start stop button MERCEDES-BENZ GL-Class 2014 X166 Owner's Guide

To ensure that the vehicle is secured against
rolling away unintentionally:
R the electric parking brake must be applied.
R the transmission must be in position Pand
the SmartKey must be removed from the
ignition lock.
R the front wheels must be turned towards
the curb on steep uphill or downhill
gradients.
R the empty vehicle must be secured at the
front axle with a wheel chock or similar, for
example, on uphill or downhill gradients.
R a laden vehicle must also be secured at the
rear axle with a wheel chock or similar, for
example, on uphill or downhill gradients. Switching off the engine
Important safety notes G
WARNING
The automatic transmission switches to
neutral position Nwhen you switch off the
engine. The vehicle may roll away. There is a
risk of an accident.
After switching off the engine, always switch
to parking position P. Prevent the parked
vehicle from rolling away by applying the
parking brake.
Using the SmartKey X
Apply the electric parking brake.
X Shift the transmission to position P.
X Turn the SmartKey to position 0in the
ignition lock and remove it.
The immobilizer is activated.
i If you turn off the engine with the
SmartKey and then remove it from the
ignition lock or open a front door, the
automatic transmission shifts to P
automatically.
If you shift the automatic transmission to
N before switching off the engine, the automatic transmission remains in
Neven
if a door is opened.
Using KEYLESS-GO X
Apply the electric parking brake.
X Shift the transmission to position P.
X Press the Start/Stop button (Y page 167).
The engine stops and all the indicator
lamps in the instrument cluster go out.
i If you turn off the engine with the Start/
Stop button, the automatic transmission
shifts to N. If you then open one of the front
doors, the automatic transmission shifts to
P.
i In the event of an emergency, the engine
can be turned off while the vehicle is in
motion by pressing and holding the Start/
Stop button for three seconds. Electric parking brake
General notes G
WARNING
If you leave children unsupervised in the
vehicle, they could set it in motion by, for
example:
R release the parking brake.
R shift the automatic transmission out of the
parking position P.
R start the engine.
In addition, they may operate vehicle
equipment and become trapped. There is a
risk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle. Parking
189Driving and parking Z

The function of the electric parking brake is
dependent on the on-board voltage. If the on-
board voltage is low or there is a malfunction
in the system, it may not be possible to apply
the released parking brake.
X If this is the case, only park the vehicle on
level ground and secure it to prevent it
rolling away.
X Shift the automatic transmission to
position P.
It may not be possible to release an applied
parking brake, if the on-board voltage is low
or there is a malfunction in the system.
Contact a qualified specialist workshop.
i The electric parking brake performs a
function test at regular intervals while the
engine is switched off. The sounds that can
be heard while this is occurring are normal.
Applying/releasing manually X
To engage: push handle :.
When the electric parking brake is
engaged, the F(USA only) or !
(Canada only) red indicator lamp lights up
in the instrument cluster.
i The electric parking brake can also be
applied when the SmartKey is removed.
X To release: pull handle:.
The red F(USA only) or !(Canada
only) indicator lamp in the instrument
cluster goes out.
i The electric parking brake can only be
released: R
if the SmartKey is in position 1in the
ignition lock or
R if the ignition was switched on using the
Start/Stop button.
To ensure that you do not roll backwards
when pulling away on an uphill slope, engage
the electric parking brake (Y page 170).
Applying automatically The electric parking brake is applied
automatically:
R
if DISTRONIC PLUS brings the vehicle to a
standstill or
R if the HOLD function is keeping the vehicle
stationary
In addition, at least one of the following
conditions must be fulfilled:
R the engine is switched off.
R the driver's door is open and the seat belt
is not fastened.
R the vehicle is stationary for a lengthy
period.
The red F(USA only) or !(Canada
only) indicator lamp in the instrument cluster
lights up.
Releasing automatically The electric parking brake is released
automatically when all of the following
conditions are fulfilled:
R
the engine is running.
R the transmission is in position Dor R.
R the seat belt has been fastened.
R you depress the accelerator pedal.
If the transmission is in position R, the trunk
lid must be closed.
If your seat belt is not fastened, the following
conditions must be fulfilled to automatically
release the electric parking brake:
R the driver's door is closed.
R you have shifted out of transmission
position Por you have previously driven
faster than 2 mph (3 km/h). 190
ParkingDriving and parking

