2014 MERCEDES-BENZ GL-Class brake light

Overview: changing bulbs/bulb types
You can change the following bulbs. The bulb
type can be found in the legend. Halogen headlamps
:
Low-beam headlamp: H7 55 W
; High-beam headlamp: H7 55 W Tail lamp
:
Brake lamp: P 21 W-L Changing the front bulbs
Removing and installing the cover in the
front wheel housing You must remove the cover from the front
wheel housing before you can change the
front bulbs. X
To remove: switch off the lights.
X Turn the front wheels inwards.
X Remove securing pin ;using a suitable
tool.
X Slide cover :up and remove it.
X To install: insert cover :again and slide
it down until it engages.
X Insert securing pin ;.
Low-beam headlamps (halogen
headlamps) X
Remove the cover in the front wheel
housing (Y page 138).
X Turn housing cover :counter-clockwise
and pull it out.
X Turn bulb holder ;counter-clockwise and
pull it out.
X Take the bulb out of bulb holder ;.
X Insert the new bulb into bulb holder ;.
X Insert bulb holder ;into the lamp and turn
it clockwise. 138
Replacing bulbsLights and windshield wipers

X
Align housing cover :and turn it
clockwise until it engages.
X Replace the cover in the front wheel
housing (Y page 138).
High-beam headlamps (halogen
headlamps) X
Switch off the lights.
X Open the hood.
X Turn housing cover :counter-clockwise
and pull it out.
X Pull lever =upwards and remove bulb
holder ;.
X Take the bulb out of bulb holder ;.
X Insert the new bulb into bulb holder ;.
X Simultaneously press bulb holder ;and
pull lever =downwards.
X Align housing cover :and turn it
clockwise until it engages. Changing the rear bulbs
Opening and closing the service flap Left-hand service flap
Right-hand service flap
You must open the service flap in the cargo
compartment before you can change the
bulbs in the brake lamp.
X
To open: release service flap :at the top,
e.g. with a screwdriver, and swing it
downward in the direction of the arrow.
X Right side: remove the first-aid kit
beforehand and pull the parcel net down.
X To close: reinsert service flap :. Replacing bulbs
139Lights andwindshield wipers Z

Brake lamp
X
Switch off the lights.
X Open the cargo compartment.
X Open the service flap (Y page 139).
X Turn bulb holder :counter-clockwise and
remove it.
X Take bulb out of bulb holder :.
X Insert the new bulb into bulb holder :.
X Insert bulb holder :into the lamp and turn
it clockwise.
X Close the service flap (Y page 139).Windshield wipers
Switching the windshield wipers on/
off
! Do not operate the windshield wipers
when the windshield is dry, as this could
damage the wiper blades. Moreover, dust
that has collected on the windshield can
scratch the glass if wiping takes place when
the windshield is dry.
If it is necessary to switch on the windshield
wipers in dry weather conditions, always
use washer fluid when operating the
windshield wipers.
! If the windshield wipers leave smears on
the windshield after the vehicle has been
washed in an automatic car wash, wax or
other residues may be the reason for this.
Clean the windshield using washer fluid
after washing the vehicle in an automatic
car wash. !
Intermittent wiping with rain sensor: due
to optical influences and the windshield
becoming dirty in dry weather conditions,
the windshield wipers may be activated
inadvertently. This could then damage the
windshield wiper blades or scratch the
windshield.
For this reason, you should always switch
off the windshield wipers in dry weather. Combination switch
1
$ Windshield wiper off
2 Ä Intermittent wipe, low (rain sensor
set to low sensitivity)
3 Å Intermittent wipe, high (rain sensor
set to high sensitivity)
4 ° Continuous wipe, slow
5 ¯ Continuous wipe, fast
B í Single wipe
C î To wipe with washer fluid
X Switch on the ignition.
X Turn the combination switch to the
corresponding position.
In the ÄorÅ position, the appropriate
wiping frequency is set automatically
according to the intensity of the rain. In
the Å position, the rain sensor is more
sensitive than in the Äposition, causing
the windshield wipers to wipe more
frequently.
If the wiper blades are worn, the windshield
will no longer be wiped properly. This could
prevent you from observing the traffic
conditions. 140
Windshield wipersLights and
windshield wipers

