Pr
Pr
oblems wit
oblems wit h t
h the key
he key , tr
, troubleshoo
oubleshoo ting
ting Y Y
ou can no long ou can no long er loc
er lock or unloc
k or unloc k t
k the v
he v ehicle
ehicle
Po ssible causes:
R The key battery is weak or dischar ged. #
Check the battery using the indicator lamp
(/ page 81). #
Replace theke y batter y,if necessary
(/ page 83). #
Use there placement key. #
Use the emer gency keyto lock or unlock
(/ page 88). #
Have theke ych ecked at a quali/ed specialist
wo rkshop.
Ther
Ther e is int
e is int erf
erfer
erence fr
ence fr om a pow
om a pow er
er ful r
ful r adio signal
adio signal
sour sour ce ce
Po ssible causes if the function of theke y is
impaired:
R high voltage po wer lines
R mobile phones
R electronic devices (no tebooks, tablets) R
shielding due tome tal objects or induction
loops for electrical gate systems or automatic
bar riers #
Make sure that there is su1cient distance
between theke y and the po tential sou rce of
inter fere nce.
Y
Y ou hav
ou hav e los
e lost a key
t a key #
Have theke y deactivated at a quali/ed spe-
cialist workshop. #
If necessar y,ha ve the mechanical lock
re placed as well. Doors
Doors
N
No
ot
tes on t
es on t he additional door lock
he additional door lock The additional door lock is only
available forve hi-
cles forth e United Kingdom. &
W
WARNING
ARNING Risk of injury topersons inside
th eve 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. #
Never lea vepersons, in particular chil-
dren, unattended in theve hicle. #
Ifth ere are persons in theve hicle, do not
activate the additional door loc k. The additional door lock is automatically activated
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 activated
(/ page 317).
If th e additional door lock is activated, the doors
cannot be opened from the inside.
% ATer locking you can issue a signal with the
horn. 84 84
Opening and closing
