key MERCEDES-BENZ C-CLASS CABRIOLET 2018 Owner's Guide

If the soft top does not open or close fully, the
soft-top hydraulics are depressurized and the
soft top is lowered:
Rafter approximately 7 minutes when the igni-
tion is switched on
Rafter about
20 seconds if the ignition is switched off
Opening/closing with the soft top
switch
Important safety notes
GWARNING
When opening or closing the soft top, there is a risk that parts of the body could become
trapped by moving parts such as the roof
mechanism, the trunk lid, or the side win-
dows. There is a risk of injury.
When opening or closing the roof, make sure
that no parts of the body are in the vicinity of
moving parts. Release the switch if somebody
becomes trapped.
GWARNING
If the vehicle speed exceeds 35 mph
(60 km/h), the soft top stops during the open- ing or closing process. This impairs your view
to the rear. There is a risk of an accident.
Reduce your speed to below 35 mph
(60 km/h) or stop the vehicle in accordance
with the traffic conditions. Press or pull the
soft-top switch again in order to open or close
the soft top fully.
Opening and closing
XMake sure that the trunk partition is closed
(Ypage 90).
XClose the trunk lid.
XTurn the SmartKey to position 2in the igni-
tion lock.
XWhen the vehicle is stationary, depress the
brake pedal and keep it depressed.
XTo open: pull and hold soft top switch :until
the entire soft top is stowed away in the trunk.
The multifunction display shows the opening
process of the soft top.
If, when opening, you drive at speeds above
35 mph (60 km/h), the opening process is
stopped. The Open/Close Convertible
Top Completelymessage is shown in the
multifunction display. In order to open the
soft top fully, reduce your speed again to
below 35 mph (60 km/h) and pull the soft-top
switch again.
XTo close: pull and hold soft top switch :until
the soft top is completely closed.
The multifunction display shows the closing
process of the soft top.
If, when closing, you drive at speeds above
35 mph (60 km/h), the closing process is
stopped. The Open/Close Convertible
Top Completelymessage is shown on the
multifunction display. In order to close the
soft top fully, reduce your speed again to
below 35 mph (60 km/h) and press the soft-
top switch again.
Opening/closing using the SmartKey
Important safety notes
GWARNING
When opening or closing the soft top, there is a risk that parts of the body could become
trapped by moving parts such as the roof
mechanism, the trunk lid, or the side win-
dows. There is a risk of injury.
When opening or closing the roof, make sure
that no parts of the body are in the vicinity of
Soft top89
Opening and closing
Z

moving parts. Release the switch if somebodybecomes trapped.
Opening and closing
The SmartKey must be in close proximity to the
vehicle.
XClose the trunk partition (Ypage 90).
Otherwise only the side windows open.
XTo open: press and hold the %button in
the SmartKey until the soft top is completely
open.
The multifunction display shows the opening
process of the soft top. The seat ventilation is
switched on.
XTo close: press and hold the &button in
the SmartKey until the soft top is completely
closed.
The multifunction display shows the closing
process of the soft top.
Relocking the soft top
Important safety notes
GWARNING
If you do not fully open/close the soft top, the
soft-top hydraulics depressurize after a short
time. This causes the soft top to lower unex-
pectedly and may cause you or others to be
trapped. There is a risk of injury.
Always open or close the soft top completely.
The soft top is not locked if:
Rthe Open/Close Convertible Top Com‐pletelymessage is shown in the multifunc-
tion display
Ryou hear a warning tone for up to ten seconds
when pulling away or while driving
Locking
You can lock the soft top again if it is not locked
fully.
XPull over and stop the vehicle safely as soon
as possible, paying attention to road and traf-
fic conditions.
XTurn the SmartKey to position 2in the igni-
tion lock.
XPress the soft-top switch (Ypage 89).
Trunk partition
General notes
The trunk partition can be used to cover luggage
and loads in the trunk.
The soft top can be opened only when the man-
ual trunk partition is closed. In vehicles with a
partially electrical trunk partition, this automat-
ically closes when the soft top is opened.
!In order to avoid damaging the soft top or
stowed loads, please adhere to the following
while the soft top is open:
Rwhen the trunk partition is open, do not
place any objects in or behind the net on
the side that are too long. These objects
could obstruct the trunk partition or cause
damage to the open soft top.
Rmake sure that the cargo does not push the
trunk partition upwards.
Opening and closing
Depending on the vehicle equipment, your vehi-
cle is installed with a partially electrical or a
manual trunk partition.
90Soft top
Opening and closing