increases the stopping distance and can even
cause the braking system to fail. There is a
risk of an accident.
Never use the brake pedal as a footrest. Never
depress the brake pedal and the accelerator
pedal at the same time.
! Depressing the brake pedal constantly
results in excessive and premature wear to
the brake pads.
If the brakes have been subjected to a heavy
load, do not stop the vehicle immediately.
Drive on for a short while. This allows the
airflow to cool the brakes more quickly.
Wet roads If you have driven for a long time in heavy rain
without braking, there may be a delayed
reaction from the brakes when braking for the
first time. This may also occur after the
vehicle has been washed or driven through
deep water.
You then have to depress the brake pedal
more firmly. Maintain a greater distance from
the vehicle in front.
After driving on a wet road or having the
vehicle washed, brake firmly while paying
attention to the traffic conditions. This will
warm up the brake discs, thereby drying them
more quickly and protecting them against
corrosion.
Limited braking performance on salt-
treated roads If you drive on salted roads, a layer of salt
residue may form on the brake discs and
brake pads. This can result in a significantly
longer braking distance.
R Brake occasionally to remove any possible
salt residue. Make sure that you do not
endanger other road users when doing so.
R Carefully depress the brake pedal and the
beginning and end of a journey.
R Maintain a greater distance to the vehicle
ahead. 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 a qualified specialist workshop.
! 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.
! Because ESP ®
is an automatic system,
the engine and ignition must be switched
off (SmartKey in position 0or 1or Start/
Stop button in position 0or 1) when the
electric parking brake is being tested on a
brake dynamometer (maximum
10 seconds).
Braking triggered automatically by ESP ®
may seriously damage the brake system.
All checks and maintenance work on the
brake system must be carried out at a
qualified specialist workshop. Consult a
qualified specialist workshop to arrange this.
Have brake pads installed and brake fluid
replaced at a qualified specialist workshop.
If the brake system has only been subject to
moderate loads, you should test the
functionality of your brakes at regular
intervals. To do so, press firmly on the brake
pedal when driving at a high speed. This
improves the grip of the brake pads.
You can find a description of Brake Assist
(BAS) on (Y page 68) or of BAS PLUS on
(Y page 68). 194
Driving tipsDriving and parking

During the adjustment, the
Lowering
Lowering
message, for example, appears in the
multifunction display.
If you press the %ora button on the
multifunction steering wheel, the message
will disappear. Once highway level has been
reached, all indicator lamps =go out.
The vehicle automatically selects highway
level if you are driving at a speed above
70 mph (115 km/h) or if you drive at a speed
between 62 mph (100 km/h) and 70 mph
(115 km/h) for approximately 20 seconds.
The vehicle is lowered to high-speed level if
you are traveling at higher speeds.
Off-road levels General notes
R
Only select off-road level 3 for driving off-
road in particularly rough terrain.
R Adjust your driving style to the altered
handling characteristics.
R Do not drive at speeds above 12 mph
(20 km/h). Only select an off-road level when this is
appropriate for road conditions. Otherwise,
fuel consumption increases and handling may
be affected.
X
Start the engine.
X Selector wheel :
: engaged: briefly press
selector wheel :.
Selector wheel :extends.
X To raise: turn selector wheel :
clockwise ;.
The vehicle is raised.
or
X To lower: turn selector wheel :counter-
clockwise ?.
The vehicle is lowered.
Indicator lamps =for the desired off-road
level flash:
R Off-road level 1: the lower indicator lamp
flashes
R Off-road level 2: the lower and center
indicator lamps flash
R Off-road level 3: all three indicator lamps
flash
The vehicle adjusts to the off-road level
selected. As soon as an off-road level is
reached, the corresponding indicator lamp
stops flashing and lights up constantly.
Raising the vehicle
During the adjustment, the Vehicle
Vehicle
Rising Rising message, for example, appears in the
multifunction display.
The vehicle rises from highway level to off-
road level 1.
If you press the %ora button on the
multifunction steering wheel, the message
will disappear.
i Up to off-road level 2, you can hide the
messages using the %ora button
on the multifunction steering wheel.
Once off-road level 2 has been reached, the
lower and center indicator lamps of the
selector wheel are on. 214
Driving systemsDriving an
d parking

