stop start MERCEDES-BENZ C-Class COUPE 2012 CL204 Owner's Guide

Using the SmartKeyXTurn the SmartKey to position 0 in the
ignition lock and remove it.
The immobilizer is activated.
i The SmartKey can only be removed if the
transmission is in position P.
Using KEYLESS-GO
XPress the Start/Stop button (Y page 125).
The engine stops and all the indicator
lamps in the instrument cluster go out.
i When the driver's door is closed, this
corresponds to SmartKey position 1. When
the driver's door is open, it corresponds to
SmartKey position 0 or "SmartKey
removed".
If you attempt to switch off the engine while
the selector lever is in a position other than
P , a message appears in the multifunction
display and you hear a tone.
Parking brake
GWARNING
Engaging the parking brake while the vehicle
is in motion can cause the rear wheels to lock
up. You could lose control of the vehicle and
cause an accident. In addition, the vehicle's
brake lights do not light up when the parking
brake is engaged.
GWARNING
When leaving the vehicle, always remove the
SmartKey from the starter switch, take it with
you, and lock the vehicle. Do not leave
children unattended in the vehicle, or with
access to an unlocked vehicle. Children could
release the parking brake and/or shift the
automatic transmission out of park position
P , either of which could result in an accident
and/or serious personal injury.
XTo apply: depress parking brake ; firmly.
When the engine is running, the $ (USA
only) or J (Canada only) indicator lamp
lights up in the instrument cluster.XTo release: depress the brake pedal and
keep it depressed.XPull release handle :.
When the ignition is switched on or the
engine is running, the $ (USA only) or
J (Canada only) indicator lamp goes out
in the instrument cluster.
Parking the vehicle for a long period
If you leave the vehicle parked for longer than
four weeks, the battery may be damaged by
exhaustive discharge.
XConnect a trickle charger.
i You can obtain information about trickle
chargers from a qualified specialist
workshop, e.g. an authorized Mercedes-
Benz Center.
If you leave the vehicle parked for longer than
six weeks, the vehicle may suffer damage as
a result of lack of use.
XVisit a qualified specialist workshop and
seek advice.Parking141Driving and parkingZ

Limited braking performance on salt-
treated roadsGWARNING
The layer of salt on the brake discs and the
brake pads/linings may cause a delay in the
braking effect, resulting in a significantly
longer braking distance, which could lead to
an accident.
To avoid this danger, you should:
R occasionally brake carefully, without
putting other road users at risk, when you
are driving on salted roads. This helps to
remove any salt that may have started to
build up on the brake discs and the brake
pads/linings.
R maintain a greater distance to the vehicle
ahead and drive with particular care.
R carefully apply the brakes at the end of a
trip and immediately after commencing a
new trip, so that salt residues are removed
from the brake discs.
Servicing the brakes
! If the red brake warning lamp lights up in
the instrument cluster and you hear a
warning tone while the engine is running,
the brake fluid level may be too low.
Observe additional warning messages in
the multifunction display.
The brake fluid level may be too low due to
brake pad wear or leaking brake lines.
Have the brake system checked
immediately. This work should be carried
out at an authorized Mercedes-Benz
Center.
All checks and maintenance work on the
brake system must be carried out at a
qualified specialist workshop. This work
should be carried out at an authorized
Mercedes-Benz Center.
Have the brake pads replaced and the brake
fluid renewed at a qualified specialist
workshop, e.g. an authorized Mercedes-Benz
Center.
GWARNING
If brake pads or brake fluid other than those
recommended are used, the braking
properties of the vehicle can be degraded to
an extent that safe braking is substantially
impaired. This could result in an accident.
! A function or performance test should
only be carried out on a 2-axle
dynamometer. If you are planning to have
the vehicle tested on such a dynamometer,
contact an authorized Mercedes-Benz
Center to obtain further information first.
Otherwise, you could damage the drive
train or the brake system.
! As the ESP ®
system operates
automatically, the engine and the ignition
must be switched off (SmartKey in position
0 or 1 in the ignition lock or Start/Stop
button in position 0 or 1) while the parking
brake is being tested on a brake
dynamometer (maximum 10 seconds).
Braking maneuvers triggered automatically
by ESP ®
may seriously damage the brake
system.
! As the ESP ®
system operates
automatically, the engine and the ignition
system must be switched off (SmartKey in
position 0 or 1 in the ignition lock or Start/
Stop button in position 0 or 1) when:
R testing the parking brake on a brake
dynamometer.
R you intend to have the vehicle towed with
the front axle raised.
Braking maneuvers triggered automatically
by ESP ®
may seriously damage the brake
system.
If your brake system is subject only to
moderate loads, you should test the
functionality of your brakes at regular
intervals by pressing firmly on the brake pedal
at high speeds. This improves the grip of the
brake pads.
144Driving tipsDriving and parking

