2017 MERCEDES-BENZ GLA SUV brake

The warning vibration occurs earlier in the fol-
lowing situations if:
R you approach the outer lane marking on a
bend
R the road has very wide lanes, e.g. a motorway
R the system detects solid lane markings
The warning vibration occurs later in the follow-
ing situations if:
R the road has narrow lanes
R you cut the corner on a bend Towing a trailer
Important safety notes
G
WARNING
You could lose control of the vehicle/trailer
combination if it begins to swerve. The vehi-
cle/trailer combination could even overturn.
There is a risk of an accident.
On no account should you attempt to
straighten out the vehicle/trailer combina-
tion by increasing speed. Decrease your
speed and do not countersteer. Brake if nec-
essary. G
WARNING
If the maximum permissible load for a carrier system is exceeded, the carrier could come
loose from the vehicle and endanger other
road users. There is a risk of an accident and injury.
Never exceed the maximum permissible load
when using a carrier.
! If you have a trailer tow hitch retrofitted,
changes to the engine cooling system may be necessary, depending on the vehicle type.
If you have a trailer tow hitch retrofitted,
observe the anchorage points on the chassis.
Retrofitting a trailer tow hitch is only permissible
if a trailer load is specified in your vehicle docu-
ments. If this is not the case, then the vehicle is not approved for towing a trailer.
For more information, please contact a qualifiedspecialist workshop. Exceeding the maximum permissible nose-
weight of the trailer drawbar on the ball coupling
may cause damage to the following:
R your vehicle
R trailer
R ball coupling
R trailer tow hitch
The vehicle/trailer combination could become
unstable.
The vehicle/trailer combination could also
become unstable if the noseweight used is lower than the minimum permissible noseweight.
To avoid hazardous situations:
R make sure to check the noseweight before
each journey
R the noseweight should be as close as possible
to the maximum noseweight
R do not exceed the maximum permissible
noseweight
R the noseweight must not be lower than the
minimum permissible noseweight
Make sure that the following values are not
exceeded:
R the permissible noseweight
R the permissible trailer load
R the permissible rear axle load of the towing
vehicle
R the maximum permissible gross vehicle
weight of both the towing vehicle and the
trailer
The applicable permissible values, which must
not be exceeded, can be found:
R in your vehicle documents
R on the identification plates of the trailer tow
hitch and the trailer
R on the vehicle identification plate
If the values differ, the lowest value applies.
You will find the values approved by the manu-
facturer on the identification plates and for the
towing vehicle under "Technical data"
(Y page 359). G
WARNING
If you release the ball coupling or it does not
engage correctly when folding in, it will swing out. Within pivoting range of the ball coupling,
there is an increased risk of an accident and
injury. 212
Towing a trailerDriving and parking

Only release the ball coupling if the pivoting
range is unobstructed. Always make sure that the ball coupling engages when folding in.
When reversing the towing vehicle, make sure
there is nobody between the trailer and the vehi- cle.
Couple and uncouple the trailer carefully. If youdo not couple the trailer to the towing vehicle
correctly, the trailer could become detached.
When towing a trailer, your vehicle's handling
characteristics will be different to when driving
without a trailer.
The vehicle/trailer combination:
R is heavier
R is restricted in its acceleration and gradient-
climbing capability
R has an increased braking distance
R is affected more by strong crosswinds
R demands more sensitive steering
R has a larger turning circle
This can impair the vehicle's handling charac-
teristics. Adapt your driving style accordingly.
Maintain a safe distance. Drive carefully.
When towing a trailer, always adjust your speed to the current road and weather conditions. Do
not exceed the maximum permissible speed for
your vehicle/trailer combination. Notes on towing a trailer
General notes Trailer towing is not possible on the following
models:
R Mercedes‑AMG GLA 45 4MATIC
Items of optional equipment may influence the
effective trailer loads for the vehicle. Please find the applicable trailer loads for your vehicle on
the registration certificate.
When towing a trailer, set the tyre pressure on
the rear axle of the towing vehicle for a maxi-
mum load. Further information on the tyre pres-
sure table in the fuel filler flap (Y page 337).
Please note that when towing a trailer, the fol-
lowing driving systems have limited availability
or are not available at all:
R Parking Assist PARKTRONIC (Y page 193)
R Blind Spot Assist (Y page 209) The height of the ball coupling changes with the
load of the vehicle. If necessary, use a trailer
with a height-adjustable drawbar.
You will find fitting dimensions and loads under"Technical data" (Y page 359).
Driving tips Observe the information on ESP
®
trailer stabili-
sation (Y page 75).
The maximum permissible speed for vehicle/
trailer combinations depends on the type of
trailer. Before beginning the journey, check the
trailer's documents to see what the maximum
permitted speed is. Observe the legally prescri-
bed maximum speed in the relevant country.
For certain Mercedes-Benz vehicles, the maxi-
mum permissible rear axle load is increased
when towing a trailer. See the "Technical data"
section to find out whether this applies to your
vehicle. If when towing, the rear axle load is
increased even partly, the vehicle/trailer com-
bination may not exceed a maximum speed of
100 km/h for reasons concerning the operating
permit. This also applies in countries in which
the permissible maximum speed for vehicle/
trailer combinations is above 100 km/h.
When towing a trailer, your vehicle's handling
characteristics will be different to when driving
without a trailer and the vehicle will consume
more fuel.
Shift to a lower gear in good time on long and
steep downhill gradients. For vehicles with auto-
matic transmission, you need to have selected
manual drive program M(Y page 161).
This also applies if you have activated cruise
control, the speed limiter or Distance Pilot
DISTRONIC.
This will use the braking effect of the engine, so less braking will be required to maintain the
vehicle speed. This relieves the load on the
brake system and prevents the brakes from
overheating and wearing too quickly. If you need
additional braking, depress the brake pedal
repeatedly rather than continuously.
Briefly depressing the accelerator pedal on
downhill gradients while the manual drive pro-
gram Mis temporarily activated (vehicles with
automatic transmission): the automatic trans-
mission may switch back to the last active auto-
matic drive program Eor S. The automatic trans-
mission may shift to a higher gear. This can
reduce the engine's braking effect. Towing a trailer
213Driving and parking Z