Active Parking Assist will only detect parking
spaces:
R that are parallel to the direction of travel
R that are at least 59 in (1.5 m) wide
R that are at least 51 in (1.3 m) longer than
your vehicle
When driving at speeds below 19 mph
(30 km/h), you will see parking symbol as a
status indicator in the instrument cluster.
When a parking space has been detected, an
arrow towards the right or the left also
appears. By default, Active Parking Assist
only displays parking spaces on the front-
passenger side. Parking spaces on the
driver's side are displayed as soon as the turn
signal on the driver's side is activated. When
parking on the driver's side, this must remain
switched on until you acknowledge the use of
Active Parking Assist by pressing the a
button on the multifunction steering wheel.
A parking space is displayed while you are
driving past it, and until you are
approximately 50 ft (15 m) away from it.
Parking G
WARNING
Active Parking Assist merely aids you by
intervening actively in the steering. If you do
not brake there is a risk of an accident.
Always apply the brakes yourself when
maneuvering and parking.
X Stop the vehicle when the parking space
symbol shows the desired parking space in
the instrument cluster.
X Shift the transmission to position R.
The Start Park Assist? Yes: OK No:
Start Park Assist? Yes: OK No:
% message appears in the multifunction
display. X
To cancel the procedure: press the
% button on the multifunction steering
wheel or pull away.
or
X To park using Active Parking Assist:
press the abutton on the multifunction
steering wheel.
The Park Assist Active Accelerate Park Assist Active Accelerate
and Brake Observe Surroundings and Brake Observe Surroundings
message appears in the multifunction
display.
X Let go of the multifunction steering wheel.
X Back up the vehicle, being ready to brake
at all times. When backing up, drive at a
speed below approximately 6 mph
(10 km/h). Otherwise Active Parking Assist
will be canceled.
i In tight parking spaces, you will achieve
the best parking results by backing up as
far as possible. When doing so, also
observe the PARKTRONIC messages.
X Stop as soon as PARKTRONIC sounds the
continuous warning tone, if not before.
Maneuvering may be required in tight
parking spaces.
The Park Assist active Select D
Park Assist active Select D
Observe Observe surroundings
surroundings message appears in
the multifunction display.
X Shift the transmission to position Dwhile
the vehicle is stationary.
Active Parking Assist immediately steers in
the other direction.
The Park Assist active Accelerate Park Assist active Accelerate
and brake Observe surroundings
and brake Observe surroundings
message appears in the multifunction
display.
i You will achieve the best results by
waiting for the steering procedure to
complete before pulling away.
X Drive forwards and be ready to brake at all
times.
X Stop as soon as PARKTRONIC sounds the
continuous warning tone, if not before. 228
Driving systemsDriving an
d parking

