2015 MERCEDES-BENZ SLK-Class engine

TRONIC PLUS brakes automatically so that
the set speed is not exceeded.
On long and steep downhill gradients, espe-
cially if the vehicle is laden, you must select a lower gear in good time. By doing so, you will make use of the braking effect of the engine.
This relieves the load on the brake system and
prevents the brakes from overheating and
wearing too quickly.
If a slower-moving vehicle is detected in front, DISTRONIC PLUS brakes your vehicle. It
maintains the preset distance to the vehicle infront.
If DISTRONIC PLUS detects that there is a risk
of a collision, you will be warned visually and acoustically. DISTRONIC PLUS cannot pre-
vent a collision without your intervention. An
intermittent warning tone will then sound and
the distance warning lamp will light up in the instrument cluster. Brake immediately in
order to increase the distance to the vehicle
in front or take evasive action provided it is
safe to do so.
For DISTRONIC PLUS to assist you, the radar
sensor system must be operational.
If there is no vehicle in front, DISTRONIC
PLUS operates in the same way as cruise
control in the speed range between 20 mph
(Canada: 30 km/h) and 120 mph (Canada:
200 km/h). If a vehicle is driving in front of
you, it operates in the speed range between
0 mph (0 km/h) and 120 mph (Canada:
200 km/h).
Do not use DISTRONIC PLUS while driving on roads with steep gradients.
As DISTRONIC PLUS transmits radar waves, it
can resemble the radar detectors of the
responsible authorities. You can refer to the
relevant chapter in the Operator's Manual if
questions are asked about this.
i USA only: This device has been approved
by the FCC as a "Vehicular Radar System". The radar sensor is intended for use in an
automotive radar system only. Removal,
tampering, or altering of the device will void
any warranties, and is not permitted by the FCC. Do not tamper with, alter, or use in
any non-approved way.
Any unauthorized modification to this
device could void the user's authority to
operate the equipment.
i Canada only: This device complies with
RSS-210 of Industry Canada. Operation is
subject to the following two conditions:
1. This device may not cause harmful inter- ference, and
2. this device must accept any interference
received, including interference that may
cause undesired operation of the device.
Removal, tampering, or altering of the
device will void any warranties, and is not
permitted. Do not tamper with, alter, or use in any non-approved way.
Any unauthorized modification to this
device could void the user's authority to
operate the equipment.
Important safety notes G
WARNING
DISTRONIC PLUS does not react to:
R people or animals
R stationary obstacles on the road, e.g. stop-
ped or parked vehicles
R oncoming and crossing traffic
As a result, DISTRONIC PLUS may neither give
warnings nor intervene in such situations.
There is a risk of an accident.
Always pay careful attention to the traffic sit- uation and be ready to brake. G
WARNING
DISTRONIC PLUS cannot always clearly iden- tify other road users and complex traffic sit-
uations.
In such cases, DISTRONIC PLUS may:
R give an unnecessary warning and then
brake the vehicle
R neither give a warning nor intervene
R accelerate unexpectedly 172
Driving systemsDriving and parking

0085
To store the current speed or a lower
speed
0083 To deactivate DISTRONIC PLUS
Activating DISTRONIC PLUS; storing,
maintaining and calling up a speed Important safety notes
! If DISTRONIC PLUS or the HOLD function
is activated, the vehicle brakes automati-
cally in certain situations. To prevent dam-
age to the vehicle, deactivate DISTRONIC
PLUS and the HOLD function in the follow-
ing or other similar situations:
R when towing the vehicle
R in the car wash
In order to activate DISTRONIC PLUS, the fol- lowing conditions must be fulfilled:
R the engine must be started. It may take up
to two minutes after pulling away before
DISTRONIC PLUS is operational.
R your vehicle must not be secured by the
electric parking brake.
R ESP ®
must be activated.
R the transmission must be in position D.
R the hood must be closed.
