Page 425 of 521
Displa
ymessages
Possible causes/consequences and M
MSolutions
! Release parking brake *
The red! indicator lam pflashes.
The electric parkin gbrake is applied while driving:
R Acondition fora utom aticrelease of thee lectric parking brak eisnotfulfilled .
R Youa reper form ing emer gency braking using thee lectric parking brak e. #
Chec kthat thec onditions fora utom aticrelease of thee lectric parking brak earefulfilled. #
Release thee lectric parking brak emanually. 422
Displa ymessages and warning/indicator lamps
Page 426 of 521

Displa
ymessages
Possible causes/consequences and M
MSolutions
! Parking brake See Owner's
Manual *
The yellow ! indicator lam pislit. The elect ricp arkin gb rake is malfunctioning.
To appl y: #
Switc hoffthei gnition and switc hitbacko n. #
Appl ythe electric parking brak emanually .
If it is no tpossible toappl ythe electric parking brake: #
Consult aqualified specialis tworks hop. #
Wher enecessar y,also safeguar dthe par kedv ehicle agains trolling away.
The yellow ! indicator lam pand ther ed ! indicator lam parelit. The elect ricp arkin gb rake is malfunction‐
ing.
To release: #
Swit chofft he ignition and switc hitbacko n. #
Release thee lectric parking brak emanually .
or #
Release thee lectric parking brak eautomaticall y.
If it is still no tpossible torelease thee lectric parking brake: #
Do no tcontinue driving under an ycircums tances. Consult aqualified specialis tworks hop.
The yellow ! indicator lam pislit and ther ed ! indicator lam pisflashing. The electric parkin gbrake is mal‐
functioning.
The electric parkin gbrake coul dnotbe applied or released. Displa
ymessages and warning/indicator lamps 423
Page 427 of 521
Displa
ymessages
Possible causes/consequences and M
MSolutions #
Switc hoffthei gnition and switc hitbacko n.
To appl y: #
Release and then apply thee lectric parking brak emanuall y.
To release: #
Appl yand then release thee lectric parking brak emanuall y.
If it is no tpossible toappl ythe electric parking brak eorthered ! indicator lam pcontinues toflash: #
Do no tcontinue drivin gunde rany circum stances. Consult aqualified specialis tworks hop. #
Wher enecessar y,also safeguar dthe par kedv ehicle agains trolling away.
The yellow ! indicator lam pislit and ther ed ! indicator lam pflashes fora pproxima tely tens econds af ter
th ee lectric parking brak ehas been applied or released. It then remains lit or goes out. The electric parking brak eis
malfunctioning.
If th eb attery charge leve list oo lo w: #
Char getheb atter y.
To appl y: #
Switc hoffthei gnition.
The electric parking brak eisapplied automaticall y.424
Displa ymessages and warning/indicator lamps
Page 428 of 521

Displa
ymessages
Possible causes/consequences and M
MSolutions
If th ee lectric parking brak eshould no tbeapplied, lea vethei gnition switched on, e.g. when washing thev ehicle in
an automatic car wash or when having thev ehicle towe d. Do no tdothis when having thev ehicle towe dw itht he
re ar axle raised.
If th ee lectric parking brak eisnotapplied automatically: #
Switc hoffthei gnition and switc hitbacko n. #
Release and then apply thee lectric parking brak emanuall y.
If it is still no tpossible toappl ythe electric parking brake: #
Consult aqualified specialis tworks hop. #
Wher enecessar y,also safeguar dthe par kedv ehicle agains trolling away.
To release: #
Ifth ec onditions fora utom aticrelease ar efulfilled and thee lectric parking brak eisnotreleased automaticall y,
re lease thee lectric parking brak emanuall y.
If it is still no tpossible torelease thee lectric parking brake: #
Do no tcontinue driving under an ycircums tances. Consult aqualified specialis tworks hop. Displa
ymessages and warning/indicator lamps 425
Page 429 of 521

