Page 87 of 541

Ther
Ther
e is int
e is int erf
erfer
erence fr
ence fr om a pow
om a pow er
erful 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 348).
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.
Yo u can pr event the additional door lock from
being activated bydeactivating interior pr otection
before locking theve hicle (/ page 109). U Unloc
nloc king/opening t
king/opening t he door
he doors fr
s from t
om t he inside
he inside #
U
Unitnit ed Kingdom only
ed Kingdom only :
:obser vethe no tes on
th e additional door lock (/ page 84).84
84
Opening and closing
Page 226 of 541

R
The incline must not be greater than 30%.
A
A ctiv
ctiv ating/deactiv
ating/deactiv ating t
ating the HOLD function
he HOLD function &
W
WARNING
ARNING Risk of an accident due tothe
HOLD function being active when you
lea vetheve hicle
If th eve hicle is only braked with the HOLD
function it could, in thefo llowing situations,
ro llawa y:
R Ifth ere is a malfunction in the system or in
th e po wer suppl y.
R Ifth e HOLD function is deactivated by
depressing the accelerator pedal or brake
pedal, e.g. byave hicle occupant. #
Always secure theve hicle against rolling
awa y before you lea veit. R
R
eq
eq uir
uir ements:
ements:
R The vehicle is stationar y.
R The driver's door is closed or the seat belt on
th e driver's side is fastened.
R The vehicle has been star ted.
R The electric parking brake is released. R
Active Distance Assist DISTRONIC is deactiva-
te d.
R The transmission is in position h,kori.
A
A ctiv
ctiv ating t
ating t he HOLD function
he HOLD function #
Depress the brake pedal, and aTer a short
time quickly depress fur ther until theë
display appears in the driver's displa y. #
Release the brake pedal.
Deactiv
Deactiv ating t
ating the HOLD function
he HOLD function #
Depress the accelerator pedal topull away.
or #
Depress the brake pedal until theë display
disappears from the driver's displa y.
The HOLD function is deactivated in thefo llowing
situations:
R Active Distance Assist DISTRONIC is acti va-
te d.
R The transmission is shiTed toposition j.
R The vehicle is secured with the electric par k-
ing brake. In
thefo llowing situations, theve hicle is held by
transmission position jand/or bythe electric
parking brake:
R The seat belt is unfastened and the driver's
door is opened.
R The vehicle is switched o..
R There is a system malfunction.
R The po wer supply is insu1cient.
In addition, theBrake immediately message may
appear in the driver's display and a horn tone may
sound at regular inter vals. #
Immediate lydepress the brake pedal /rmly
until thewa rning message disappears.
The HOLD function is deactivated. #
Additionally secure theve hicle against rolling
awa y. F F
unction of Hill St
unction of Hill Star
art Assist
t Assist Hill
Start Assist holds theve hicle for a short time
when pulling away on a hill under thefo llowing
conditions:
R The transmission is in position hork. Driving and parking
223
223
Page 463 of 541

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions #
Release the electric parking brake manuall y.
!
Parking brake Switch on
vehicle to release *T
hered! indicator lamp is lit.
Yo u ha veattem pted torelease the electric parking brake with theve hicle switched o.. #
Switch on theve hicle.
J Brake immediately *A
malfunction has occur red while the HOLD function was activated.
A horn may also sound at regular inter vals.
Yo u cannot start theve hicle system. #
Immediately depress the brake pedal /rmly until the display message disappears.
Yo u cannot start theve hicle system again.
J Malfunction See Owner's
Manual *T
he brake forc e boosting function is impaired.
The hill start assist may be impaired. &
W WARNING
ARNING Risk of an accident due toa brake system malfunction
If th e brake system is malfunctioning, braking characteristics may be impaired. #
Drive on carefull y. #
Have the brake system checked immediately at a quali/ed specialist workshop. 460
460
Displ
aymessages and warning/indicator lamps