GO function and a detachable Start/Stop
button.
The Start/Stop button must be inserted in the
ignition lock and the SmartKey with the
integrated KEYLESS-GO function must be in
the vehicle.
Pressing the Start/Stop button several times
in succession corresponds to the different
key positions in the ignition lock. This is only
the case if you are not depressing the brake
pedal.
If you depress the brake pedal and press the
Start/Stop button, the engine starts
immediately.
The Start/Stop button can be removed from
the ignition lock. Then, you can insert the
SmartKey into the ignition lock.
i You do not have to remove the Start/Stop
button from the ignition lock when you
leave the vehicle. You should, however,
always take the SmartKey with you when
leaving the vehicle. As long as the
SmartKey is in the vehicle:
R the vehicle can be started using the
Start/Stop button and
R electrically powered equipment can be
operated.
i The engine can be turned off while the
vehicle is in motion by pressing and holding
the Start/Stop button for approximately
three seconds.
Key positions with KEYLESS-GO If Start/Stop button
:has not yet been
pressed, this corresponds to the SmartKey
being removed from the ignition.
As soon as the ignition is switched on, all the
indicator lamps in the instrument cluster light
up. If an indicator lamp does not go out after
starting the engine or lights up while driving,
see (Y page 326).
X Insert Start/Stop button :into ignition
lock ;.
i When you insert Start/Stop button :
into ignition lock ;, the system needs
approximately two seconds recognition
time. You can then use Start/Stop
button :.
X To switch on the power supply: press
Start/Stop button :once.
The power supply is switched on. You can
now activate the windshield wipers, for
example.
i The power supply is switched off again if:
R the driver's door is opened and
R you press Start/Stop button :twice
when in this position.
X To switch on the ignition: press Start/
Stop button :twice.
The ignition is switched on.
i The power supply is switched off again if:
R the driver's door is opened and
R you press Start/Stop button :once
when in this position. 168
DrivingDriving and pa
rking

Start/Stop button
=
USA only
? Canada only Starting the engine
Important safety notes G
WARNING
If children are left unsupervised in the vehicle,
they could:
R open the doors, thus endangering other
people or road users.
R get out and disrupt traffic.
R operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
R release the parking brake.
R shifting the automatic transmission out of
park position P
R Start the engine.
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 or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children. G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases leads to poisoning. There
is a risk of fatal injury. Therefore never leave the engine running in enclosed spaces
without sufficient ventilation.
G
WARNING
Flammable materials introduced through
environmental influence or by animals can
ignite if in contact with the exhaust system or
parts of the engine that heat up. There is a risk
of fire.
Carry out regular checks to make sure that
there are no flammable foreign materials in
the engine compartment or in the exhaust
system.
i Vehicles with a gasoline engine: the
catalytic converter is preheated for up
30 seconds after a cold start. The sound of
the engine may change during this time.
Automatic transmission X
Shift the transmission to position P
(Y page 173).
The transmission position display in the
multifunction display shows P
(Y page 173).
i You can also start the engine when the
transmission is in position N.
Starting procedure with the SmartKey X
To start a gasoline engine: turn the
SmartKey to position 3in the ignition lock
(Y page 167) and release it as soon as the
engine is running.
X To start a diesel engine: turn the
SmartKey to position 2in the ignition lock
(Y page 167).
The % preglow indicator lamp in the
instrument cluster lights up.
X When the %preglow indicator lamp
goes out, turn the SmartKey to position 3
(Y page 167) and release it as soon as the
engine is running.
i You can start the engine without preglow
if the engine is warm. Driving
169Driving 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

in the ECO display does not indicate a fixed
consumption.
Apart from driving style, consumption is
dependent on many factors such as, e.g.:
R Load
R Tire pressure
R Cold start
R Choice of route
R Electrical consumers switched on
These factors are not included in the ECO
display.
The evaluation of your driving style is carried
out using the following three categories:
R Acceleration
Acceleration (evaluation of all
acceleration processes):
- The bar fills up: moderate acceleration,
especially at higher speeds
- The bar empties: sporty acceleration
R Constant Constant (assessment of driving behavior
at all times):
- The bar fills up: constant speed and
avoidance of unnecessary acceleration
and deceleration
- The bar empties: fluctuations in speed
R Coasting
Coasting (assessment of all deceleration
processes):
- The bar fills up: anticipatory driving,
keeping your distance and early release
of the accelerator. The vehicle can coast
without use of the brakes.
- The bar empties: frequent braking
i An economical driving style specially
requires driving at moderate engine
speeds.
To achieve a higher value in the categories
Acceleration
Acceleration andConstant Constant , observe the
gearshift recommendations.
i On long journeys at a constant speed, e.g.
on the highway, only the bar for Constant
Constant
will change.
i The ECO display summarizes the driving
characteristics from the start of the journey
to its completion. For this reason, the bars change dynamically at the beginning of the
journey. On longer journeys, there are
fewer changes. For more dynamic changes,
carry out a manual reset.
For further information on the ECO display,
see (Y page 276). Braking
Important safety notes G
WARNING
If you shift down on a slippery road surface in
an attempt to increase the engine's braking
effect, the drive wheels could lose their grip.
There is an increased danger of skidding and
accidents.
Do not shift down for additional engine
braking on a slippery road surface.
Downhill gradients !
On long and steep gradients, you must
reduce the load on the brakes by shifting
early to a lower gear. This allows you to take
advantage of the engine braking effect and
helps avoid overheating and excessive
wear of the brakes.
When you take advantage of the engine
braking effect, a drive wheel may not turn
for some time, e.g. on a slippery road
surface. This could cause damage to the
drive train. This type of damage is not
covered by the Mercedes-Benz warranty.
Do not depress the brake pedal continuously
while the vehicle is in motion, e.g. causing the
brakes to rub by constantly applying light
pressure to the pedal. This results in
excessive and premature wear to the brake
pads.
Heavy and light loads G
WARNING
If you rest your foot on the brake pedal while
driving, the braking system can overheat. This Driving tips
193Driving and parking
Z

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