Displa
ymessages
Possible causes/consequences and M
MSolutions
J Check brake fluid level *T
her eisi nsufficient brak efluid in theb rake fluid reser voir. &
WARNING Risk of an accident du etolowbrak efluid le vel
If th eb rake fluid le velist oo lo w,theb raking ef fect and theb raking characteristic smaybe impaired. #
Pull overand stop thev ehicle safely as soon as possible, paying attention toroad and traf ficc onditions.
Do no tcontinu edriving under an ycircums tances. #
Consult aqualified specialis tworks hop.
Do no ttop up theb rake fluid. #
Pull overand stop thev ehicle safely as soon as possible, paying attention toroad and traf ficc onditions .Donot
continu edriving under an ycircums tances. #
Consult aqualified specialis tworks hop.
Do no ttop up theb rake fluid.
#
Chec kbrak epad wear *T
he brak elinings ha vereached thew ear limit. #
Consult aqualified specialis tworks hop.
G Inoperative *O
ne or mor emainf unctions of theM ercedes me connect sy stem ar emalfunctioning. #
Consult aqualified specialis tworks hop. 426
Displa ymessages and warning/indicator lamps
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Displa
ymessages
Possible causes/consequences and M
MSolutions
Active Brake Assist Func-
tions currently limited See
Owner's Manual *
Ve hicles with theD riving Assistance Package: ActiveB rake Assi stwit hc ross-traf ficf unction, Evasi veSteering
Assis torP RE‑SAFE ®
PLUS ar etemporarily una vailable or onl ypartiall yavailable.
Ve hicles without theD riving Assistance pa ckage: ActiveB rake Assi stistemp orarily una vailable.
The ambien tcondition sareoutside thes ystem border s. #
Driv eon.
As soon as thea mbient conditions ar ewithin thes ystem borders, thes ystemw ill become available again. #
Ifth ed ispla ymessag edoes no tdisappear ,stopt he vehicle while paying attention toroad and traf ficc onditions
and restar tt he engine.
Active Brake Assist Func-
tions limited See Owner's
Manual *
Ve hicles with Drivin gAssistanc ePacka ge: ActiveB rake Assi stwit hc ross-traf ficf unction, Evasi veSteering
Assis torP RE‑SAFE ®
PLUS is malfunctioning.
Ve hicles without theD riving Assistance Package: ActiveB rake Assi stis malfunctioning. #
Consult aqualified specialis tworks hop.
PRE-SAFE inoperative See
Owner's Manual *
PRE‑SAFE ®
functions ar emalfunctioning. #
Consult aqualified specialis tworks hop. Displa
ymessages and warning/indicator lamps 427
Page 431 of 521
Displa
ymessages
Possible causes/consequences and M
MSolutions
Radar sensors dirty See
Owner's Manual *T
heradar sensor sy stem is malfunctioning. Possible causes:
R soiling of thes ensors
R heavy rain
R extende dcountr ydriving wi thout other traf fic, e.g. in thed esert
Driving sy stems and driving saf etys ystems ma ybem alfunctioning or temp orarily una vailable.
Onc ethe cause of thep roblem is no longer present ,driving sy stems and driving saf etys ystems ar eavailable again.
If th ed ispla ymessag edoes no tdisappear: #
Pull overand stop thev ehicle safely as soon as possible, paying attention toroad and traf ficc onditions. #
Clea nallsenso rs . #
Restar tt he engine. 428
Displa ymessages and warning/indicator lamps
Page 432 of 521
Displa
ymessages
Possible causes/consequences and M
MSolutions
Radar sensors dirty See
Owner's Manual *T
heradar sensor sy stem is malfunctioning. Possible causes:
R soiling of thes ensors
R heavy rain
R extende dcountr ydriving wi thout other traf fic, e.g. in thed esert
Driving sy stems and driving saf etys ystems ma ybem alfunctioning or temp orarily una vailable.
Onc ethe cause of thep roblem is no longer present ,driving sy stems and driving saf etys ystems ar eavailable again.
If th ed ispla ymessag edoes no tdisappear: #
Pull overand stop thev ehicle safely as soon as possible, paying attention toroad and traf ficc onditions. #
Clea nallsenso rs . #
Restar tt he engine. Displa
ymessages and warning/indicator lamps 429