battery MERCEDES-BENZ E-CLASS COUPE 2020 Owner's Guide

Key
Display messages
Possible causes/consequences and M
MSolutions
À Replace key See Owner's
Manual *O
nly a few or no authorisations remain forst arting the engine. #
Order a new digital vehicle keyst icke r from a Mercedes-Benz service centre.
Á
Replace key *T
hekey needs tobe replaced. #
Consult a qualified specialist workshop.
Á Change key batteries *T
hekey bat tery is dischar ged. #
Replace the battery (/ page72). Display messages and
warning/indicator lamps 369

Climate control
Displ
aymessages
Possible causes/consequences and M
MSolutions
& inoperative See Owner's
Man. *T
hestationary heater is temp orarily malfunctioning. #
When theve hicle is stationary on a le vel sur face and the engine has cooled down, make up tofour attem ptsto
switch on thest ationary heater, waiting se veral minutes between each attem pt. #
Ifth est ationary heater does not swit chon, consult a qualified specialist workshop.
&
inoperative Battery low *T
he on-board electrical sy stem voltage is too lo w.
The stationary heater has swit ched itself off. #
Drive an extended di stance until the battery has reached a suf ficient charge leve l again.
&
inoperative Refuel vehicle *T
here is too little fuel in the fuel tank. The stationary heater cannot be swit ched on. #
Refuel theve hicle. 374
Displaymessa ges and warning/indicator lamps

Ve
hicle Display messages
Possible causes/consequences and M
MSolutions
d Vehicle is operational
Switch off ignition before
exiting *Y
ou are leaving theve hicle when it is in a ready-to-drive state. #
When you lea vetheve hicle, switch off the ignition, secure theve hicle against rolling away and take theke y with
yo u. #
Ifyo u do not lea vetheve hicle, switch off the electrical consumers, e.g. the seat heating. Otherwise, the12 V
battery may dischar geand it will then be possible tostart theve hicle only with the aid of a second battery
(s ta rting assis tance).
ï Check trailer hitch lock *T
he trailer hitch is not operational during a journey with a trailer. &
WARNING Risk of an accident if the ball neck is not loc ked
The trailer may become de tach ed. #
Stop theve hicle immediately in accordance with the traf fic conditions. Do not continue driving. #
Uncouple the trailer and secure it against rolling away. #
Initiate a new swivel mo vement and do not re-couple the trailer until thewa rning/indicator lamp goes out. #
When the display message disappears, couple up the trailer and drive on.
If th e display message does not disappear, the trailer hitch is malfunctioning and the ball neck is not loc ked. #
Do not couple up the trailer. Drive on without the trailer. No tethere duced ground clearance due tothe
unlo cked ball nec k. Displ
aymessa ges and warning/indicator lamps 375

Display messages
Possible causes/consequences and M
MSolutions
Stop vehicle Leave engine
running Wait Transmission
cooling *T
he transmission is overheating. Pulling away may be temp orarily impaired or not possible. #
Stop theve hicle immediately in accordance with the traf fic conditions. Do not continue driving. #
Lea vethe engine running. #
Wait until the display message disappears before pulling away.
Auxiliary battery malfunc-
tion *T
he auxiliary batteryforth e transmission is no longer being charge d. #
Consult a qualified specialist workshop. #
Untilthen, alw ays select park position jmanually before you swit choff the engine. #
Before leaving theve hicle, apply the electric parking brake. Brakes
Display messages
Possible causes/consequences and M MSolutions
! Parking brake See Owner's
Manual *
The yellow ! indicator lamp is lit. The elect ric pa rking brake is malfunctioning.
To appl y: #
Switch the ignition off and switch it back on. #
Apply the electric parking brake manually (/ page181).
If it is not possible toapply the electric parking brake: #
Consult a qualified specialist workshop. 384
Display messages and warning/indicator lamps

Battery
Displ
aymessages
Possible causes/consequences and M
MSolutions
# 12 V battery See Owner's
Manual *T
he engine is off and thech arge leve l is too lo w. #
Switch off electrical consumers that are not required.
To charge the12 V battery: #
Lea vethe engine running for a few minutes, or drive an extended di stance.
*I fth e message appears while the engine is running, this indicates an on-board elect rical sy stem malfunction. #
Consult a qualified specialist workshop.
# See Owner's Manual *T
he12 V battery is not being charge d.
* NO
TEPossible engine damage if you continue driving #
Do not continue driving under any circum stances. #
Consult a qualified specialist workshop. #
Stop theve hicle immediately in accordance with the traf fic conditions and switch off the engine. #
Consult a qualified specialist workshop. 406
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and M
MSolutions
# Stop vehicle See Owner's
Manual *T
he12 V battery is no longer being charge d and thech arge leve l is too lo w.
* NO
TEPossible engine damage if you continue driving #
Do not continue driving under any circum stances. #
Consult a qualified specialist workshop. #
Stop theve hicle immediately in accordance with the traf fic conditions. Do not continue driving. #
Switch off the engine. #
Consult a qualified specialist workshop.
# Stop vehicle Leave engine
running *T
he12 V battery charge leve l is too lo w. #
Stop theve hicle immediately in accordance with the traf fic conditions. Do not continue driving. #
Lea vethe engine running. #
Wait until the display message disappears before pulling away. #
Ifth e display message does not disappear: consult aqualified specialist workshop.
Û 48 V battery See Owner's
Manual *T
he 48 V on-board electrical sy stem has function restrictions. Comfort functions may be restricted. #
Consult a qualified specialist workshop immediatel y. Displ
aymessa ges and warning/indicator lamps 407

