2017 MERCEDES-BENZ GLS park assist

Labeling (overview) ........................ 361
Load bearing index (definition) ...... 366
Load index .................................... .3 63
Load index (definition) ................... 365
M+S tires ....................................... 348
Maximum load on a tire (defini-
tion) ............................................... 365
Maximum loaded vehicle weight
(definition) ..................................... 365
Maximum permissible tire pres-
sure (definition) ............................ .3 65
Maximum tire load ......................... 363
Maximum tire load (definition) ....... 365
MOExtended tires .......................... 348
Optional equipment weight (defi-
nition) ............................................ 366
PSI (pounds per square inch) (def-
inition) .......................................... .3 65
Replacing ....................................... 366
Service life ..................................... 347
Sidewall (definition) ....................... 366
Snow chains .................................. 348
Speed rating (definition) ................ 365
Storing .......................................... .3 67
Structure and characteristics
(definition) ..................................... 364
Summer tires in winter .................. 348
Temperature .................................. 360
TIN (Tire Identification Number)
(definition) ..................................... 366
Tire bead (definition) ..................... .3 65
Tire pressure (definition) ................ 365
Tire pressures (recommended) ...... 364
Tire size (data) ............................... 371
Tire size designation, load-bearing
capacity, speed rating .................... 361
Tire tread ....................................... 347
Tire tread (definition) ..................... 365
Total load limit (definition) ............. 366
Traction ......................................... 360
Traction (definition) ....................... 366
Tread wear ..................................... 360
TWR (permissible trailer drawbar
noseweig ht) ( definition) ................. 366
Uni
form Tire Quality Grading
Standards ...................................... 359
Uniform Tire Quality Grading
Standards (definition) .................... 364 Wear indicator (definition) ............. 366
Wheel and tire combination ........... 371
Wheel rim (definition) .................... 364
see Flat tire
Tool
see Vehicle tool kit
Top Tether ............................................ 60
Tow-starting
Emergency engine starting ............ 343
Important safety notes .................. 341
Towing a trailer
Axle load, permissible .................... 387
Cleaning the trailer tow hitch ......... 329
Coupling up a trailer ...................... 225
Decoupling a trailer ....................... 226
Driving tips .................................... 222
ESP ®
(Electronic Stability Pro-
gram) ............................................... 68
Important safety notes .................. 221
Installing the ball coupling ............. 223
Lights display message .................. 256
Mounting dimensions .................... 387
Parking Assist PARKTRONIC .......... 190
Power supply ................................. 227
Pulling away with a trailer .............. 141
Removing the ball coupling ............ 227
Trailer loads ................................... 387
Towing away
Important safety guidelines ........... 341
Installing the towing eye ................ 342
Notes for 4MATIC vehicles ............ 343
Removing the towing eye ............... 342
Transporting the vehicle ................ 343
With both axles on the ground ....... 342
Towing eye ......................................... 331
Traffic reports
see also Digital Operator's Man-
ual .................................................. 287
Traffic Sign Assist
Display message ............................ 264
Function/notes ............................. 206
Important safety notes .................. 206
Instrument cluster display ............. 206
Trailer coupling
see Towing a traile r
Trai l er loads and drawbar nose-
weights ............................................... 22722
Index

