engine MERCEDES-BENZ E-CLASS CABRIOLET 2018 Service Manual

Select one ofthefo llowing settings:
00BB(DUO\ :yo ur selection isretained when the
ve hicle is next star ted.
00BB0HGLXP :yo ur selection isretained when the
ve hicle is next star ted.
00BB/DWH: your selection isretained when the
ve hicle is next star ted.
00BB2II:
Ve hicles without Driving Assistance pack‐
age: The dis tance warning function and the
autonomous braking function are deactiva‐
te d. When theve hicle is next star ted, the
middle setting is auto matically selected.
Ve hicles with Driving Assistance pack‐
age: The dis tance warning function and the
autonomous braking function are deactiva‐
te d. Evasive Steering Assist is una vailable.
When the ignition is next star ted, the middle
setting is selected automatically and Evasive
St eering Assist is available.
00CE When Active Brake Assi stis deactivated, the
00D4 symbol appears inthe assis tance
graphic in the multifunction displa y.
Speed control cruise control
Function of cruise control
Cruise cont rol accelerates and brakes theve hi‐
cle automatically in order tomaintain a pr evi‐
ously stored speed.
If yo u accelerate toove rtake, forex ample, the
st ored speed is not dele ted. If youre mo veyour
fo ot from the accelerator pedal af terove rtaking,
cruise control will resume speed regulation back
to thestored speed.
Yo u can operate cruise cont rol with the cruise
control le ver.
If yo ufa ilto adapt your driving style, cruise con‐
trol can neither reduce therisk of an accident
nor override the la wsof ph ysics. It cannot take
into account road, weather or traf fic conditions.
Cruise control is only an aid. You are responsible
fo rth e dis tance totheve hicle in front, forve hi‐
cle speed, for braking in good time and forst ay ‐
ing in lane.
Sy stem limitations
Cruise control may be unable tomaintain the
st ored speed on uphill gradients. The stored
speed is resumed when the gradient evens out. Change into a lo
werge ar in good time on long
and steep downhill gradients. Take particular
no te ofthis when driving a laden vehicle. By
doing so, you will make use of the braking ef fect
of the engine. This relie vesth e load on the brake
sy stem and pr events the brakes from overheat‐
ing and
wearin
g tooqu ickl y.
Do not use cruise control in thefo llowing situa‐
tions:
RIn traf fic situations whi chrequ ire frequent
ch anges of speed, e.g. in heavy traf fic, on
winding roads.
ROn slippery roads. Accelerating can cause
th e drive wheels tolose traction and the
ve hicle could then skid.
RIfyo u are driving when visibility is poor.
Ope rating cruise control
0071
WARNING Risk of accident due to
unkno wnstored speed
If yo u call up thestored speed and this is
lo we rth an your cur rent speed, theve hicle
decelerates.
16 0
Driving and pa rking

Ifyo udo not kn owthestored speed, the
ve hicle could decelerate unexpectedl y.
00BBTake into account the tra ffic situation
before calling up thestored speed.
00BBIf th estored speed is not known, store
th e desired speed again.
Change into a lo werge ar in good time on long
and steep downhill gradients. Take particular
no te ofthis when driving a laden vehicle. By
doing so, youwill make use of the braking ef fect
of the engine. This relie vesth e load on the brake
sy stem and pr events the brakes from overheat‐
ing and wearing tooqu ickl y.
Re quirements:
RCruise control is selected.
RESP®must be activated, but not inter vening.
RThe driving speed must be at least15mp h
(20 km/h).
00BBSt ore cur rent speed 2(once af terst arting
th eve hicle).
or
00BBCall up stored speed 2.00BBDeactivate cruise contro l1.
00BBPress the le ver brief ly:th estored speed is
increased 3orreduced
4 by1mp h (1 km/h).
or
00BBPress the le ver be yond the pressure point:
th estored speed is increased 3orreduced
4 by5mp h (10 km/h).
If cruise contro l has been deactivated, the cur‐
re nt driven speed is adop ted with 3or4.
Driving and parking 16
1