Display messages
Possible causes/consequences and M
MSolutions
Ý Please wait 48 V battery
charging *T
he 48 V battery is dischar ged. You ha veswitched on the ignition while the12 V battery was being charge d with a
suitable charge r or while ano ther vehicle was pr oviding starting assis tance.
The discha rged 48 V battery is charge d automatically via thevo ltage con verter. Af ter a few minutes, theMotor can
be started again display message will be shown on the multifunction displa y. #
Start the engine. #
Drive theve hicle for a while tocharge the12 V battery and the 48 V battery af ter disconnecting thech arger
from theve hicle.
If th eMotor can be started again display message does not appear af ter a few minutes: #
Tryto start the engine again. #
Ifth e engine does not start, consult a qualified specialist workshop.
Cannot start engine See
Owner's Manual *T
hecharge leve l of the 48 V battery is too lo w.You can no lon gerst art the engine. #
Switch off electrical consumers that are not required. #
Connect a suitable charge r appro vedfo r Mercedes-Benz with suf ficient charge output tothe jump-s tart connec‐
tion point of the12 V battery (/ page 321).
The 48 V battery is charge d via thevo ltage con verter in theve hicle.
Motor can be started again *T
he 48 V battery has been charge d automatically via thevo ltage con verter. #
Start the engine and drive theve hicle for a while tocharge the12 V battery and the 48 V batter y. 408
Display messages and warning/indicator lamps

1,
2, 3 ...
4MATIC ..................................................... 17 0
Fu nction .............................................. 17 0
12 V battery
see Battery (vehicle)
12 V so cket
see Soc ket (12 V)
48 V on-board electrical sy stem
Operating saf ety .................................... 22
360° Camera ............................................ 217
Care .................................................... 305
Fu nction ............................................... 217
Opening the camera co ver (r eve rsing
camera) .............................................. .221
Selecting a view ................................... 221
Switching au tomatic operation
on/off (r eversing camera) .................. .221 A
A/C function Activating/deactivating (MBUX mul‐
timedia sy stem) ................................... 14 2
Switching on/off (control panel) ......... 14 2ABS (Anti-lock Braking Sy
stem) ............ .185
Ac celeration
see Kickdown
Ac cident and Breakdown Manage‐
ment
Mercedes me connect ........................ .275
Ac oustic locking verification signal
Ac tivating/deactivating ......................... 71
Ac tive Blind Spot Assi st......................... 230
Ac tivating/deactivating ...................... .233
Brake application ................................. 232
Fu nction .............................................. 230
Sy stem limitations ...............................2 30
Tr ailer operation .................................. 232
Ac tive bonn et(pedestrian pr otection) .. 296
Operation ............................................ 296
Re setting ............................................. 296
Ac tive Brake Assi st
Fu nction/no tes ................................... 188
Setting ................................................. 19 2
Ac tive Di stance Assist DISTRO NIC........ 19 6
Ac tive Emergency Stop Assist .............2 05
Calling up a speed ............................... 19 9Fu
nction .............................................. 19 6
Increasing/decreasing speed .............. 19 9
Re quirements: .................................... .199
Ro ute-based speed adap tation ........... .202
Selecting ............................................. 19 9
St eering wheel buttons ........................ 19 9
St oring a speed ................................... 19 9
Switching off/deacti vating .................. 19 9
Switching on/activating ...................... 19 9
Sy stem limitations ...............................1 96
Ac tive Eme rgency Stop Assist ...............205
Ac tive headlamps .................................... 12 6
Ac tive Lane Keeping Assist .................... 233
Ac tivating/deactivating ...................... .236
Ac tivating/deactivating thewa rning .. .236
Fu nction .............................................. 233
Setting the sensitivity .......................... 236
Sy stem limits ....................................... 233
Tr ailer operation .................................. 233
Ac tive Parking Assist .............................. 222
Exiting a parking space ...................... .225
Fu nction .............................................. 222
Pa rking ................................................ 223
Sy stem limitations ...............................2 22 Index
433

