engine coolant MERCEDES-BENZ E-CLASS CABRIOLET 2018 Owners Manual

1
Speedom eter →
252
2 ÷ ESP®
→
527
3 #! Turn signal lights →
12 9
4 Ð Powe r-assis tedsteering malfunction →
538
5 Multifunction display →
256
6 ! ABS malfunction →
527
7 ; Engine diagnostics →
534
8 Rev counter →
252
9 % Diesel engine: preglow
A ! Electric parking brake applied (red) →
527
B J Brakes (red) →
527
C # Electrical fault →
534
D L Distance warning →
533
E ? Coolant too hot/cold →
534
F Coolant temp erature display →
252
G J Brakes (yellow) →
527 H
! Electric pa rking brake (yellow) →
527
I 6 Restra int sy stem →
31
J ü Seat belt not fastened →
532
K ï Trailer hit chis not operational or is swiv‐
elling →
538
L T Standing lights →
127
M Fuel le vel display
8 Fuelreser vewith fuel filler flap location
indicator →
534
N K High beam →
12 9
O L Low beam →
127
P R Rear fog light →
12 8
Q à Suspension malfunction →
533
R h Tyre pressure monitoring sy stem →
536
S å ESP®
OFF →
527 At
aglance – Warning and indicator lamps 9

1
Speedom eter →
252
2 à Suspension malfunction →
533
3 #! Turn signal indicators →
12 9
4 Multifunction display →
256
5 Rev counter →
252
6 å ESP®
OFF →
527
÷ ESP®
→
527
7 K High beam →
12 9
L Low beam →
127
T Standing lights →
127
8 ? Coolant too hot/cold →
534
9 Coolant temp erature display →
252
A L Distance warning →
533
B Ð Powe r-assis tedsteering malfunction →
538
C # Electrical fault →
534
D J Brakes (red) →
527 E
ü Seat belt not fastened →
532
F Fuel le vel display
G 8 Fuelreser vewith fuel filler flap location
indicator →
534
H R Rear fog light →
12 8
I 6 Restra int sy stem →
31
J % Diesel engine: preglow
K ; Engine diagnostics →
534
L J Brakes (yellow) →
527
M ! Electric pa rking brake applied (red) →
527
N h Tyre pressure monitoring sy stem →
536
O ! ABS malfunction →
527
P ! Electric pa rking brake (yellow) →
527
Q ï Trailer hit chis not operational or is swiv‐
elling →
538 At
aglance – Warning and indicator lamps 11

R
Speed limiter (→ page 199)
R Active Dis tance Assi stDISTRONIC
(→ page 202)
* NO
TEEngine dama gedue toexcessively
high engine speeds The engine will be damaged if
you drive with
th e engine in theov errevving range. #
Do not drive wi th the engine in theove r‐
re vving range. The fuel supply is inter
rupted toprotect the
engine when there d mark on there v counter 3
(o ve rrev ving range) is reached.
During no rmal operating conditions, coolant
te mp erature display 4may rise to120 °C. &
WARNING Danger of bu rns when open‐
ing the bonn et
If yo u open the engine bonn etwhen the
engine has overheated or during a fire inthe
engine compartment, you could come into
contact with hot gases or other escaping
operating fluids. #
Before opening the bonn et, allow the
engine tocool down. #
Intheeve nt of a fire inthe engine com‐
partment, keep the engine bonn et
closed and call thefire service. Ve
hicles with a 48 V on-board electrical sys‐
te m (EQ Boo sttech nology) 1
POWER sho wsthe electric drive support
2 CHARGE sho wsthere cuperation po wer of
th e electric mo tor
õ shows th e drive sy stem's operational read‐
iness . Overview of
the but tons on thest eering
wheel 1
¤ Back/Home button (press and hold),
on-board computer
2 Touch Control, on-board co mputer
3 Control panel for cruise control/limiter or
Ac tive Dis tance Assi stDISTRONIC
4 Control panel for multimedia sy stem:
£ LINGU ATRO NIC
ß Displa ysfavo urites
VO L: control knob, adjusts thevo lume or
switches the sound off 8(press)
6 Makes/accepts a call Instrument Display and on-board computer
253

