2018 MERCEDES-BENZ E-CLASS CABRIOLET service

Non-operational times with the batte rydis‐
connected
The AS SYST PLUS service inter val display
can only calculate the service due da tewhen
th e batte ryis connected.
00BBNotedown the service due date displa yed on
th e instrument display before disconnecting
th e battery (
→page 314).
Engin ecom partment
Active hood (pedestrian pr otection)
Operation of the active hood (pedestrian pro‐
te ction)
In cer tain accident situations, therisk of injury
to pedestrians can be reduced bythe actuation
of the active hood. The rear area of the engine
hood is raised byappr oximately 85 mm.
Fo rth e drive tothewo rkshop, reset the trig‐
ge red active hood yourself. Ifth e active hood
has been triggered, pedestrian pr otection may
be limited. A
qu alified specialist workshop must re-ins tate
th e full functionality of the active hood.
The active hood is not available in all countries.
Re setting the active hood
0071
WARNING Risk of burn s from hot com‐
ponent parts in the engine compartment
Cer tain component parts in the engine com‐
partment can be very hot, e.g. the engine,
th e cooler and parts of theex haust sy stem.
00BBLet the engine cool down and only
to uch the component parts described
as follo ws .
00BBWith your hand flat, push down active hood
1 inthe area around the hinges on bo th
sides (ar rows).
The engine hood must engage in position.
00BBIf th e active hood can be raised slightly at
th ere ar in the area of the hinges, repeat the
st ep until it engages cor rectl y.
Opening/closing the hood
0071
WARNING Risk of accident if the engine
hood is unlatched while driving
An unloc ked engine hood may open up when
th eve hicle is in motion and block your vie w.
00BBNever unlatch the engine hood while
driving.
00BBBefore every trip, ensure that the
engine hood is latched.
Maintenance and care 31
5

0071WARNING Risk of accident and injury
when opening and closing the engine
hood
When opening or closing the engine hood, it
may suddenly drop into the end position.
There is a risk of injury for an yone in the
engine hood's range of mo vement.
00BBOnly open or close the engine hood
when there are no persons in the
engine hood's range of mo vement.
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.
0071
WARNING Risk of injury duetomoving
parts
Cer tain components in the engine compart‐
ment may continue tomo veor suddenly
mo veagain even af terth e ignition has been
switched off, e.g. the cooler fan.
Make sure of thefo llowing before per form ing
ta sks in the engine compartmen t:
00BBSwitchthe ignition off.
00BBNe verto uch the danger zone sur round‐
ing moving co mponent parts, e.g. the
ro tation area of thefa n.
00BBRe mo vejewe lry and watches.
00BBKeep items of clo thing and hair away
from moving parts.
0071 WARNING Risk of injury fromtouching
co mp onent parts under voltage
The ignition sy stem and the fuel injection
sy stem workunder high voltage. If youto uch
co mp onent parts which are under voltage,
yo u could receive an electric shoc k.
00BBNeverto uch co mponent parts of the
ignition sy stem or the fuel injection sys‐
te m when the ignition is switched on.
0071
WARNING Risk of burn s from hot com‐
ponent parts in the engine compartment
Cer tain component parts in the engine com‐
partment can be very hot, e.g. the engine,
th e cooler and parts of theex haust sy stem.
00BBLet the engine cool down and only
to uch the component parts described
as follo ws .
316
Maintenance and care

00BBMake surethat no engine oil is spilled
next tothefiller opening.
00BBAllow the engine tocool off and thor‐
oughly clean the engine oil from compo‐
nent parts before starting theve hicle.
0075 NO
TEEngine damage causedbyan
incor rect oil filter, incor rect oil or addi‐
tives
00BBDo not use engine oils or oil filters
which do not cor respond tothe specifi‐
cations explicitly prescribed forth e
service inter vals.
00BBDo not alter the engine oil or oil filter in
order toachie velonger change inter vals
th an prescri bed.
00BBDo not use additives.
00BBFollow the instructions in the service
inter val display rega rding the oil
ch ange.
0075 NO
TEDama gecaused bytopping up too
much engine oil
Ad ding too much engine oil can cause dam‐
age tothe engine or the catalytic con verter.
00BBHa ve excess engine oil remo ved at a
qu alified specialist workshop.
00BBTu rn cap 1counter-clockwise and remo ve
it.
00BBAd d engine oil.
00BBReplace cap 1and turn it clockwise as far
as it will go.
00BBCheck the oil le vel again (→page 318).
Checking coolant le vel
0071
WARNING Risk of burn s from hot com‐
ponent parts in the engine compartment
Cer tain component parts in the engine com‐
partment can be very hot, e.g. the engine,
th e cooler and parts of theex haust sy stem.
00BBLet the engine cool down and only
to uch the component parts described
as follo ws .
0071
WARNING Danger of burn s from hot
coolant
The engine cooling sy stem is pressurized,
particularly when the engine is warm. If you
Maintenance and care 31
9