R the driver's door must be closed when you
shift from Pto Dor your seat belt must be
fastened.
R the front-passenger door must be closed.
R the vehicle must not skid.
Activating
X Briefly pull the cruise control lever towards
you 0087, or press it up 0043or down 0085.
DISTRONIC PLUS is selected.
X To adjust the set speed in 1 mph incre-
ments (1 km/h increments): briefly
press the cruise control lever up 0043to the pressure point for a higher speed or
down
0085for a lower speed.
Every time the cruise control lever is
pressed up or down, the last speed stored
is increased or reduced.
or X To adjust the set speed in 5 mph incre-
ments (10 km/h increments): briefly
press the cruise control lever up 0043past
the pressure point for a higher speed or
down 0085for a lower speed.
Every time the cruise control lever is
pressed up or down, the last speed stored
is increased or reduced.
X Remove your foot from the accelerator
pedal.
Your vehicle adapts its speed to that of the
vehicle in front, but only up to the desired
stored speed.
When driving at speeds below 20 mph
(30 km/h) , you can only activate DISTRONIC
PLUS if the vehicle in front has been detected
and is shown in the multifunction display. If
the vehicle in front is no longer detected and
displayed, for example because it has
changed lanes, DISTRONIC PLUS is deactiva-
ted. You will hear a warning tone if this is the
case.
i If you do not fully release the accelerator
pedal, the DISTRONIC PLUS Inactive
DISTRONIC PLUS Inactive
message appears in the multifunction dis-
play. The set distance to a slower-moving
vehicle in front will then not be maintained.
You will be driving at the speed you deter-
mine by the position of the accelerator
pedal.
Pulling away and driving
If you depress the brake, DISTRONIC PLUS is deactivated unless your vehicle is stationary. 174
Driving systemsDriving and parking

X
If the vehicle in front pulls away: remove
your foot from the brake pedal.
X Briefly pull the cruise control lever towards
you 0087.
or
X Accelerate briefly.
Your vehicle pulls away and adapts its
speed to that of the vehicle in front.
If there is no vehicle in front, DISTRONIC
PLUS operates in the same way as cruise
control.
If DISTRONIC PLUS detects that the vehicle in front has slowed down, it brakes your vehicle.
It maintains the preset distance to the vehicle
in front.
If DISTRONIC PLUS detects that there is a risk of a collision, you will be warned visually and
acoustically. DISTRONIC PLUS cannot pre-
vent a collision without your intervention. An
intermittent warning tone will then sound and the distance warning lamp will light up in theinstrument cluster. Brake immediately in
order to increase the distance from the vehi-
cle in front, or take evasive action, provided it
is safe to do so.
If DISTRONIC PLUS detects a faster-moving
vehicle in front, it increases the driving speed.
However, the vehicle is only accelerated up to the speed you have stored.
Changing lanes
If you wish to change to the passing lane (in
countries where traffic drives on the right, the passing lane is the left-hand lane), DIS-
TRONIC PLUS supports you if:
R you are driving faster than 40 mph
(60 km/ h)
R DISTRONIC PLUS is maintaining the dis-
tance to a vehicle in front
R you have switched on the corresponding
turn signal
R DISTRONIC PLUS does not detect a danger
of collision
If these conditions are fulfilled, your vehicle is
accelerated. Acceleration will be interrupted if changing lanes takes too long or if the dis-
tance between your vehicle and the vehicle in
front becomes too small.
Stopping G
WARNING
When leaving the vehicle, even if it is braked
only by DISTRONIC PLUS, it could roll away if:
R there is a malfunction in the system or in
the voltage supply.
R DISTRONIC PLUS has been deactivated
with the cruise control lever, e.g. by a vehi-
cle occupant or from outside the vehicle.
R the electrical system in the engine com-
partment, the battery or the fuses have
been tampered with.
R the battery is disconnected.
R the accelerator pedal has been depressed,
e.g. by a vehicle occupant.
There is a risk of an accident.