Trailer towing
Active Blind Spot Assist ................. 213
Active Lane Keeping Assist ............ 215
Blind Spot Assist ............................ 209
Permissible trailer loads and
drawbar noseweights ..................... 227
Transfer case ..................................... 153
Transmission
see Automatic transmission
Transmission position display ......... 148
Transporting the vehicle .................. 343
Traveling uphill
Brow of hill ..................................... 171
Driving downhill ............................. 172
Maximum gradient-climbing capa-
bility .............................................. .1 71
Trim pieces (cleaning instruc-
tions) ................................................. .3 30
Trip computer (on-board com-
puter) ................................................. .2 32
Trip odometer
Calling up ....................................... 232
Resetting (on-board computer) ...... 233
Trunk
see Tailgate
Turn signals
Display message ............................ 256
Replacing bulbs (front) ................... 119
Switching on/off ........................... 113
Two-way radio
Frequencies ................................... 376
Installation ..................................... 376
Transmission output (maximum) .... 376
TWR (Tongue Weight Rating) (defi-
nition) ................................................. 366
Type identification plate
see Vehicle identification plate
U
Unlocking
Emergency unlocking ....................... 81
From inside the vehicle (central
unlocking button) ............................ .8 0
Upshift indicator (on-board com-
puter, Mercedes-AMG vehicles) ...... .2 41 USB devices
Connecting to the Media Inter-
face ............................................... 292
V Vanity mirror (in the sun visor) ....... .3 04
Vehicle
Correct use ...................................... 29
Data acquisition ............................... 30
Display message ............................ 270
Equipment ....................................... 26
Individual settings .......................... 238
Limited Warranty ............................ .3 0
Loading .......................................... 356
Locking (in an emergency) ............... 81
Locking (SmartKey) .......................... 74
Lowering ........................................ 370
Maintenance .................................... 27
Operating safety .............................. 28
Parking .......................................... 159
Parking for a long period ................ 162
Pulling away ................................... 141
Raising ........................................... 368
Reporting problems ......................... 29
Securing from rolling away ............ 367
Towing away .................................. 341
Transporting .................................. 343
Unlocking (in an emergency) ........... 81
Unlocking (SmartKey) ...................... 74
Vehicle data ................................... 384
Vehicle battery
see Battery (vehicle)
Vehicle data ....................................... 384
Vehicle data (off-road driving)
Approach/departure angle ............ 386
Fording depth ................................ 385
Maximum gradient climbing abil-
ity .................................................. 386
Vehicle dimensions ........................... 384
Vehicle emergency locking ................ 81
Vehicle identification number
see VIN
Vehicle identification plate .............. 377
Vehicle level
AIRMATIC ...................................... 188
Vehicle level (display message) ....... 261
Vehicle tool kit .................................. 331Index 23

R
vehicles with the memory function: the front-
passenger seat is adjusted if it is in an unfav-
orable position. R
vehicles with a multicontour seat: the air pres-
sure in the side bolsters of the seat backrest
is increased.
If the hazardous situation passes without result-
ing in an accident, PRE-SAFE ®
slackens the belt
pre-tensioning. On vehicles with multicontour
seats, the air pressure in the side bolsters is
reduced again. All settings made by PRE-SAFE ®
can then be reversed.
If the seat belt pre-tensioning is not reduced: X
Move the seat backrest or seat back slightly
when the vehicle is stationary.
The seat belt pre-tensioning is reduced and
the locking mechanism is released.
The seat-belt adjustment is an integral part of
the PRE-SAFE ®
convenience function. Informa-
tion about the convenience function can be
found under "Belt adjustment" ( Y
page 45).
PRE-SAFE ®
PLUS (anticipatory occu-
pant protection system PLUS)
Introduction PRE-SAFE ®
PLUS is only available in vehicles
with the Driving Assistance package.
Using the radar sensor system, PRE-SAFE ®
PLUS is able to detect that a head-on or rear-end
collision is imminent. In certain hazardous sit-
uations, PRE-SAFE ®
PLUS takes pre-emptive
measures to protect the vehicle occupants.
Important safety notes The intervention of PRE-SAFE ®
PLUS cannot
prevent an imminent collision.
The driver is not warned about the intervention
of PRE-SAFE ®
PLUS.
PRE-SAFE ®
PLUS does not intervene if the vehi-
cle is backing up.
When driving, or when parking or exiting a park-
ing space with assistance from Parking Pilot,
PRE-SAFE ®
PLUS will not apply the brakes. Function PRE-SAFE ®
PLUS intervenes in certain situa-
tions if the radar sensor system detects an
imminent head-on or rear-end collision.
PRE-SAFE ®
PLUS takes the following measures
depending on the hazardous situation detected: R
if the radar sensor system detects that a
head-on collision is imminent, the seat belts
are pre-tensioned. R
if the radar sensor system detects that a rear-
end collision is imminent: -
the brake pressure is increased if the driver
applies the brakes when the vehicle is sta-
tionary. -
the seat belts are pre-tensioned.
The PRE-SAFE ®
PLUS braking application is can-
celed: R
if the accelerator pedal is depressed when a
gear is engaged R
if the risk of a collision passes or is no longer
detected R
if Distance Pilot DISTRONIC indicates an
intention to pull away
If the hazardous situation passes without result-
ing in an accident, the original settings are
restored.
Automatic measures after an acci-
dent Immediately after an accident, the following
measures are implemented, depending on the
type and severity of the impact: R
the hazard warning lamps are activated R
the emergency lighting is activated R
the vehicle doors are unlocked R
the front side windows are lowered R
vehicles with a memory function: the electri-
cally adjustable steering wheel is raised R
the engine is switched off and the fuel supply
is cut off R
vehicles with mbrace: automatic emergency
call56
Occupant safety
Safety