00BBIntheeve nt of a fire inthe engine com‐
partment, keep the hood closed and
call thefire service.
0071
WARNING ‑ Risk of fire and injury from
windshield washer concentrate
Wi ndshield washer concentrate is highly
fl ammable. It could ignite if it comes into
con tact wi thhot engine component parts or
th eex haust sy stem.
00BBMake sure that no windshield washer
concentrate spills out next tothefiller
opening.
00BBRe mo vecap 1bytheta b.
00BBAd dwa sher fluid.
Cleaning and care
Informa tiononwashing theve hicle in a car
wa sh
0071
WARNING Risk of accident due to
re duced braking ef fect af terwa shing the
ve hicle
The braking ef fect is reduced af terwa shing
th eve hicle.
00BBAfterth eve hicle has been washed,
brake carefully while paying attention to
th e traf fic conditions until the braking
ef fect has been ful lyrestored.
To avo id damage to yourvehicle when using a
car wash, ensure thefo llowing beforehand:
RTo avo id possible water ingress in theve hi‐
cle, it is preferable touse car washes which
allow the high-pressure pre-wash tobe deac‐
tivated (specification forth e con vertible pro‐
gram).
RIt is imperative toavo id a subsequent hot-
wa x treatment.
Maintenance and care 321

Notes on cleaning and care of the soft top
Obser vethefo llowing information:
Note s on cleaning and car eA voiding soft- top damage
Light soiling
RClean the soft top when dr y.
RRinsewit hclean water.
RNever use gasoline, thinners, tarre mo ver or stain remo ver
or other or ganic sol vents.
RRe mo vebird droppings immediatel y,as they are cor rosive
and can therefore cause the soft- topfabric toleak.
RNe ver use a high-pre ssure cleaner.
RDo not use sharp-edged equipment toremo veice and
sno w.
Norm
alto heavy
soiling
RClean the soft top with a brush and clean water.
RClean stains and other dirt with a brush and soft-top
cleaning agents recommended and appr ovedby
Mercedes-Benz.
RAlw ays brush from front toback in the direction of the
fa bric.
Fr equent cleaning reduces the soft top's resist‐
ance todirt. Torestore the ef fect, clean the soft
to p with the care products and cleaning agents
re commended and appr ovedby Mercedes-Benz.
Incor rect cleaning and care, as well as aging,
can cause the soft- top seams toleak. Ha vethe
soft-top seams sealed at a qualified specialist wo
rkshop, e.g. at your Mercedes-Benz service
cen ter.
00CE Place a suitable co verove rth e soft top if you
plan tolea vetheve hicle outside for a long
period of time.Cleaning AI RCAP
Cleaning the wind deflector
Re quirements:
RThe soft top is closed.
RApply the electric parking brake manually.
RThe ignition is switched on.
Maintenance and care 325

00BBWhen givingstarting assis tance, al ways
make sure that you only connect bat‐
te ry term inals with identical polarity.
00BBDuring starting assis tance, you must
observ eth e described order for con‐
necting and disconnecting the jumper
cables.
00BBDo not connect or disconnect the bat‐
te ry cla mp s while the engine is running.
0071
WARNING Risk ofexplosion during
ch arging process and starting assis tance
During thech arging process and starting
assis tance, the battery may release an explo‐
sive gas mixture.
00BBAv oid fire , open flames, creating spar ks
and smoking.
00BBMake sure that there is suf ficient venti‐
lation du ring thech arging process and
during starting assis tance.
00BBDo not lean over a batter y.
Ifth e indicator/warning lamps in the instrument
clus ter do not light up at low temp eratures, it is
ve ry likely that the dischar ged battery has fro‐
zen.
0071 WARNING Risk ofexplosion from a fro‐
zen battery
A dischar ged battery may freeze at temp era‐
tures slightly abo veor below freezing point.
During starting assis tance or battery charg‐
ing, batte rygas may be released.
00BBAlw aysth aw a frozen batte ryout firs t
before charging it or per form ing start‐
ing assis tance.
The service li feof a battery that has been
th awe d may be dramatically shor tened.
It is recommended that you ha veathaw ed bat‐
te ry checked at a qualified specialist workshop. All
vehicles
0075 NO
TEDama gecaused bynumerous or
ex tended attem ptsto start the engine
Nume rous or extended attem ptsto start the
engine may damage the catalytic con verter
due tonon-combu sted fuel.
00BBAv oid numerous and extended attem pts
to start the engine.
Obser vethefo llowing points during starting
assis tance and when charging the battery:
ROnly use undamaged jumper/charging
cables with a suf ficient cross-section and
insula tedte rm inal clamps.
RNon- insulated parts of thete rm inal clamps
must not come into con tact wi thother me tal
parts while the jumper/charging cable is
connected tothe battery/jump-s tart connec‐
tion point.
RThe jumper/charging cable must not come
into contact wi thany parts which may mo ve
when the engine is running.
Breakdown assist ance34
1