0071WARNING Risk of accident due toActive
Dis tance Assist DISTRONIC still being
activated when you lea vethe driver's
seat
If yo u lea vethe driver's seat while theve hicle
is being braked byActive Dis tance Assist
DISTRONIC only, theve hicle can rollaw ay.
00BBAlw ays deactivate Active Dis tance
Assist DISTRONIC and secure theve hi‐
cle topreve nt it from rolling away
before you lea vethe driver's seat.
Re quirementsRThe vehicle's engine must be switched on.
RThe electric parking brake must be released.
RAc tive Parking Assist is not being used to
park theve hicle or toexit from a parking
space.
RESP®must be activated, but not inter vening.
RThe transmission must be in position005B.
RThe driver door, front passenger door and the
re ar doors must be closed.
RThe engine hood must be closed.
00BBRe mo veyour foot from the accelerator pedal.
00BBTo store cur rent speed 2.
Yo ur vehicle adapts its speed tothat of the
ve hicle in front, but only up tothestored
speed.
or
00BBCall up stored speed 2.
00BBOron vehicles with Driving Assistance
Pa ckage and Traf fic Sign Assis t:the dis‐
pla yed speed limit is adop ted, if available 2.
00BBDeactivate Active Dis tance Assist DISTRONIC
1.
00BBIncrease 3orreduce 4the speed.
16 6
Driving and pa rking

RIfth e HOLD function is deactivated by
depressing the accelera tor pedal or the
brake pedal, e.g. byave hicle occupant.
RIfth e electrics in the engine compart‐
ment, the battery or the fuses are tam‐
pered with or if the battery is disconnec‐
te d.
00BBAlw ays deactivate the HOLD function
and secure theve hicle against rolling
aw ay before leaving theve hicle.
0075 NO
TEDama gefrom au tomatic braking
When Active Brake Assi st,Ac tive Dis tance
Assist DISTRONIC or the HOLD function are
activated, theve hicle brakes autonomously
in cer tain situations.
To avo id damage totheve hicle, deactivate
th ese sy stems in thefo llowing or similar sit‐
uations:
00BBDuring towing
00BBIn a car wash
Requirements:RThe vehicle is stationar y.
RThe driver's door is closed or the seat belt on
th e driver's side is fastened.
RThe engine is running or has been au tomati‐
cally switched off bythe ECO start/ stop
function.
RThe electric parking brake is released.
RAc tive Dis tance Assist DISTRONIC is not acti‐
va ted.
RThe transmission is in position 005B,005Eor005C.
Ac tivating the HOLD function
00BBDep ress the brake pedal and af ter a short
time depress fur ther until the00D9 display
appears in the multifunction displa y.
00BBRelease the brake pedal.
Deactivating the HOLD function
00BBDepress the accelerator pedal topull away.
or
00BBDepress the brake pedal until the00D9 dis‐
play disappears from the multifunction dis‐
pla y. The HOLD function is deactivated in
thefo llow‐
ing situations:
RWhen Active Dis tance Assist DISTRONIC is
acti vated.
RThe transmission is switched toposition 005D.
RWhentheve hicle is secured with the electric
parking brake.
In thefo llowing situations, theve hicle is held by
th e transmission position 005Dorby the electric
parking brake:
RWhen the seat belt is unfas tened and the
driver's door is opened.
RWhen the engine is switched off.
RWhen there is a malfunction in the sy stem or
if th e po wer supp lyis insuf ficient.
AIR BODY CONT ROL
AIR BODY CONT ROL function
AIR BODY CONTROL is an air suspension sy stem
with variable damping for impr oved driving com‐
fo rt. The all-round le vel control sy stem ensures
th e best possible suspension and const ant
Driving and parking17
1