Off-road ABS An ABS system specifically suited to off-road
terrain is activated automatically once the off-
road program is activated on: R
Vehicles without the Offroad Engineering
package ( Y
page 217)R
Vehicles with the Off-Road Engineering pack-
age ( Y
page 218)
At speeds below 20 mph (30 km/h), the front
wheels lock cyclically during braking. The dig-
ging-in effect achieved in the process reduces
the stopping distance on off-road terrain. This
limits steering capability.
BAS (Brake Assist System)
General information BAS operates in emergency braking situations.
If you depress the brake pedal quickly, BAS
automatically boosts the braking force, thus
shortening the stopping distance.
Important safety notes
i Observe the "Important safety notes" sec-
tion ( Y
page 63).
G WARNING
If BAS is malfunctioning, the braking distance
in an emergency braking situation is
increased. There is a risk of an accident.
In an emergency braking situation, depress
the brake pedal with full force. ABS prevents
the wheels from locking.
Braking X
Keep the brake pedal firmly depressed until
the emergency braking situation is over.
ABS prevents the wheels from locking.
The brakes will function as usual once you
release the brake pedal. BAS is deactivated. Active Brake Assist
General information
i Observe the "Important safety notes" sec-
tion ( Y
page 63).
Active Brake Assist consists of a distance warn-
ing function with an autonomous braking func-
tion and Adaptive Brake Assist.
Active Brake Assist can help you to minimize the
risk of a collision with the vehicle traveling in
front or reduce the effects of such a collision.
If Active Brake Assist detects that there is a risk
of collision, you will be warned visually and
acoustically. If you do not react to the visual and
audible collision warning, autonomous braking
can be initiated in critical situations. If you apply
the brake yourself in a critical situation, Adap-
tive Brake Assist of the Active Brake Assist sys-
tem supports you.
Important safety notes In particular, the detection of obstacles can be
impaired if: R
there is dirt on the sensors or anything else
covering the sensors R
there is snow or heavy rain R
there is interference by other radar sources R
there are strong radar reflections, for exam-
ple in parking garages R
a narrow vehicle is traveling in front, e.g. a
motorbike R
a vehicle is traveling in front on a different line R
new vehicles or after servicing is carried out
on the Active Brake Assist system
Observe the notes in the section on breaking-
in ( Y
page 137).
Following damage to the front end of the vehicle,
have the configuration and operation of the
radar sensor checked at a qualified specialist
workshop. This also applies to collisions at slow
speeds where there is no visible damage to the
front of the vehicle.
Activating/deactivating
Active Brake Assist is automatically active after
switching on the ignition.
You can activate or deactivate Active Brake
Assist ( Y
page 237) in the on-board computer.
When deactivated, the distance warning func-64
Driving safety systems
Safety