To open:
XAll vehicles:push trunk partition ;using
the handle against the direction of the arrow
to its upper end position.
To close:
XVehicles with a partially electrical trunk
partition: press button :.
Trunk partition ;closes automatically.
iIf the system fails, the partially electrical
trunk partition can be closed manually.
XVehicles with a manual trunk partition:
pull trunk partition ;by the handle in the
direction of the arrow until it rests on the
sides of the trunk.
AIRCAP
Important safety notes
GWARNING
When retracting the AIRCAP, persons could
become caught in the moving mechanism.
There is a risk of injury.
Ensure that persons do not hold onto the
upper frame of the windshield and do not
touch the AIRCAP wind deflector.
With AIRCAP, four people can travel comfortably
with the soft top open. AIRCAP reduces the draft
for the driver and passengers in both the front
and the rear compartment in a vehicle with the
soft top down.
In particularly turbulent air, e.g. when following
a vehicle or in a crosswind, AIRCAP's effect may
be reduced.
AIRCAP has the following components:
Ra wind deflector above the windshield
Ra wind screen behind the two rear-seat head
restraints
When AIRCAP has been activated, the wind
screen extends up between the two rear-seat
head restraints. At the same time, the wind
deflector extends out along the front wind-
shield.
AIRCAP can be activated or deactivated up to
speeds of approximately 100 mph (160 km/h).
Activating and deactivating AIRCAP
XTurn the SmartKey to position 2in the igni-
tion lock.
XTo activate: pull switch:.
The wind screen behind the rear-seat headr-
ests and the wind deflector in the roof frame
extend simultaneously. The indicator lamp in
switch :lights up.
XTo deactivate: press switch:.
The wind screen behind the rear-seat headr-
ests and the wind deflector in the roof frame
retract simultaneously. The indicator lamp in
switch :goes out.
If you park your vehicle with the soft top down
and remove the SmartKey, the wind deflector
and the wind screen retract automatically.
When you restart your engine after having been
parked, the wind deflector and the wind screen
extend again automatically.
AIRCAP cannot be extended or retracted if the
vehicle speed exceeds approximately 100 mph
(160 km/h).
Folding wind screen
Important safety notes
GWARNING
If you use the wind screen in darkness or in
other conditions offering poor visibility, your
view to the rear is further impaired. There is a
risk of an accident.
Only use the wind screen when visibility con-
ditions are good.
Soft top91
Opening and closing
Z

Perform the following steps in sequence on both
sides of the vehicle:
XPull the handle?in the direction of the
arrow.
XAlign folding wind screen :with side fixture
A on the vehicle from above and insert.
XPush handle ?on folding wind screen :
back as far as it will go.
Folding wind screen :is locked.
Removing
XPull handles ?on the left and right one after
the other and slide folding wind screen :out
of fixture Afrom above.
Folding wind screen :is unlocked.
XPull folding wind screen :out of both rear
fixtures =.
XFold in both brackets ;on folding wind
screen :.
XFold folding wind screen :together and
stow it in the bag.
XUse the lashing strap to attach the bag con-
taining the folding wind screen to the through- loading facility behind the rear seats.
Problems with the soft top
ProblemPossible causes/consequences and MSolutions
The soft top will not open
or close.The ignition is not switched on.
XMake sure that the SmartKey is in position 2in the ignition lock.
The trunk lid is open.
XClose the trunk lid (Ypage 83).
The trunk partition is not closed.
XClose the trunk partition (Ypage 90).
The roll bars have been deployed.
XVisit a qualified specialist workshop.
The soft-top mechanism or control system is defective.
XVisit a qualified specialist workshop.
The soft top has been opened and closed several times in a row. The
soft-top drive has been deactivated automatically for safety reasons.
You can open and close the soft top again after approximately ten
minutes.
XSwitch off the ignition and turn it back on.
XRepeat the opening or closing procedure.
Soft top93
Opening and closing
Z