The
Park Assist active Select R
Park Assist active Select R
Observe
Observe surroundings
surroundings message appears in
the multifunction display.
As soon as the parking procedure is
complete, the Park Assist switched off
Park Assist switched off
message appears and a warning tone sounds.
Active Parking Assist no longer supports you
with steering interventions. When Active
Parking Assist is finished, you must steer
again yourself. PARKTRONIC is still available.
Parking tips:
R The way your vehicle is positioned in the
parking space after parking is dependent
on various factors. These include the
position and shape of the vehicles parked
in front and behind it and the conditions of
the location. It may be the case that Active
Parking Assist guides you too far into a
parking space, or not far enough into it. In
some cases, it may also lead you across or
onto the curb. If necessary, you should
cancel the parking procedure with Active
Parking Assist.
R You can also select preselect transmission
position D. The vehicle redirects and does
not drive as far into the parking space.
Should the gear change occur too soon to
achieve a sensible parking position, the
parking procedure will be aborted.
Exiting a parking space In order that Active Parking Assist can
support you when you exit the parking space:
R you need to have parked using Active
Parking Assist.
R the border of the parking space must be
high enough at the front and the rear. A
curb stone is too small, for example.
R the border of the parking space must not
be too wide, as the position of the vehicle
must not exceed an angle of 45° to the
starting position as it is maneuvered into
the parking space.
R a maneuvering distance of at least 3.3 ft
(1.0 m) must be available. X
Start the engine.
X Switch on the turn signal in the direction
you are pulling away.
X Shift the transmission to position Dor R.
The Start Park Assist? Yes: OK No:
Start Park Assist? Yes: OK No:
% message appears in the multifunction
display.
X To cancel the procedure: press the
% button on the multifunction steering
wheel or pull away.
or
X To exit a parking space using Active
Parking Assist: press theabutton on
the multifunction steering wheel.
The Park Assist active Accelerate Park Assist active Accelerate
and brake Observe surroundings
and brake Observe surroundings
message appears in the multifunction
display.
X Let go of the multifunction steering wheel.
X Reverse the vehicle or drive forwards, being
ready to brake at all times. Do not exceed
a maximum speed of approximately
6 mph (10 km/h) when exiting a parking
space. Otherwise Active Parking Assist will
be canceled.
X Stop as soon as PARKTRONIC sounds the
continuous warning tone, if not before.
X Shift the transmission to position Dor Ras
required while the vehicle is stationary.
Active Parking Assist immediately steers in
the other direction.
i You will achieve the best results by
waiting for the steering procedure to
complete before pulling away.
If you back up after activation, the steering
wheel is moved to the straight-ahead
position.
X Drive forwards or back up the vehicle, being
ready to brake at all times.
X Stop as soon as PARKTRONIC sounds the
continuous warning tone, if not before.
X Drive forwards and back up as prompted by
the PARKTRONIC warning displays, several
times if necessary. Driving systems
229Driving and parking Z

Left control panel
=
; R
Calls up the menu and menu bar 9
:
Press briefly:
R
Scrolls in lists
R Selects a submenu or function
R In the Audio Audio menu: selects a
stored station, an audio track or
a video scene
R In the Tel Tel(telephone) menu:
switches to the phone book and
selects a name or telephone
number 9
:
Press and hold:
R
In the Audio Audio menu: selects the
previous/next station or selects
an audio track or a video scene
using rapid scrolling
R In the Tel Tel(Telephone) menu:
starts rapid scrolling if the phone
book is open a R
Confirms a selection/display
message
R In the Tel Tel(telephone) menu:
switches to the telephone book
and starts dialing the selected
number
R In the Audio 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
memory 6 R
Makes or accepts a call
R Switches to the redial memory W
X R
Adjusts the volume 8 R
Mute Back button
%
Press briefly:
R
Back
R Switches off the Voice Control
System; see the separate
operating instructions
R Hides display messages/calls
up the last Trip Tripmenu function
used
R Exits the telephone book/redial
memory %
Press and hold:
R
Calls up the standard display in
the Trip Trip menu Multifunction display
:
Time
; Permanent display: outside temperature
or speed (Y page 283)
= Text field
? Menu bar 274
Displays and operationOn-board computer and displays

Dialing a number from the phone book
X
Press the =or; button on the
steering wheel to select the Tel
Tel menu.
X Press the 9,:ora button to
switch to the phone book.
X Press the 9or: button to select the
desired name.
or
X To begin rapid scrolling: press and hold
the 9 or: button for longer than
one second.
Rapid scrolling stops when you release the
button or reach the end of the list.
X If only one telephone number is stored
for a name: press the6ora button
to start dialing.
or
X If there is more than one number for a
particular name: press the6ora
button to display the numbers.
X Press the 9or: button to select the
number you want to dial.
X Press the 6ora button to start
dialing.
or
X To exit the telephone book: press the
~ or% button.
Redialing The on-board computer saves the last names
or numbers dialed in the redial memory.
X Press the =or; button on the
steering wheel to select the Tel
Tel menu.
X Press the 6button to switch to the
redial memory.
X Press the 9or: button to select the
desired name or number.
X Press the 6ora button to start
dialing.
or
X To exit the redial memory: press the
~ or% button. Assistance menu
Introduction In the
DriveAssist DriveAssist menu, you have the
following options:
R Displaying the assistance graphic
(Y page 280)
R Activating/deactivating the distance
warning function (Y page 281)
R Activating/deactivating PRE-SAFE ®
Brake
(Y page 281)
R Activating/deactivating ATTENTION
ASSIST (Y page 281)
R Activating/deactivating Blind Spot Assist
or Active Blind Spot Assist (Y page 281)
R Activating/deactivating Lane Keeping
Assist or Active Lane Keeping Assist
(Y page 282)
Displaying the assistance graphic X
Press =or; on the steering wheel
to select the DriveAssist DriveAssist menu.
X Press 9or: to select Assistance
Assistance
Graphic
Graphic.
X Press the abutton.
The multifunction display shows the
DISTRONIC PLUS distance display in the
assistance graphic ( Ypage 210).
The assistance graphic can display the status
of and information from other driving systems
or driving safety systems.
The assistance graphic shows:
R the é symbol when ATTENTION ASSIST
(Y page 239) is deactivated.
R the lane markings as bright lines when Lane
Keeping Assist (Y page 245) or Active Lane
Keeping Assist (Y page 251) is activated.280
Menus and submenusOn-boa
rdcompu ter and displays