Vehicles with 360° Camera
1Parking Assist PARKTRONI Cis on ly oper a‐
tional in the front and rear
2Pa rking Assist PARKTRONI Cis operational
and can also warnthe driver about obs tacles
at the side of theve hicle
3Obs tacle de tected at the front right (orange)
and rear (red)
Sa ved obs tacles are del eted in thefo llowing sit‐
uations, forex ample:
RYo uswit choff theve hicle
RYo u open the doors Af
terth e engine is restar ted, obs tacles must be
de tected again, before a new warning can be
issued.
Sy stem limitations
The sy stem limitations forPa rking Assist
PA RKTRONI Cappl yfo r passive side impact pro‐
te ction.
The following objects are not de tected, forex am‐
ple:
RPe destrians who approach theve hicle from
th e side
RObjects placed next totheve hicle
Deactivating/activating PARKTRONIC
0075 NO
TERisk of an accident from objects
at close range
Pa rking Assist PARKTRONI Cma yno tde tect
cer tain objects at close range.
00BBWhen pa rking or maneuvering theve hi‐
cle, pay particular attention toany
objects which are abo veor below the
sensors, e.g. flowe r pots or dr awbars.
The vehicle or other objects could oth‐
erwise be damaged.
If indicator lamp 1is not lit, Parking Assist
PA RKTRONI Cis active. If the indicator lamp is lit
or theé symbol appears in the multifunction
displa y,Pa rking Assist PARKTRONI Cis no t
active.
00BBPress but ton 2.
Driving and pa rking 17
7

You can ha vethefo llowing status information for
AT TENTION ASSIST displa yed in the assis tance
menu of the on-board computer:
RThe length of the journey since the last
break.
RThe attention le vel de term ined byATTENTION
ASSIS T.
If AT TENTION ASSIST is unable tocalculate the
attention le vel and cannot issue a warning, the
6\VWHP 6XVSHQGHG messageappears.
If a warning is given in the Instrument Displa y,
th e multimedia sy stem of fers to sear chfor a rest
area. You can select a rest area and start naviga‐
tion tothis rest area. This function can be activa‐
te d and deactivated in the multimedia sy stem.
If AT TENTION ASSIST is deactivated, the00D7
symbol appears in the assis tance graphic in the
Instrument Display when the engine is running.
AT TENTION ASSIST is activated automatically
when the engine is re-sta rted. The last selected
sensitivity le velre mains stored. Sy
stem limitations
AT TENTION ASSIST is active in the37 mph
(60 km/h) to124mp h (200 km/h) speed range.
The functionality of ATTENTION ASSIST is
re stricted, and warnings may be dela yed or not
occur at all in thefo llowing situations:RIf yo u ha vebeen driving for less than 30
minutes.
RIf th ero ad condition is poor (une venro ad
sur face or po tholes).
RIfth ere is a strong side wind.
RIfyo u adopt a sporty drivingst yle (high cor‐
nering speeds or high rates of acceleration).
RIfth eSt eering Assist function of Dis tance
Assist DISTRONIC is acti ve.
RIfth e time has been set incor rectl y.
RIn active driving situations, if youch ange
lanes and vary your speed frequentl y.
The ATTENTION ASSIST tiredness or alertness
assessment is dele ted and restar ted when con‐
tinuing the journey in thefo llowing situations:
RIf yo u switch offthe engine.
RIfyo u unfas tenyo ur seat belt and open the
driver's door (e.g. change drivers or take a
break).
Setting ATTENTION ASSIST
Multimedia sy stem:
00869HKLFOH00CFk $VVLVWDQFH00CF$77(1
7,21 $66,67
Setting options
00BBSelect 6WDQGDUG, 6HQVLWLYHor2II.
Suggesting a rest area
00BBSelect 6XJJHVW 5HVW $UHD .
00BBActivate 0073or deacti vate the function 0053.
If AT TENTION ASSIST de tects fatigue or
increasing la ckof attention, it suggests a
re st area in the vicinit y.
00BBSelect a sugges tedre st area.
Yo u are guided tothe selected rest area.
19 0
Driving and pa rking