If you wish to exit the vehicle, always turn off
DISTRONIC PLUS and secure the vehicle
against rolling away.
Deactivating DISTRONIC PLUS (Y page 178).
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. After a time, the electric parking brake
secures the vehicle and relieves the service
brake.
Depending on the specified minimum dis-
tance, 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. Driving systems
175Driving and parking Z

The electric parking brake automatically
secures the vehicle 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, unless it is auto-
matically switched off by the ECO start/
stop function.
R the hood is opened.
R a system malfunction occurs.
R the power supply is not sufficient.
If there is a malfunction in the vehicle elec-
tronics, a warning message may also appear
in the multifunction display.
Brake Immediately
Brake Immediately
X Immediately depress the brake firmly until
the warning message in the multifunction
display goes out. DISTRONIC PLUS is deac- tivated.
Shift to 'P'
Shift to 'P'
X
Shift the transmission to position Pto pre-
vent the vehicle from rolling away.
DISTRONIC PLUS is deactivated. The warn-
ing message in the multifunction display
disappears.
The horn will also sound at regular intervals if DISTRONIC PLUS is activated and you:
R switch the engine off, open the driver's
door and remove your seat belt.
R open the hood.
The sounding of the horn alerts you to the fact
that the vehicle has been parked while DIS-
TRONIC PLUS is still activated. The sound
becomes louder if you attempt to lock the
vehicle. The vehicle is not locked until DIS-
TRONIC PLUS is deactivated.
i If the engine has been switched off, it
cannot be started again until DISTRONIC
PLUS has been deactivated. Storing the current speed or calling up the
last stored speed G
WARNING
If you call up the stored speed and it differs
from the current speed, the vehicle acceler-
ates or decelerates. If you do not know the
stored speed, the vehicle could accelerate or brake unexpectedly. There is a risk of an acci-
dent.
Pay attention to the road and traffic condi-
tions before calling up the stored speed. If you do not know the stored speed, store the
desired speed again.
X Briefly pull the cruise control lever towards
you 0087.
X Remove your foot from the accelerator
pedal.
DISTRONIC PLUS is activated. The first
time it is activated, the current speed is
stored. Otherwise, it sets the vehicle cruise
speed to the previously stored value.
Setting a speed Keep in mind that it may take a brief moment
until the vehicle has accelerated or braked to the speed set.
X To adjust the set speed in 1 mph incre-
ments (1 km/h increments): briefly
press the cruise control lever up 0043to the
pressure point for a higher speed or
down 0085for a lower speed.
Every time the cruise control lever is
pressed up or down, the last speed stored
is increased or reduced.
X To adjust the set speed in 5 mph incre-
ments (10 km/h increments): briefly
press the cruise control lever up 0043past
the pressure point for a higher speed or
down 0085for a lower speed.
Every time the cruise control lever is
pressed up or down, the last speed stored
is increased or reduced. 176
Driving systemsDriving and parking

X
Select the Assistance Graphic
Assistance Graphic function
using the on-board computer
(Y page 203).
In the Assistance menu of the on-board com- puter, you can also activate or deactivate
PRE-SAFE ®
Brake (Y page 203).
Display when DISTRONIC PLUS is activa-
ted 0043
Vehicle in front, if detected
0044 Specified minimum distance to the vehi-
cle in front; adjustable
0087 Own vehicle
0085 DISTRONIC PLUS activated
X Select the Assistance Graphic Assistance Graphic function
using the on-board computer
(Y page 203).
You will initially see the stored speed for
about five seconds when you activate DIS-
TRONIC PLUS.
Deactivating DISTRONIC PLUS G
WARNING
DISTRONIC PLUS is deactivated and releases the brakes if the vehicle is slowed down to a
speed below 20 mph (30km/h) by the system,
provided that DISTRONIC PLUS does not
detect a vehicle directly in front. At this point,
the driver must apply the brakes in order to
slow down further and bring the vehicle to a
standstill. Cruise control lever
There are several ways to deactivate DIS-
TRONIC PLUS:
X Briefly press the cruise control lever for-
wards 0043.
or X Brake, unless the vehicle is stationary.