Driving tips
R
Maintain a greater distance to the vehicle in
front than when driving without a trailer.
R Avoid braking abruptly. If possible, brake gen-
tly at first to allow the trailer to run on. Then,
increase the braking force rapidly.
R The values given for gradient-climbing capa-
bilities from a standstill refer to sea level.
When driving in mountainous areas, note that
the power output of the engine, and conse-
quently the vehicle's gradient-climbing capa-
bility from a standstill, decrease with increas- ing altitude.
If the trailer swings from side to side:
X Do not accelerate under any circumstances
X Do not countersteer
X Brake if necessary Folding out the ball coupling
Folding out the ball coupling G
WARNING
If the ball coupling is not correctly engaged,
the trailer can detach. There is a risk of an
accident.
Always engage the ball coupling as described. G
WARNING
If you release the ball coupling or it does not
engage correctly when folding in, it will swing out. Within pivoting range of the ball coupling,
there is an increased risk of an accident and
injury.
Only release the ball coupling if the pivoting
range is unobstructed. Always make sure that the ball coupling engages when folding in.
Before you can tow a trailer with your vehicle,
you must fold out the ball coupling.
The release wheel is located behind the left-
hand side trim panel in the luggage compart-
ment. X
To open the cover: turn handle:anti-
clockwise, the fold down and remove
cover ;. X
Pull out release wheel =.
X Turn release wheel =anti-clockwise as far as
it will go.
The ball coupling disengages and folds out
behind the rear bumper. Indicator lamp ?
flashes. X
Pull the ball coupling in the direction of the
arrow until it engages in a vertical position.
The indicator lamp on the release wheel goes out. The power socket folds down automati-
cally. 214
Towing a trailerDriving and pa
rking

The multifunction display shows the
Check
Check
trailer hitch lock
trailer hitch lock display message until
the ball coupling is engaged.
X Remove the protective cap from the ball cou-
pling and store it in a safe place.
X Make sure that the ball of the ball coupling is
clean and that it is either greased or dry
(grease free), depending on the instructions
for the trailer.
Folding in the ball coupling G
WARNING
If you release the ball coupling or it does not
engage correctly when folding in, it will swing out. Within pivoting range of the ball coupling,
there is an increased risk of an accident and
injury.
Only release the ball coupling if the pivoting
range is unobstructed. Always make sure that the ball coupling engages when folding in.
i Fold the ball coupling in if you are not using
the trailer tow hitch.
X Make sure that the vehicle is stationary and
the trailer cables are disconnected.
X Place the protective cap on the ball coupling.
i The release wheel is located behind the left-
hand side trim panel in the luggage compart- ment.
X To open the cover: turn handle:anti-
clockwise, then fold down and remove
cover ;.
X Pull out release wheel =.
X Turn release wheel =anti-clockwise as far as
it will go.
The ball coupling disengages and folds out
behind the rear bumper. Indicator lamp ?
flashes.
X Press the ball coupling until it engages audibly
behind the bumper.
The indicator lamp on the release knob and
the message in the multifunction display go
out. Coupling up a trailer
X Make sure that the transmission is in position
j.
X Apply the electric parking brake.
X Position the trailer on a level surface behind
the vehicle.
X Couple up the trailer.
X Establish the electrical connection between
the vehicle and the trailer.
X Check that the trailer lighting system is work-
ing.
A connected trailer is only detected when the
electrical connection is established correctly
and when the lighting system is working prop- erly. The function of other systems, such as
ESP ®
or PARKTRONIC also depends on this. Uncoupling a trailer
G
WARNING
If you uncouple a trailer with an engaged over- run brake, you could trap your hand between
the vehicle and the trailer drawbar. This poses a risk of injury.
Do not uncouple a trailer with an engaged
overrun brake.
! Do not disconnect a trailer with an engaged
overrun brake. Otherwise, your vehicle could
be damaged by the rebounding of the overrun brake.
! Remove the installed adapter cable before
folding in the ball coupling. Otherwise, dam-
age may occur to the rear bumper and the
adapter cable.
X Make sure that the transmission is in position
P.
X Apply the electric parking brake.
X Secure the trailer against rolling away.
X Remove the trailer cable and decouple the
trailer. Trailer power supply
! You can connect accessories to the perma-
nent power supply up to a maximum of 240 W. Towing a trailer
215Driving and parking Z