Correct driver's seat position
GWARNING
You could lose control of your vehicle if you do the following while driving:
Radjust the driver's seat, head restraint,
steering wheel or mirrors
Rfasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt before starting the engine.
Observe the following when adjusting steering
wheel :, seat belt ;and driver's seat =:
Ryou are as far away from the driver's air bag as
possible
Ryou are sitting in a normal upright position
Ryour thighs are slightly supported by the seat
cushion
Ryour legs are not entirely stretched and you
can depress the pedals properly
Rthe back of your head is supported at eye level
by the center of the head restraint
Ryou can hold the steering wheel with your
arms slightly bent
Ryou can move your legs freely
Ryou can see all the displays in the instrument
cluster clearly
Ryou should have a good overview of traffic
conditions
Rthe seat belt is pulled snugly against the body and is routed across the center of your shoul-
der and across your hips in the pelvic area
Further related subjects:
RAdjusting the seats electrically (Ypage 96).
RAdjusting the steering wheel electrically
(Ypage 101).
RFastening the seat belt correctly (Ypage 47).
RAdjusting the rear-view mirror and exterior
mirrors (Ypage 103).
RStoring the seat, steering wheel, exterior mir-
ror and head-up display settings with the
memory function (
Ypage 106).
Seats
Important safety notes
GWARNING
Children could become trapped if they adjust
the seats, particularly when unattended.
There is a risk of injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
The seats can still be adjusted when there is no
SmartKey in the ignition lock.
GWARNING
When you adjust a seat, you or other vehicle
occupants could become trapped, e.g. on the seat guide rail. There is a risk of injury.
Make sure when adjusting a seat that no one
has any body parts in the sweep of the seat.
Observe the safety notes on "Air bags"
(
Ypage 49) and "Children in the Vehicle"
(Ypage 59).
GWARNING
If the head restraints are not installed or not
adjusted correctly, they cannot provide pro-
tection as intended. There is an increased risk
of injury in the head and neck area, e.g. in the event of an accident or when braking.
94Seats
Seats, steering wheel and mirrors

Switching the seat heating on/off
Switching on/off
GWARNING
Repeatedly switching on the seat heating can
cause the seat cushion and backrest pads to
become very hot. The health of persons with
limited temperature sensitivity or a limited
ability to react to high temperatures may be
affected or they may even suffer burn-like
injuries. There is a risk of injury.
Therefore, do not switch the seat heating on
repeatedly.
The three red indicator lamps in the button indi-
cate the heating level you have selected.
The system automatically switches down from
level 3to level 2after approximately eight
minutes.
The system automatically switches down from
level 2to level 1after approximately ten
minutes.
The system automatically switches off approx-
imately 20 minutes after it is set to level 1.
XTurn the SmartKey to position1or2 in the
ignition lock (Ypage 123).
XTo switch on: press button:repeatedly
until the desired heating level is set.
XTo switch off: press button:repeatedly
until all the indicator lamps go out.
iIf the battery voltage is too low, the seat
heating may switch off.
iIf drive program Eis selected, the power of
the seat heating is reduced.
Switching the seat ventilation on/off
Switching on/off
The blue indicator lamps in the button indicate
the ventilation level you have selected.
XTurn the SmartKey to position 1or2 in the
ignition lock (Ypage 123).
XTo switch on: press button:repeatedly
until the desired ventilation level is set.
XTo switch off: press button:repeatedly
until all the indicator lamps go out.
iIf the battery voltage is too low, the seat
ventilation may switch off.
iYou can open the side windows and the soft
top with the SmartKey (Ypage 90). The seat
ventilation of the driver's seat automatically
switches to the highest level.
iWhen the vehicle is stationary, the fan
speed can be reduced automatically. This
reduces the noises of the seat ventilation.
Seats99
Seats, steering wheel and mirrors
Z