When you deactivate DISTRONIC PLUS, you
will see the DISTRONIC
DISTRONIC PLUS PLUSOff
Offmessage in
the multifunction display for approximately
five seconds.
i The last speed stored remains stored until
you switch off the engine.
i DISTRONIC PLUS is not deactivated if you
depress the accelerator pedal. If you accel- erate to overtake, DISTRONIC PLUS
adjusts the vehicle's speed to the last
speed stored after you have finished over-
taking.
DISTRONIC PLUS is automatically deactiva-
ted if: R you engage the electric parking brake or if
the vehicle is automatically secured with
the electric parking brake
R you are driving slower than 15 mph
(25 km/h) and there is no vehicle in front,
or if the vehicle in front is no longer detec-
ted
R ESP ®
intervenes or you deactivate ESP ®
R the transmission is in the P,Ror Nposition 178
Driving systemsDriving and parking

HOLD function
General notes The HOLD function can assist the driver in the
following situations:
R when pulling away, especially on steep
slopes
R when maneuvering on steep slopes
R when waiting in traffic
The vehicle is kept stationary without the
driver having to depress the brake pedal.
The braking effect is canceled and the HOLD
function deactivated when you depress the
accelerator pedal to pull away.
Important safety notes G
WARNING
When leaving the vehicle, it can still roll away despite being braked by the HOLD function if:
R there is a malfunction in the system or in
the voltage supply.
R the HOLD function has been deactivated by
pressing the accelerator pedal or the brake
pedal, e.g. by a vehicle occupant.
R the electrical system in the engine com-
partment, the battery or the fuses have
been tampered with.
R the battery is disconnected
There is a risk of an accident.
If you wish to exit the vehicle, always turn off the HOLD function and secure the vehicle
against rolling away.
! If DISTRONIC PLUS or the HOLD function
is activated, the vehicle brakes automati-
cally in certain situations. To prevent dam-
age to the vehicle, deactivate DISTRONIC
PLUS and the HOLD function in the follow-
ing or other similar situations:
R when towing the vehicle
R in the car wash
Deactivating the HOLD function
(Y page 181). Activation conditions You can activate the HOLD function if:
R
the vehicle is stationary
R the engine is running or if it has been auto-
matically switched off by the ECO start/
stop function
R the driver's door is closed or your seat belt
is fastened
R the hood is closed
R the electric parking brake is released
R the selector lever is in position D,Ror Non
vehicles with automatic transmission
R DISTRONIC PLUS is deactivated
Activating the HOLD function X
Make sure that the activation conditions
are met.
X Depress the brake pedal.
X Quickly depress the brake pedal further
until 0043HOLD HOLD appears in the multifunction
display.
The HOLD function is activated. You can
release the brake pedal.
i If depressing the brake pedal the first
time does not activate the HOLD function,
wait briefly and then try again.
Deactivating the HOLD function The HOLD function is deactivated automati-
cally if:
R you accelerate. On vehicles with automatic
transmission: only when the transmission
is in position Dor R.
R you shift the transmission to position Pon
vehicles with automatic transmission. Driving systems
181Driving and parking Z

R
you apply the brakes again with a certain
amount of pressure until HOLD
HOLD disappears
from the multifunction display.
R you secure the vehicle using the electric
parking brake.
R you activate DISTRONIC PLUS.
i After a time, the electric parking brake
secures the vehicle and relieves the service
brake.
The electric parking brake automatically
secures the vehicle if the HOLD function is
activated and:
R the driver's door is open and the driver's
seat belt is unfastened.
R the engine is switched off, unless it is auto-
matically switched off by the ECO start/
stop function.
R the hood is opened.
R a system malfunction occurs.