Redialling
The on-board computer saves the last names or
numbers dialled in the redial memory.
X Press the =or; button on the steering
wheel to select the Tel
Telmenu.
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 dial-
ling.
or X If you do not want to make the call: press
the ~ or% button. Assistance menu
Introduction Depending on the equipment fitted in the vehi-
cle, you have the following options in the
Assist.
Assist. menu:
R Showing the assistance graphic
(Y page 226)
R Activating/deactivating the Traffic Sign
Assist message function (Y page 226)
R Deactivating/activating ESP ®
(except
Mercedes‑AMG vehicles) (Y page 227)
R Activating/deactivating Active Brake Assist
(Y page 227)
R Activating/deactivating ATTENTION ASSIST
(Y page 227)
R Activating/deactivating Blind Spot Assist
(Y page 227)
R Activating/deactivating Lane Keeping Assist
(Y page 227) Showing the assistance graphic X
Press the =or; button on the steering
wheel to select the Assist. Assist.menu.
X Press 9or: to select Assistance
Assistance
graphic
graphic.
X Press ato confirm.
The multifunction display shows the Distance
Pilot DISTRONIC distance display in the assis- tance graphic display.
The assistance graphic shows you the status
of and/or information from the following driv-
ing systems or driving safety systems:
R Traffic Sign Assist (Y page 207)
R Distance Pilot DISTRONIC (Y page 180)
R Active Brake Assist (Y page 69)
R ATTENTION ASSIST (Y page 206)
R Lane Keeping Assist (Y page 210)
R DSR (Y page 190)
R Off-road program (Y page 192)
R Rear window wiper (Y page 124)
X Press :to display the ATTENTION ASSIST
assessment.
Traffic Sign Assist In the
Traffic Sign Assist Traffic Sign Assist menu, you can
switch the Traffic Sign Assist message function
on or off. When the message function is activa-
ted, detected traffic signs and information
appear in the multifunction display for five sec-
onds.
X Press the =or; button on the steering
wheel to select the Assist.
Assist. menu.
X Press the 9or: button to select
Traffic Sign Assist Traffic Sign Assist. 226
Menus and submenusOn-board computer and displays

X
Press ato confirm.
The current selection appears.
X To activate/deactivate the message func-
tion: press aagain.
Further information about Traffic Sign Assist
(Y page 207).
Deactivating/activating ESP ®Observe the important safety notes on ESP
®
(Y page 72). G
WARNING
If you deactivate ESP ®
, ESP ®
no longer sta-
bilises the vehicle. There is an increased risk
of skidding and an accident.
Only deactivate ESP ®
in the situations descri-
bed in the following.
It may be best to deactivate ESP ®
in the follow-
ing situations:
R when using snow chains
R in deep snow
R on sand or gravel
Deactivating/activating ESP ®
on Mercedes-
AMG vehicles (Y page 73).
For further information about ESP ®
, see
(Y page 72).
X Start the engine.
X Press the =or; button on the steering
wheel to select the Assist. Assist.menu.
X Press 9or: to select ESP ESP.
X Press ato confirm.
The current selection appears.
X To activate/deactivate: pressaagain.
ESP ®
is deactivated if the åwarning lamp
in the instrument cluster lights up continu-
ously when the engine is running.
If the ÷ andå warning lamps light up
continuously, ESP ®
is not available due to a mal-
function.
Observe the information on warning lamps
(Y page 269).
Observe the information on display messages
(Y page 235). Activating/deactivating Active Brake
Assist X
Press the =or; button on the steering
wheel to select the Assist. Assist.menu.
X Press the 9or: button to select
Brake Assist
Brake Assist.
X Press ato confirm.
The current selection appears.
X To activate/deactivate: pressaagain.
When Active Brake Assist is deactivated, the
æ symbol appears in the multifunction dis-
play in the assistance graphic display.
Further information on Active Brake Assist
(Y page 69).
Activating/deactivating ATTENTION
ASSIST X
Press the =or; button on the steering
wheel to select the Assist. Assist.menu.
X Press the 9or: button to select
Attention Assist Attention Assist.
X Press ato confirm.
The current selection appears.
X Press ato confirm.
X Press the :or9 button to set Off
Off,
Standard
Standard orSensitive
Sensitive.
X Press the abutton to save the setting.
When ATTENTION ASSIST is deactivated, the
é symbol appears in the multifunction dis-
play in the assistance graphic display.
For further information about ATTENTION
ASSIST, see (Y page 206).
Activating/deactivating Blind Spot
Assist X
Press the =or; button on the steering
wheel to select the Assist. Assist.menu.
X Press the 9or: button to select
Blind Spot Assist
Blind Spot Assist.
X Press ato confirm.
The current selection appears.
X To activate/deactivate: pressaagain.
Further information about Blind Spot Assist
(Y page 209). Menus and submenus
227On-board computer and displays Z