Ve
hicles with Traf fic Sign Assis t:de tected
instructions and traf fic signs (→ page 237). Ad
justing the in stru ment lighting #
Turn brightness control 1up or down.
The lighting of the instrument display and in
th e control elements of theve hicle interior is
adjus ted. Menus and submenus
Fu
nctions on the service menu of the on-
board compu ter On-board computer:
Service #
Toselect the function: swipe upwards or
down wards on the left-hand Touch Control. #
Press the left-hand Touch Control.
Fu nctions on theService menu:
R Message memory (→ page472)
R AdBlue: Adblue ®
ra nge and fill le vel
R Tyres:
- Restart the tyre pressure loss warning
sy stem (→ page442)
- Che ckthe tyre pressure with the tyre
pressure monitor (→ page 438)
- Restart the tyre pressure monitor
(→ page 439)
R ASSYST PLUS: calls up the service due date
(→ page 391) R
Vehicles with a widescreen cock pit:Cool-
ant: coolant temp erature display
R Engine oil level: engine oil le vel Calling up
the assistant display On-board computer:
Assistance
% Ve
hicles with the instrument display in
th e widescreen cockpit: whenyou ha ve
th e design set toProgressive ,yo u can view
th e assis tant displ ayinthe left-hand area of
th e instrument displa y.
The following displa ysare available on the assis‐
ta nt displ aymenu:
R Assis tant displ ay
R Attention le vel (→ page 235) #
Toswitch between the displa ys:swipe
upwards or down wards on the left-hand
To uch Control. In
stru ment Display and on-board computer 257

Checking
the coolant le vel &
WARNING Risk of bu rns from hot com‐
ponent parts in the engine compartment
Cer tain components in the engine compart‐
ment can be very hot, e.g. the engine, the
ra diator and parts of theex haust sy stem. #
Allow the engine tocool down and only
to uch co mponent parts described in the
fo llowing. &
WARNING Risk of scalding from hot
coolant
The engine cooling sy stem is pressurised,
particularly when the engine is warm. If you
open the cap, you could be scalded byhot
coolant spr aying out. #
Let the engine cool down before open‐
ing the cap. #
When opening the cap, wear pr otective
gl ove s and saf etygl asses. #
Open the cap slowly torelease pres‐
sure. #
Park theve hicle on a le vel sur face. #
Check the coolant temp erature display in the
instrument clus ter.
The coolant temp erature must be below
70 °C. #
Slowly turn cap 1anti-clockwise torelie ve
ov erpressure. #
Continue turning cap 1anti-clockwise and
re mo veit.
The coolant le vel is cor rect:
R ifth e engine is cold, up tomar ker bar 2.
R ifth e engine is warm, up to1.5 cm over
mar ker bar 2. #
If necessar y,top up with coolant that has
been appr ovedby Mercedes-Benz.
R Further information on coolant:
(→ page 467) To
pping up the windsc reen washer sy stem &
WARNING Danger of bu rns from hot
component parts in the engine compart‐
ment
Cer tain component parts in the engine com‐
partment may be very hot, e.g. the engine,
th era diator and parts of theex haust sy stem. 398
Maintenance and care

Yo
u can obtain fur ther information on brake fluid
in thefo llowing places:
R inthe Mercedes-Benz Specifications for
Operating Fluids
- at http://be vo.mercedes-benz.com
- inthe Mercedes-Benz BeVo App
R at a qualified specialist workshop Coolant
Note
s on coolant
Obser vethe no tes on operating fluids
(→ page 459). &
WARNING Risk offire ‑ and inju ryfrom
antifreeze
If antifreeze comes into contact with hot
component parts in the engine compart‐
ment, it may ignite. #
Allow the engine tocool down before
yo uto p up the antif reeze. #
Make sure that no antifreeze spills out
next tothefiller opening. #
Thoroughly clean the antif reeze from
component parts before starting the
ve hicle. *
NO
TEDama gecaused byincor rect cool‐
ant #
Only add coolant that has been pre‐
mixed with therequ ired antifreeze pro‐
te ction.
Information on coolant is available at thefo l‐
lowing locations:
R inthe Mercedes-Benz Specification for
Operating Fluids 310.1
- at http://be vo.mercedes-benz.com
- inthe Mercedes-Benz BeVo app
R at a qualified specialist workshop *
NO
TEOverheating at high outside tem‐
peratures If an inapp
ropriate coolant is used, the
engine cooling sy stem is not suf ficiently pro‐ te
cted against overheating and cor rosion at
high outside temp eratures. #
Alw ays use coolant appr ovedby
Mercedes-Benz. #
Obser vethe instructions in the
Mercedes-Benz Specifications for Oper‐
ating Fluids 310.1. Ha
ve the coolant regularly replaced at a qualified
specialist workshop.
The proportion of cor rosion inhibitor/antifreeze
concentrate in the engine cooling sy stem should
be:
R a minimum of 50% (antifreeze pr otection
down toappr oximately -37 °C)
R a maximum of 55% (antifreeze pr otection
down to-45 °C) Note
s on windscreen washer fluid Obser
vethe no tes on operating fluids
(→ page 459). Te
ch nical da ta467