RActive Dis tance Assist DISTRONIC
(→pa ge 162)
0075 NO
TEEngine damage duetoexc essively
high engine speeds
The engine will be damaged if youdriv ewit h
th e engine in theov errevving range.
00BBDo not drive wi th the engine in theove r‐
re vving range.
The fuel supply is inter rupted toprotect the
engine when there d band in tach ome ter3
(o ve rrev ving range) is reached.
During no rmal operating conditions, coolant
te mp erature display 4may rise tothere d
mar k.
0071
WARNING Danger of burn s when open‐
ing the hood
If yo u open the hood when the engine has
ove rheated or during a fire inthe engine
compartment, you could come into contact
wit h hot gases or other escaping operating
fl uids.
00BBBefore opening the hood, allow the
engine tocool down.
00BBIntheeve nt of a fire inthe engine com‐
partment, keep the hood closed and
call thefire service.
Overview of the butto ns onthest eering
wheel
1But ton group:
¤ Main menu and ba ckbutton (on-board
computer)
0063 Switches sound off/on 0081
Increases thevo lume
0082 Decreases thevo lume
2Touch Control (on-board co mputer)
3Touch Control (multimedia sy stem)
4Button group:
¤ Main menu and back button (multime‐
dia sy stem)
£ LINGU ATRO NIC or voice control sys‐
te m
0061 Makes/accepts a call
0076 Rejects/ends a call
Ope rating the on-board co mputer
0071
WARNING Risk of dist raction from infor‐
mation sy stems and communications
equipment
If yo u operate information and communica‐
tion equipment integ rated in theve hicle
when driving, youwill be distracted from the
traf fic situation. This could also cause youto
lose control of theve hicle.
200
Instrument Display and on-board computer

Whenglide mode is active (→page 142),
*OLGLQ J0RGH is displa yed ins tead of the cur‐
re nt fuel consump tion.
A recuperation displ ayis also available for
cer tain engines. If there is only a small
amount of fuel left in the fuel tank, the dis‐
play sho wsave hicle being refueled ins tead
of thera nge.
RECO displ ay(→page 137)
RTrip computer )URP 6WDUWand)URP 5HVHW
RDigital speedomet er
00CE Ve
hicles with an Instrument Display in
th eWi descreen Co ckpit: the digital speed‐
ome ter only appears in the&ODVVLF and6SRUW
designs.Example: standard display
1Trip dis tance
2To tal dis tance recorder
Example: trip compute r
1Total dis tance recorder
2Driving time
3Av erage speed
4Average fuel consum ption
Instrument Display and on-board computer 205

Voice command Function
/LJKW To
display light settings
0DVVDJH To
display massage settings
(QJLQH GDWD To
display engine data
6HDWV To
display seat adjustment settings
&RQVXPSWLRQ To
display consum ption
9LVXDOL]DWLRQ To
display visualization
222
Voice Cont rol Sy stem

ASSYST PLUS serv ice interval display
Fu nction of the ASS YST PLUS serv ice interval
displ ay
The ASS YST PLUS service inter val display in the
instrument display pr ovides information on the
re maining time or dis tance be fore the next
service due date.
Yo u can hidethis service message using the
back button on the left-hand side of thesteering
wheel.
Yo u can obtain fur ther information concerning
th e servicing of your vehicle from a qualified
specialist workshop, e.g. an authorized
Mercedes-Benz Center.
Displaying the service due da te
On-board computer:
00866HUYLFH00CF$66<67 3/86
The next service due date is displa yed.
00BBTo exitth e displa y:press the back button
on the left-hand side of thesteering wheel. Make sure
toobser vethefo llowing fur ther rela‐
te d subjec t:
ROperating the on-board computer
(→page 200).
Car rying out maintenance workatregular
inter vals
0075 NO
TEPremature wearthro ugh failure to
obser veservice due dates
Service workwhich is not car ried out at the
ri ght time or incomple tely can lead to
inc reased wear and damage totheve hicle.
00BBAlw ays obser vethe prescribed service
inter vals.
00BBAlw ays ha vethe prescribed service
wo rkcar ried out at a qualified specialist
wo rkshop.
Special service requ irements
The prescribed service inter val is based on nor‐
mal operation of theve hicle. Maintenance work will need
tobe per form ed more of tenth an
specified if theve hicle is operated under ardu‐
ous conditions or increased loads, forex ample:
Rregular city driving with frequent intermedi‐
ate stops.
Rif th eve hicle is primarily used for short-dis‐
ta nce driving.
Rfor frequent operation in mountainous terrain
or on poor road sur faces.
Rifth e engine is of ten le ftidling for long peri‐
ods.
Rin particula rly dusty condition sand/o rif air -
re circulation mode is frequently used.
In these or similar operating conditions, ha vethe
interior air filter, engine air cleaner, engine oil, oil
fi lter etc. changed more frequent ly.Th etire s
must be checked more frequently if theve hicle
is operated under increased loads. Further infor‐
mation can be obtained at a qualified specialist
wo rkshop.
31 4
Maintenance and care