partment and trunk, only usethose fuses
mar ked with an "S". The fuse ratings are li sted in
th e fuse assignment diagram.
Fu se assignment diag ram: onthe fuse box in
th e trunk (
→page 351).
0075 NO
TEDama geor malfunctions caused
by moisture
Moisture may cause dama getothe electrical
sy stem or cause it tomalfunction.
00BBWhen the fuse box is open, make sure
th at no moisture can enter the fuse
box.
00BBWhen closing the fuse box, make sure
th at the seal of the lid is positioned cor‐
re ctly on the fuse box.
Ifth e newly inser ted fuse also blo ws, ha vethe
cause traced and rectified at a qualified special‐
ist workshop, e.g. a Mercedes-Benz Service Cen‐
te r.
Ensure thefo llowing before replacing a fuse:
RThe vehicle is secured against rolling away.
RAll electrical consumers are switched off.
RThe ignition is switched off.
The electrical fuses are located in various fuse
bo xes:
RFu se box on the driver's side of the engine
compartment (→page 349)
RFu se box on the driver's side of the cockpit
(→page 350)
RFu se box in the front passenger foot we ll
(→page 350)
RFu se box in the trunk on theright-hand side
of theve hicle, when vie wed in the direction
of tr avel (
→page 351)
Fuse box in the engine compa rtment
Observ eth e no tes on electrical fuses
(→page 348).
Re quirements:
RYou need a dry clo thand a scre wdriver. Opening
0071
WARNING Risk of injury from usingthe
windshield wipers while the engine hood
is open
When the engine hood is open and the wind‐
shield wipers are set in motion, you can be
trapped bythe wiper linkage.
00BBAlw ays switch off the windshield wipers
and ignition before opening the engine
hood.
Breakdown assis tance 34
9

Tire pressure
Note s on tire pressure
0071
WARNING Risk of accident due toinsuf‐
fi cient or excessive tire pressure
Underinfla ted or overinfla ted tires pose the
fo llowing risks:
RThe tires may bur st, especially as the
load and vehicle speed increase.
RThe tires may wearexc essively and/or
une venly, which may greatlyimpair tire
traction.
RThe driving characteristics, as well as
st eering and braking, may be greatly
impaired.
00BBComply with there commended tire
pressure and check the tire pressure of
all tires including the spare wheel regu‐
larly:
Rat least once a month
Rwhen the load changes
Rbefore embarking on a longe r journey
Rif operating conditionschange, e.g. off-
ro ad driving
00BBAd just the tire pressure as necessar y.
Driving withtire pressure that is too high or too
low can:
RSho rten the service life of the tires.
RCause increased tire damage.
RAd versely af fect driving characteristics and
th us dr iving saf ety, e.g. due toaquaplaning.
0071
WARNING Risk of an accident due to
insuf ficient tire pressure
Ti re s with pressure that is too low can over‐
heat and bur stas a result.
In addition, they also suf fer from excessive
and/or ir regular wear, which can significantly
impair the braking properties and the han‐
dling characteristics.
00BBAv oid excessively low tire pressures in
all the tires, including the spare wheel.
Tire pressure which is too low can cause:
RTire defects as a result of overheating
RImpaired handling characteristics
RIrre gular wear
RIncreased fuel consum ption
0071
WARNING Risk of accident from exces‐
sive tire pressure
Ti re s with excessively high pressure can
bur stbecause they are damaged more easily
by highw ayfill, pot holes etc.
In addition, they also suf fer from ir regular
we ar, which can significantly impair the brak‐
ing properties and the handling characteris‐
tics.
00BBAv oid excessively high tire pressures in
all the tires, including the spare wheel.
Excessively high tire pressure can result in:
RIncreased braking dis tance
RImpaired handling characteristics
RIrre gular wear
354
Wheels and tires