Display messages
Possible causes/consequences and M
MSolutions
! Clean the fuel filter *
Ve hicles with diesel engines: the fuel filter is dirty or thewate r inthe fuel filter needs tobe drained. #
Consult a qualified specialist workshop.
Top up coolant See Own-
er’s Manual *T
he coolant le vel is too lo w.
* NO
TEEngine dama gedue toinsuf ficient coolant #
Avoid long journe yswith insuf ficient coolant. #
Add coolant (→ page 398).
#
Stop vehicle Leave engine
running *T
he battery charge leve l is too lo w. #
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions. Do not
continue driving under any circums tances. #
Lea vethe engine running. #
Wait until the display message disappears before pulling away.
¸ Replace air cleaner *
Ve hicles with diesel engines: the engine air filter is dirty and must be replaced. #
Consult a qualified specialist workshop. Display messages and
warning/indicator lamps 497

Display messages
Possible causes/consequences and M
MSolutions #
Connect a suitable charge r appro vedby Mercedes-Benz with suf ficient charge output tothe jump-s tart connec‐
tion point of the12 V battery (→ page 424).
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.
? *T
hefan mo tor is defective. #
Avoiding high loads on the engine, drive tothe nearest qualified specialist workshop. In doing so, ensure that
th e coolant temp erature display remains below 120 °C.
?
Coolant Stop vehicle
Switch engine off *T
he coolant is too hot. #
Stop theve hicle immediately, paying attention toroad and traf fic conditions, and switch off the engine. &
WARNING Danger of bu rns when opening the bonn et
If yo u open the engine bonn etwhen the engine has overheated or during a fire inthe engine compartment, you
could come into contact wi thhot gases or other escaping operating fluids. #
Before opening the bonn et, allow the engine tocool down. #
Intheeve nt of a fire inthe engine compartment, keep the engine bonn etclosed and call thefire service. #
Wait until the engine has cooled down. #
Make sure that the air supply tothera diator is not obstructed. Display messages and
warning/indicator lamps 499

Display messages
Possible causes/consequences and M
MSolutions #
Avoiding high loads on the engine, drive tothe nearest qualified specialist workshop. In doing so, ensure that
th e coolant temp erature display remains below 120 °C.
Û
Please wait Charging high-
voltage battery *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.
#
48 V battery See Owner's
Manual *T
he 48 V sy stem is malfunctioning. Con venience functions may be restricted. #
Consult a qualified specialist workshop immediatel y.
8 *T
he fuel supply has dropped into there ser verange. #
Refuel. 500
Displaymessa ges and warning/indicator lamps

Ð
Po
we r-assis tedsteering malfunction
(→ page 538)
à AIR
BODY CONTROL malfunction
(→ page 533)
à DY
NA MIC BODY CONTROL malfunc‐
tion (→ page 533) ;
Engine diagnostics (→
page 534)
% Preglow
# Electrical
fault( →page 534)
8 Fu
elreser vewith fuel filler cap loca‐
tion indicator (→ page 534) ?
Coolant
too hot/cold (→ page 534)
h Ty
re pressure monitor (→ page 536)
ï Tr
ailer hit chis not operational or is
swivelling (→ page 538) Saf
ety sy stems Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
! Re d indicator lamp, elect ric
parking brake applied
!
Ye llow elect ric pa rking
brake indicator lamp is mal‐
functioning The
red elect ric pa rking brake indicator lamp flashes or is lit. The yellow indicator lamp is also lit if the electric parking
brake malfunctions. #
Obser vethe messages on the multifunction displa y. Displ
aymessa ges and warning/indicator lamps 527