Air-conditioning sy
stem
see Climate control
Air-recirculation mode ............................14 4
Air-water duct .......................................... 302
Ke eping free ........................................3 02
Airbag ........................................................ .42
Ac tivation .............................................. 36
Fr ont airbag (driver, front passenger) ....42
Ins tallation locations ............................ .42
Knee airbag ........................................... 42
Overview ............................................... 42
PA SSENGER AIR BAG indicator lamp .... .47
Pr otection ..............................................43
Re duced pr otection ...............................44
Side airbag ............................................ 42
Wi ndow airbag ....................................... 42
Ai rflow
Setting ................................................ .141
AIRS CARF
Ad justing the outlets ........................... 15 0
Switching on/off ................................. 105
Alarm sy stem
see ATA (anti-theft alarm sy stem) All-wheel drive
see 4MATIC
Ambient lighting Setting (multimedia sy stem) ................1 32
Android Auto
see Smartphone integration
Animals Pets in theve hicle ................................. 69
Anti-lock braking sy stem
see ABS (Anti-lock Braking Sy stem)
Anti-skid chains
see Snow chains
Anti-theft pr otection
Ad ditional door lock .............................. 73
Immobiliser ............................................ 91
Anticipatory occupant pr otection
see PRE- SAFE®
(anticipatory occu‐
pant pr otection)
see PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus)
Apple CarPlay ®
see Smartphone integration Assistance sy
stems
see Driving saf ety sy stem
ASS YST PLUS ........................................... 295
Battery disconnection pe riods .............2 96
Displ aying the service due date ........... 295
Fu nction/no tes ................................... 295
Re gular maintenance work .................. 295
Special service requ irements .............. 295
ATA (anti-theft ala rmsystem) .................. .91
Deactivating the alarm .......................... 92
Fu nction ................................................ 91
Fu nction of interior pr otection ............... 93
Priming/deactivating interior pr otec‐
tion ........................................................ 93
Priming/deactivating tow- aw ay pro‐
te ction ................................................... 93
To w- aw ay protection function ................92
AT TENTION ASSI ST......................... 22 7, 228
Fu nction .............................................. 227
Setting ................................................. 228
Sy stem limitations ...............................2 27
At tention assistant
see ATTENTION ASSIST Index
435

Au
thorised workshop
see Qualified specialist workshop
Au tomatic distance control
see Active Dis tance Assi stDISTRONIC
Au tomatic driving lights .........................124
Au tomatic engine start (ECO start/
sto p function) .......................................... 16 0
Au tomatic engine stop (ECO start/
sto p function) .......................................... 16 0
Au tomatic front passen ger front air‐
bag deacti vation sy stem
see Automatic front passenger front
airbag shutoff
Au tomatic front passen ger front air‐
bag shu toff ........................................... 45, 47
Fu nction of the automatic front
passenger front airbag deactivation
sy stem ................................................... 45
PA SSENGER AIR BAG indicator lamp .... .47
Au tomatic mir rorfo lding function
Ac tivating/deactivating ...................... .139
Au tomatic seat adjustment
Setting ................................................. 100Au
tomatic transmission
DIRECT SELECT le ver ........................... 16 6
Drive program display .......................... 16 5
Drive programs .................................... 16 4
DY NA MIC SELECT switch .................... 16 4
Engaging drive position ....................... 16 8
Engaging neutral .................................. 167
Engaging pa rkposition ........................ 16 8
Engaging reve rsege ar ........................ .167
Kickdown ............................................. 16 9
Manual gear changing ........................ .168
St eering wheel gearshift paddles ........ .168
Tr ansmission position display .............. 16 6
Tr ansmission positions ........................ 16 6
Axle load Perm issible .......................................... 349
Tr ailer operation .................................. 364 B
Bag hook .................................................. .116
Ball ne ck
Extending/r etra cting (MBUX multi‐
media sy stem) .....................................2 38
Fo lding out/in .................................... .237 BA
S (Brake Assist Sy stem) .................... .185
Battery Key ........................................................ 72
Re mo tecontrol (s tationary heater) ...... 14 8
Battery see Battery (vehicle)
Battery (vehicle) ...................................... 322
Charging .............................................. 321
Charging (Remo teOnline) .................... 15 5
No tes ................................................... 317
No tes (s tarting assis tance and
ch arging) .............................................. 319
Re placing ............................................ 322
St arting assis tance .............................. 321
Belt see Seat belt
Bic ycle rack
Load capacity ...................................... 363
Tr ailer operation .................................. .241
Blind Spot Assi st..................................... 230
Ac tivating/deactivating ...................... .233
Fu nction .............................................. 230
Sy stem limitations ...............................2 30436
Index