Problems with the seat heating / seat ventilation
ProblemPossible causes/consequences andMSolutions
The seat heating or seat
ventilation has switched
off prematurely or can-
not be switched on.The on-board voltage is too low because too many electrical consum-
ers are switched on.
XSwitch off electrical consumers that you do not need, such as the
rear window defroster or interior lighting.
Once the battery is sufficiently charged, the seat heating or seat
ventilation can be switched back on manually.
AIRSCARF
Switching on/off
GWARNING
When AIRSCARF is switched on, very hot air
can flow from the vents in the head restraints. This could result in burns in the immediate
vicinity of the air vents. There is a risk of injury.
Reduce the heater output before it becomes
too hot.
The AIRSCARF function warms the head and
neck area of vehicle occupants with warm air.
The warm air flows out of the holes in the head
restraints.
The three red indicator lamps in the button indi-
cate the heating level you have selected.
XMake sure that the SmartKey is in position 1
or 2 in the ignition lock.
XTo switch on: press button:.
Three red indicator lamps in the button light
up. The blower starts up after a preheating
phase of seven seconds.
XPress button :repeatedly until the desired
heating level is set.
XTo switch off: press button:repeatedly
until all the indicator lamps go out.
Adjust the height of the current of air blown out according to your height while adjusting the
height of the head restraint.
Make sure that there are no objects covering the
intake grille on the back of the driver's seat head
restraint.
iThe blower continues running for seven sec-
onds to cool down the heating elements.
iIf the battery voltage is too low, AIRSCARF
may switch off.
Steering wheel
Important safety notes
GWARNING
You could lose control of your vehicle if you do the following while driving:
Radjust the driver's seat, head restraint,
steering wheel or mirrors
Rfasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt before starting the engine.
GWARNING
Children could injure themselves if they
adjust the steering wheel. There is a risk of
injury.
100Steering wheel
Seats, steering wheel and mirrors

When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
The electrically adjustable steering wheel can
still be adjusted when there is no key in the igni-
tion lock.
Adjusts the steering wheel electri-
cally
:Adjusts the steering wheel height
;Adjusts the steering wheel position (fore-
and-aft adjustment)
iFurther related subjects:
REASY-ENTRY/EXIT feature (Ypage 101)
RStoring settings (Ypage 106)
Steering wheel heating
Switching on/off
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 123).
XTo switch on/off: turn the lever in the direc-
tion of arrow :or;.
Indicator lamp =lights up or goes out.
If you switch off the ignition, the steering wheel
heating is deactivated.
Problems with the steering wheel heating
ProblemPossible causes/consequences and MSolutions
The steering wheel heat-
ing has switched off pre-
maturely or cannot be
switched on.The on-board voltage is too low because too many electrical consum-
ers are switched on.
XSwitch off electrical consumers that you do not need, such as the
rear window defroster or interior lighting.
EASY-ENTRY/EXIT feature
Important safety notes
GWARNING
When the EASY-ENTRY/EXIT feature adjusts
the steering wheel, you and other vehicle
occupants – particularly children – could
become trapped. There is a risk of injury.
While the EASY-ENTRY/EXIT feature is mak-
ing adjustments, make sure that no one has
any body parts in the sweep of the steering
wheel.
Move the steering wheel adjustment lever if
there is a risk of entrapment by the steering
wheel. The adjustment process is stopped.
Steering wheel101
Seats, steering wheel and mirrors
Z