Vehicles with COMAND
i The following function is not operational
in all countries.
DISTRONIC PLUS uses additional information
from your navigation system so that it can
react appropriately to certain traffic
situations. This is the case if, while following
a vehicle, DISTRONIC PLUS is active and you:
R approach or drive through a traffic circle
R approach a T intersection
R turn off at a freeway exit
Even if the vehicle in front leaves the
detection range, DISTRONIC PLUS
temporarily maintains the current driving
speed and does not accelerate. This is based
on the current map data in the navigation
system.
Example: traffic circle
The current speed is maintained:
R approximately 10 seconds before the
traffic circle/T intersection and for
approximately 1.5 seconds when driving on
the traffic circle
R approximately 12 seconds before reaching
a freeway exit and approximately
4 seconds after the freeway exit
Afterwards, the vehicle accelerates back to
the set speed you specified.
Stopping
GWARNING
Never get out of the vehicle when DISTRONIC
PLUS is activated.
DISTRONIC PLUS must also never be
operated, activated or deactivated by a
passenger or from outside the vehicle.
DISTRONIC PLUS does not replace the
parking brake and must not be used for
parking.
The DISTRONIC PLUS braking effect is
canceled and the vehicle can start moving if:
R DISTRONIC PLUS is deactivated using the
cruise control lever.
R you accelerate.
R there is a malfunction in the system or an
interruption in the power supply, e.g.
battery failure.
R the electrical system in the engine
compartment, the battery or the fuses are
tampered with.
R the battery is disconnected.
If you wish to leave the vehicle or park it,
deactivate DISTRONIC PLUS and secure the
vehicle against rolling away.
If DISTRONIC PLUS detects that the vehicle
in front is stopping, it brakes your vehicle until
it is stationary.
Once your vehicle is stationary, it remains
stationary and you do not need to depress the
brake.
i Depending on the specified minimum
distance, your vehicle will come to a
standstill at a sufficient distance behind the
vehicle in front. The specified minimum
distance is set using the control on the
cruise control lever.
You will see a warning message in the
multifunction display if DISTRONIC PLUS is
activated and:
R the driver's door is open and the driver's
seat belt is unfastened.
R the engine is switched off.
R the hood is opened.
Shift to 'P'Driving systems153Driving and parkingZ

iIf the engine has been switched off, it
cannot be started again until the HOLD
function has been deactivated.
If there is a malfunction in the system or
power supply while the HOLD function is
activated, the Brake immediately message
is shown in the multifunction display.
Immediately depress the brake firmly until
the warning message in the multifunction
display goes out.
You can also shift the transmission to position
P . This deactivates the HOLD function.
RACE START
Important safety notes
i RACE START is only available in AMG
vehicles.
RACE START enables optimal acceleration
from a standing start. The precondition for
this is a suitable high-grip road surface.
GWARNING
RACE START is only available when SPORT
handling mode is activated. SPORT handling
mode only stabilizes the vehicle to a limited
extent in the event of swerving or wheelspin.
RACE START should only be used on specially
designated roads. Always adapt your speed
and driving style to the prevailing road and
weather conditions.
Conditions for activation
RACE START can be activated when:
R the doors are closed.
R the engine is running and it has reached an
operating temperature of approximately
176 ‡ (80 †). This is the case when the
engine oil temperature in the multifunction
display stops flashing.
R SPORT handling mode is activated.
( Y page 60)
R the steering wheel is in the straight-ahead
position.
R the vehicle is stationary and the brake
pedal is depressed (left foot).
R the transmission is in position D.
Activating RACE STARTXDepress the brake pedal with your left foot,
and keep it depressed.XTurn the drive program selector clockwise
( Y page 132) until the RS lamp lights up.
The multifunction display shows the RACE
START Confirm: Paddle UP Cancel:
Paddle DOWN message.
i
If the conditions for activation are no
longer fulfilled, RACE START is canceled.
The multifunction display shows the RACE
START canceled message.
XTo cancel: pull the left steering wheel shift
paddle ( Y page 133).
or
XTo confirm: pull the right steering wheel
shift paddle ( Y page 133).
The multifunction display shows the RACE
START available Depress
accelerator message.
i
If you do not depress the accelerator
pedal fully within two seconds, RACE
START is canceled. The multifunction
display shows the RACE START not
possible See Operator's Manual
message.
XDepress the accelerator pedal fully.
The engine speed increases to
approximately 4000 rpm.
The multifunction display shows the RACE
START Release brake to start
message.
i If you do not release the brake pedal
within seven seconds, RACE START is
canceled. The multifunction display shows
the RACE START canceled message.
XTake your foot off the brake, but keep the
accelerator pedal depressed.
The vehicle pulls away at maximum
acceleration.Driving systems161Driving and parkingZ

