktrailer hitch lo ck(white
display message) .................................5 37
Check tyre pressures then restart
Ru n Flat Indicator ................................ 533
0077Check tyre(s) ............................... 531
003AClean the fuel filter ...................... 516
Clutch overheated Avoid pulling away
fo r XX:XX mins ................................... .527
00AC Coolant Stop vehicle Switch
engine off ............................................. 51 8
Cruise cont rol and Limiter inope ra‐
tive ....................................................... 513
Cruise cont rol inope rative .................... 513
Cruise cont rol off ................................ .513
0025 currently una vailable See Own‐
er's Manual ........................................ .498
00E5cur rently una vailable See Own‐
er's Manual ........................................ .492 Index
571