You can stop the adjustment process by press-
ing one of the memory function's position but-
tons. This function is only available on vehicles
with memory function.
GWARNING
If children activate the EASY-ENTRY/EXIT fea-
ture, they can become trapped, particularly
when unattended. There is a risk of injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
GWARNING
If you drive off while the EASY-ENTRY/EXIT
feature is making adjustments, you could lose
control of the vehicle. There is a risk of an
accident.
Always wait until the adjustment process is
complete before driving off.
The EASY-ENTRY/EXIT feature makes getting in
and out of your vehicle easier.
You can activate and deactivate the EASY-
ENTRY/EXIT feature using the multimedia sys-
tem (see the Digital Operator's Manual)
Position of the steering wheel when the
EASY-ENTRY/EXIT feature is active
The steering wheel swings up when you:
Rremove the SmartKey from the ignition lock
Rwith KEYLESS-GO or KEYLESS-GO start
function: open the driver's door; the voltage
supply must be switched on
Rwith the SmartKey: open the driver's door;
the SmartKey must be in position gor1 in
the ignition lock (
Ypage 123)
Ropen the driver's door when the ignition is
switched off
iThe steering wheel only tilts up if the driving
position is stored after the steering column
adjustment has been adjusted (
Ypage 106).
The most recent driving position of the steering
wheel is stored if:
Rthe ignition is switched off
Rthe setting is stored using the memory func-
tion (Ypage 106)
iThe steering wheel only moves up if it has
not already reached the upper steering lim-
iter.
Position of the steering wheel for driv-
ing
The steering wheel is moved to the last selected
position when:
Rthe driver's door is closed and you insert the
SmartKey into the ignition lock
Ryou close the driver's door when the ignition
is switched on
Ryou press the Start/Stop button once in vehi-
cles with KEYLESS-GO or the KEYLESS-GO
start function
iThe steering wheel only returns to the last
set position if the driving position is stored
after the seat or steering column has been
adjusted (
Ypage 106).
The most recent driving position of the steering
wheel is stored if:
Rthe ignition is switched off
Rthe setting is stored using the memory func-
tion (Ypage 106)
Crash-responsive EASY-EXIT feature
If the crash-responsive EASY-EXIT feature is trig-
gered in an accident, the steering column will
move up when the driver's door is opened or the
SmartKey is removed from the ignition lock. This
makes it easier to exit the vehicle and rescue the
occupants.
The crash-responsive EASY-EXIT feature is
operational only if the EASY-EXIT/ENTRY fea-
ture is activated in the multimedia system (see
Digital Operator's Manual).
102Steering wheel
Seats, steering wheel and mirrors

Mirrors
Exterior mirrors
Important safety notes
GWARNING
You could lose control of your vehicle if you do the following while driving:
Radjust the driver's seat, head restraint,
steering wheel or mirrors
Rfasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt before starting the engine.
GWARNING
The exterior mirror on the front-passenger
side reduces the size of the image. Visible
objects are actually closer than they appear.
This means that you could misjudge the dis-
tance from road users traveling behind, e.g.
when changing lane. There is a risk of an acci-
dent.
For this reason, always make sure of the
actual distance from the road users traveling
behind by glancing over your shoulder.
Adjusting the exterior mirrors
XTurn the SmartKey to position 1or2 in the
ignition lock (Ypage 123).
XExterior mirror on the front-passenger side:
press button ;. Exterior mirror on the driver's side: press but-
ton
=.
The indicator lamp lights up in the button that
has been pressed.
The indicator lamp goes out again after some
time. You can adjust the selected exterior
mirror using button :as long as the indicator
lamp is lit.
XPress button :up, down, or to the left or
right until you have adjusted the exterior mir-
ror to the correct position. You should have a
good overview of traffic conditions.
The convex exterior mirrors provide a larger field of vision.
After the engine has been started, the exterior
mirrors are automatically heated if the rear win-
dow defroster is switched on and the outside
temperature is low.
Folding the exterior mirrors in or out
electrically
XTurn the SmartKey to position 1or2 in the
ignition lock (Ypage 123).
XBriefly press :.
Both exterior mirrors fold in or out.
iMake sure that the exterior mirrors are
always folded out fully while driving. They
could otherwise vibrate.
iIf you are driving faster than 30 mph
(47 km/h), you can no longer fold in the exte-
rior mirrors.
Resetting the exterior mirrors
If the battery has been disconnected or com-
pletely discharged, the exterior mirrors must be
reset. The exterior mirrors will otherwise not
fold in if you have activated the Automatic
Mirrors103
Seats, steering wheel and mirrors
Z