Left control panel=
;R Calls up the menu and menu bar9
:Press briefly:
R Scrolls through lists
R Selects a submenu or function
R In the Audio menu: selects a
stored station, an audio track or
a video scene
R In the Tel (telephone) menu:
switches to the phone book and
selects a name or telephone
number9
:Press and hold:
R In the Audio menu: selects the
previous/next station or selects
an audio track or a video scene
using rapid scrolling
R In the Tel (telephone) menu:
starts rapid scrolling through the
phone bookaR Confirms a selection/display
message
R In the Tel (telephone) menu:
switches to the telephone book
and starts dialing the selected
number
R In the Audio menu: stops the
station search function at the
desired station
Right control panel
~R Rejects or ends a call
R Exits phone book/redial
memory6R Makes or accepts a call
R Switches to the redial memoryW
XR Adjusts the volume8RMute
Back button
%Press briefly:
R Back
R Switches off the Voice Control
System
R Hides display messages or calls
up the last Trip menu function
used
R Exits the telephone book/redial
memory%Press and hold:
R Calls up the standard display in
the Trip menu
Multifunction display
Values and settings as well as display
messages are shown in the multifunction
display.
:Description field;Menu bar=Drive program?Outside temperature or speed
( Y page 194)ATransmission position184Displays and operationOn-board computer and displays

You will see one of the following display
messages in the multifunction display:
R Telephone Ready or the name of the
network provider: the mobile phone has
found a network and is ready to receive.
R Telephone No Service : no network is
available, or the mobile phone is searching
for a network.
Accepting a call
If someone calls you when you are in the Tel
menu, a display message appears in the
multifunction display, for example:
XPress the 6 button on the steering
wheel to accept an incoming call.
If you are not in the Tel menu, you can still
accept a call.
Rejecting or ending a call
XPress the ~ button on the steering
wheel.
If you are not in the Tel menu, you can still
reject or end a call.
Dialing a number from the phone book
If your mobile phone is able to receive calls,
you can search for and dial a number from the
phone book in the audio system or COMAND
at any time.
XPress the = or ; button on the
steering wheel to select the Tel menu.XPress the 9, : or a button to call
up the phone book.XPress the 9 or : button to select the
desired name.
To start scrolling rapidly, press and hold the
9 or : button for longer than one
second. After a short time, the rapid scroll
speeds up.
Rapid scrolling stops when you release the
button or reach the end of the list.XIf only one telephone number is stored
for a name: press the 6 or a button
to start dialing.
or
XIf there is more than one number for a
particular name: press the 6 or a
button to display the numbers.XPress the 9 or : button to select the
number you want to dial.XPress the 6 or a button to start
dialing.
or
XIf you do not want to make a call: press
the ~ or % button.
Redialing
The on-board computer saves the last names
or numbers dialed in the redial memory.
XPress the = or ; button on the
steering wheel to select the Tel menu.XPress the 6 button to switch to the
redial memory.XPress the 9 or : button to select the
desired name or number.XPress the 6 or a button to start
dialing.
or
XIf you do not want to make a call: press
the ~ or % button.Menus and submenus191On-board computer and displaysZ