R the power supply is not sufficient.
If there is a malfunction in the vehicle elec-
tronics, a warning message may also appear
in the multifunction display.
Brake Immediately
Brake Immediately
X Immediately depress the brake firmly until
the warning message in the multifunction
display goes out.
The HOLD function is deactivated.
In vehicles with automatic transmission: Shift to 'P'
Shift to 'P' .
X Shift the transmission to position Pto pre-
vent the vehicle from rolling away.
The HOLD function is deactivated. The
warning message in the multifunction dis-
play disappears.
The horn will also sound at regular intervals if the HOLD function is activated and you:
R switch the engine off, open the driver's
door and remove your seat belt.
R open the hood.
The sounding of the horn alerts you to the fact
that the vehicle has been parked while the
HOLD function is still activated. If you attempt to lock the vehicle, the tone becomes louder.
The vehicle is not locked until the HOLD func- tion is deactivated.
i If the engine has been switched off, it
cannot be started again until the HOLD
function has been deactivated. PARKTRONIC
Important safety notes PARKTRONIC is an electronic parking aid with
ultrasonic sensors. It indicates visually and
audibly the distance between your vehicle
and an object.
PARKTRONIC is only an aid. It is not a replace-
ment for your attention to your immediate
surroundings. You are always responsible for
safe maneuvering, parking and exiting a park-
ing space. When maneuvering, parking or
pulling out of a parking space, make sure that there are no persons, animals or objects in
the area in which you are maneuvering.
! When parking, pay particular attention to
objects above or below the sensors, such
as flower pots or trailer drawbars. PARK-
TRONIC does not detect such objects when they are in the immediate vicinity of the
vehicle. You could damage the vehicle or
the objects.
The sensors may not detect snow and other
objects that absorb ultrasonic waves.
Ultrasonic sources such as an automatic
car wash, the compressed-air brakes on a
truck or a pneumatic drill could cause
PARKTRONIC to malfunction.
PARKTRONIC may not function correctly on uneven terrain.
PARKTRONIC is activated automatically when you:
R switch on the ignition
R move the selector lever to position D,Ror
N on vehicles with automatic transmission
R release the electric parking brake. 182
Driving syste
msDriving and parking

Warning displays
Warning display for the front area
0043 Segments on the left-hand side of the
vehicle
0044 Segments on the right-hand side of the
vehicle
0087 Segments showing operational readiness
The warning displays show the distance
between the sensors and the obstacle. The
warning display for the front area is located
on the dashboard above the center air vents.
The warning display for the rear area is loca-
ted between the roll bars.
The warning display for each side of the vehi-
cle is divided into five yellow and two red seg- ments. PARKTRONIC is operational if yellow
segments showing operational readiness 0087
light up.
The selector lever position or selected auto-
matic transmission position and the direction
in which the vehicle is rolling determine which warning display is active when the engine is
running.
Manual transmission: Gear lever posi-
tion Warning display
Forwards gear
or
Neutral
Front area activated
Reverse gear
or
the vehicle is rolling backwards Rear and front areas
activated Automatic transmission:
Transmission
position Warning display
D
Front area activated
R,
Nor the vehicle
is rolling back-
wards Rear and front areas
activated
P
No areas activated
One or more segments light up as the vehicle
approaches an obstacle, depending on the
vehicle's distance from the obstacle.
From the:
R sixth segment onwards, you will hear an
intermittent warning tone for approx-
imately two seconds.
R seventh segment onwards, you will hear a
warning tone for approximately two sec-
onds. This indicates that you have now
reached the minimum distance.
Deactivating/activating PARKTRONIC 0043
Indicator lamp
0044 Deactivates/activates PARKTRONIC
If indicator lamp 0043is on then PARKTRONIC is
deactivated. Parking Guidance is also deacti- vated.
i PARKTRONIC is automatically activated
when you turn the SmartKey to position 2in
the ignition lock. 184
Driving systemsDriving and parking