Safety systems
Display messages
Possible causes/consequences and
M
MSolutions !÷
currently unavaila‐
currently unavaila‐
ble ble See
SeeOwner's
Owner's Man‐
Man‐
ual
ual ABS (Anti-lock Braking System), BAS (Brake Assist System), ESP
®
(Electronic Stability Program), ESP ®
trailer stabilisation, the HOLD
function, hill start assist and PRE-SAFE ®
are temporarily unavailable.
Adaptive brake lights and Active Brake Assist may have also failed.
In addition, the !,÷andå warning lamps may light up in
the instrument cluster.
ATTENTION ASSIST is deactivated.
Possible causes:
R self-diagnosis is not yet complete
R the on-board voltage may be insufficient
G WARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you brake
hard, for example.
The steerability and braking characteristics may be severely affected. The braking distance may increase in an emergency braking situation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased risk of skidding and/or accident.
X Carefully drive on a suitable stretch of road, making slight steering
movements, at a speed above 20 km/h.
If the display message disappears, the functions mentioned above
are available again.
If the multifunction display still shows the display message: X Drive on carefully.
X Consult a qualified specialist workshop immediately. !÷
inoperative inoperative See
See Own‐
Own‐
er's Manual
er's Manual ABS, BAS, ESP
®
, ESP ®
trailer stabilisation, the HOLD function, hill
start assist and PRE-SAFE ®
are unavailable due to a malfunction.
Adaptive brake lights and Active Brake Assist may have also failed.
The !, ÷,åandJ warning lamps may also light up in the
instrument cluster.
ATTENTION ASSIST is deactivated.
G WARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you brake
hard, for example.
The steerability and braking characteristics may be severely affected. The braking distance may increase in an emergency braking situation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased risk of skidding and/or accident.
X Drive on carefully.
X Consult a qualified specialist workshop immediately. Display messages
235On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions ÷
currently unavaila‐ currently unavaila‐
ble ble
See
SeeOwner's
Owner's Man‐
Man‐
ual
ual ESP
®
, ESP ®
trailer stabilisation, BAS, the HOLD function, hill start
assist and PRE-SAFE ®
are temporarily unavailable.
Adaptive brake lights and Active Brake Assist may have also failed.
In addition, the ÷andå warning lamps may light up in the
instrument cluster.
ATTENTION ASSIST is deactivated.
The self-diagnosis function, for example, may not be complete.
G WARNING
The brake system continues to function normally, but without the
functions listed above.
The braking distance may thus increase in an emergency braking sit-
uation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased risk of skidding and/or accident.
X Carefully drive on a suitable stretch of road, making gentle steering
movements at speeds of above 20 km/h.
If the display message disappears, the functions mentioned above
are available again.
If the multifunction display still shows the display message:
X Drive on carefully.
X Consult a qualified specialist workshop immediately. ÷
inoperative inoperative
See
SeeOwn‐
Own‐
er's Manual
er's Manual ESP
®
, ESP ®
trailer stabilisation, BAS, the HOLD function, hill start
assist and PRE-SAFE ®
are unavailable due to a malfunction.
Adaptive brake lights and Active Brake Assist may have also failed.
In addition, the ÷andå warning lamps may light up in the
instrument cluster.
ATTENTION ASSIST is deactivated.
G WARNING
The brake system continues to function normally, but without the
functions listed above.
The braking distance may thus increase in an emergency braking sit-
uation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased risk of skidding and/or accident.
X Drive on carefully.
X Consult a qualified specialist workshop immediately. 236
Display
messagesOn-board computer and displays