XPress = or ; on the steering wheel
to select the AMG menu.XPress the 9 button repeatedly until the
RACETIMER is shown.
i If RACETIMER is selected, the menu bar
cannot be called up with the =
and ; buttons.
:Lap;RACETIMER
You can start the RACETIMER when the
engine is running or if the SmartKey is in
position 2 in the ignition lock.
XTo start: press the a button to start the
RACETIMER.
Displaying the intermediate time
XPress = or ; to select Interm.
Time .XPress the a button to confirm.
The intermediate time is displayed for five
seconds.
Starting a new lap
It is possible to store a maximum of sixteen
laps.
XPress a to confirm New Lap.:RACETIMER;Fastest lap time (best lap)=Lap
Stopping the RACETIMER
XPress the % button on the steering
wheel.XPress a to confirm YES.
The RACETIMER interrupts timing when you
stop the vehicle and turn the SmartKey to
position 1 in the ignition lock. When you turn
the SmartKey to position 2 or 3 and then
press the a to confirm Start, timing is
continued.
Resetting the current lap
XStop the RACETIMER.XPress = or ; to select Reset Lap .XPress a to reset the lap time to "0”.
Deleting all laps
If you switch off the engine, the RACETIMER
is reset to "0" after 30 seconds. All laps are
deleted.
You cannot delete individual stored laps. If
you have stopped 16 laps, the current lap
does not have to be reset.
XReset the current lap.XPress a to confirm Reset.
Reset Race Timer? appears in the
multifunction display.Menus and submenus199On-board computer and displaysZ

Display messagesPossible causes/consequences and M Solutions$ (USA
only) J (Canada
only)
Brake ImmediatelyA malfunction has occurred while the HOLD function or
DISTRONIC PLUS is active.
A tone may also sound at regular intervals. The tone becomes
louder if you attempt to lock the vehicle.
You cannot start the engine.XPaying attention to the traffic situation, immediately depress the
brake pedal firmly and hold until the display message
disappears.XPrevent the vehicle from rolling away before you leave it
( Y page 280).
You can restart the engine.$ (USA
only) J (Canada
only)
Check Brake Fluid
LevelGRisk of accident
There is not enough brake fluid in the brake fluid reservoir.
Additionally, the red $ (USA only)/ J (Canada only)
warning lamp lights up in the instrument cluster and a warning
tone sounds.
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.XEngage the parking brake.XConsult a qualified specialist workshop.XDo not add brake fluid. This will not rectify the malfunction.GWARNING
Driving with the message Check Brake Fluid Level displayed can result in an accident. Have
your brake system checked immediately.
Do not add brake fluid before checking the brake system. Overfilling the brake fluid reservoir can
result in spilling brake fluid on hot engine parts and the brake fluid catching fire. You can be
seriously burned.
Display messages205On-board computer and displaysZ

Display messagesPossible causes/consequences and M Solutions?
Coolant Level Low
Stop Vehicle Turn
Engine OffThe coolant is too hot.XPull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.XMake sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.XWait until the display message disappears before restarting the
engine. Otherwise, there is a risk of engine damage.XPay attention to the coolant temperature display.XIf the temperature increases again, visit a qualified specialist
workshop immediately.GWARNING
Driving when your engine is overheated can cause some fluids which may have leaked into the
engine compartment to catch fire. You could be seriously burned.
Steam from an overheated engine can cause serious burns which can occur just by opening the
engine hood. Stay away from the engine if you see or hear steam coming from it.
Stop the vehicle in a safe location away from other traffic. Turn off the engine, get out of the
vehicle and do not stand near the vehicle until the engine has cooled down.
! If the coolant temperature exceeds 248 ‡(120 †) do not continue driving. The engine will
otherwise be damaged.
214Display messagesOn-board computer and displays

Display messagesPossible causes/consequences and M Solutions Blind Spot Assist
Currently
Unavailable See
Operator's
Manual or Active
Blind Spot Assist
Currently
Unavailable See
Operator's ManualBlind Spot Assist or Active Blind Spot Assist is temporarily
inoperative. Possible causes are:
R the sensors are dirty.
R function is impaired due to heavy rain or snow.
R the radar sensor system is outside the operating temperature
range.
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio
stations or other sources of electromagnetic radiation.
The yellow 9 indicator lamps also light up in the exterior
mirrors.
If the display message does not disappear:XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XApply the parking brake.XClean the sensors ( Y page 273).XRestart the engine.
If the system detects that the sensors are fully operational, the
display message disappears.
Blind Spot Assist or Active Blind Spot Assist is operational again.
Blind Spot Assist
Inoperative
or Active Blind
Spot Assist
InoperativeBlind Spot Assist or Active Blind Spot Assist is defective.
The yellow 9 indicator lamps also light up in the exterior
mirrors.XVisit a qualified specialist workshop.Parking Guidance
InoperativeParking Guidance is malfunctioning ( Y page 165).XRestart the engine.
If the display message continues to be displayed:
XVisit a qualified specialist workshop.218Display messagesOn-board computer and displays