X
Press the =or; button to select
Interm. Time
Interm. Time.
X Press ato confirm.
The intermediate time is displayed for five
seconds.
Starting a new lap :
RACETIMER
; Fastest lap time (best lap)
= Lap
X Press ato confirm New Lap
New Lap.
i It is possible to store a maximum of
sixteen laps. The 16th lap can only be
completed with Finish Lap
Finish Lap.
Stopping the RACETIMER X
Press the %button on the steering
wheel.
X Press ato confirm Yes
Yes.
The RACETIMER interrupts timing when you
stop the vehicle and turn the SmartKey to
position 1in the ignition lock. If you turn the
SmartKey to position 2or 3and then press
a to confirm Start
Start, timing is continued.
Resetting the current lap
X Stop the RACETIMER.
X Press the =or; button to select
Reset Lap
Reset Lap.
X Press ato 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.
X
Reset the current lap.
X Press ato confirm Reset Reset.
Reset Race Timer?
Reset Race Timer? appears in the
multifunction display.
X Press the :button to select Yes
Yes and
press the abutton to confirm.
All laps are deleted.
Overall statistics :
RACETIMER overall evaluation
; Total time driven
= Average speed
? Distance covered
A Maximum speed
This function is shown if you have stored at
least one lap and stopped the RACETIMER.
X Press =or; on the steering wheel
to select the AMG AMGmenu.
X Press the 9button repeatedly until the
overall evaluation is shown. 288
Menus and submenusOn-board computer and displays

Example: engine oil cap
X
Turn cap :counter-clockwise and remove
it.
X Add engine oil.
If the oil level is at or below the MIN mark
on the oil dipstick, add 1.1 US qt (1.0 l) of
engine oil.
X Replace cap :on the filler neck and turn
clockwise.
Ensure that the cap locks into place
securely.
X Check the oil level again with the oil
dipstick (Y page 371).
Further information on engine oil
(Y page 449). Additional service products
Checking coolant level G
WARNING
Certain components in the engine
compartment, such as the engine, radiator
and parts of the exhaust system, can become
very hot. Working in the engine compartment
poses a risk of injury.
Where possible, let the engine cool down and
touch only the components described in the
following. G
WARNING
The engine cooling system is pressurized,
particularly when the engine is warm. When opening the cap, you could be scalded by hot
coolant spraying out. There is a risk of injury.
Let the engine cool down before opening the
cap. Wear eye and hand protection when
opening the cap. Open the cap slowly half a
turn to allow pressure to escape.
X
Park the vehicle on a level surface.
Only check the coolant level when the
vehicle is on a level surface and the engine
has cooled down.
X Turn the SmartKey to position 2in the
ignition lock (Y page 167).
On vehicles with KEYLESS-GO, press the
Start/Stop button twice (Y page 167).
X Check the coolant temperature gauge in
the multifunction display.
The coolant temperature must be below
158 ‡ (70 †).
X Turn the SmartKey to position
0(Y page 167) in the ignition lock.
X Slowly turn cap :half a turn counter-
clockwise to allow excess pressure to
escape.
X Turn cap :further counter-clockwise and
remove it.
If the coolant is at the level of marker bar
= in the filler neck when cold, there is
enough coolant in coolant expansion
tank ;.
If the coolant level is approximately 0.6 in
(1.5 cm) above marker bar =in the filler
neck when warm, there is enough coolant
in expansion tank ;. Engine compartment
373Maintenance and care Z