Active Brake Assist with cross-traffic function
detects pedestrians using typical characteris-
tics such as body contours and the posture of a
person standing upright.
i Observe the restrictions described in the
"Important safety notes" section
( Y
page 70).
Important safety notes
G WARNING
Active Brake Assist with cross-traffic function
will initially brake your vehicle by a partial
application of the brakes if a danger of colli-
sion is detected. There may be a collision
unless you brake yourself. Even after subse-
quent full application of the brakes a collision
cannot always be avoided, particularly when
approaching at too high a speed. There is a
risk of an accident.
Always apply the brakes yourself and try to
take evasive action, provided it is safe to do
so.
In the event of a partial application of the brakes,
the vehicle is braked with up to 50% of the full
braking pressure.
G WARNING
Active Brake Assist with cross-traffic function
cannot always clearly identify objects and
complex traffic situations.
In such cases, Active Brake Assist with cross-
traffic function might: R
issue an unnecessary warning or engage R
neither give a warning nor intervene
There is a risk of an accident.
Always pay particular attention to the traffic
situation and be prepared to brake, especially
if Active Brake Assist with cross-traffic func-
tion alerts you. Terminate the intervention in a
non-critical driving situation.
G WARNING
Active Brake Assist with cross-traffic function
cannot always clearly identify people, partic-
ularly if they are moving. Active Brake Assist with cross-traffic function cannot intervene in
these cases. There is a risk of an accident.
Always pay particular attention to the traffic
situation and be prepared to brake, especially
if Active Brake Assist with cross-traffic func-
tion alerts you.
In order to maintain the appropriate distance to
the vehicle in front and thus prevent a collision,
you must apply the brakes yourself.
G WARNING
Active Brake Assist with cross-traffic function
does not react: R
to small people, e.g. children R
to animals R
to oncoming vehicles R
when cornering
As a result, Active Brake Assist with cross-
traffic function may not warn you or engage in
all critical situations. There is a risk of an acci-
dent.
Always pay careful attention to the traffic sit-
uation and be ready to brake.
In the event of snowfall or heavy rain, the rec-
ognition can be impaired.
Recognition by the radar sensor system is also
impaired if: R
there is dirt on the sensors or anything else
covering the sensors R
there is interference by other radar sources R
there are strong radar reflections, for exam-
ple in parking garages R
a narrow vehicle is traveling in front, e.g. a
motorbike R
a vehicle is traveling in front on a different line
relative to the center of your vehicle R
vehicles quickly move into the radar sensor
system detection range
Recognition by the camera system is also
impaired in the event of: R
dirt on the camera or if the camera is covered R
glare on the camera system, e.g. from the sun
being low in the sky70
Driving safety systems
Safety

Up to a speed of approximately 44 mph
(70 km/h) the Active Brake Assist with cross-
traffic function assists you with braking in haz-
ardous situations with: R
stationary obstacles in the path of the vehicle,
e.g. stopped or parked vehicles R
stationary pedestrians in the path of the vehi-
cle R
obstacles crossing your path that move in the
detection range of the sensors and are detec-
ted X
Keep the brake pedal depressed until the
emergency braking situation is over.
ABS prevents the wheels from locking.
You can prevent the intervention of Active Brake
Assist with cross-traffic function at any time by: R
depressing the accelerator pedal further R
activating kickdown R
releasing the brake pedal
The braking application of Active Brake Assist
with cross-traffic function is ended automati-
cally if: R
you maneuver to avoid the obstacle R
there is no longer a risk of collision R
there is no longer an obstacle detected in
front of your vehicle
STEER CONTROL
General information STEER CONTROL helps you by transmitting a
noticeable steering force to the steering wheel
in the direction required for vehicle stabilization.
This steering assistance is provided in particular
if: R
both right wheels or both left wheels are on a
wet or slippery road surface when you brake R
the vehicle starts to skid
Important safety notes
i Observe the "Important safety notes" sec-
tion ( Y
page 63). No steering assistance is provided from STEER
CONTROL, if: R
ESP ®
is deactivated R
ESP ®
is malfunctioning R
the steering is malfunctioning
If ESP ®
is malfunctioning, you will be assisted
further by the electrical power steering.
Protection against theft
Immobilizer X
To activate with the SmartKey: remove the
SmartKey from the ignition lock. X
To activate with KEYLESS-GO: switch the
ignition off and open the driver's door. X
To deactivate: switch on the ignition.
The immobilizer prevents your vehicle from
being started without the correct SmartKey.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Anyone
can start the engine if a valid SmartKey has been
left inside the vehicle.
i The immobilizer is always deactivated when
you start the engine.
In the event that the engine cannot be started
(yet the vehicle's battery is charged), the sys-
tem is not operational. Contact an authorized
Mercedes-Benz Center or call
1-800-FOR-MERCedes (in the USA) or
1-800-387-0100 (in Canada).
ATA (anti-theft alarm system)72
Protection against theft
Safety

G WARNING
Limbs could be crushed or trapped if the
engine is started unintentionally during ser-
vice or maintenance work. There is a risk of
injury.
Always secure the engine against uninten-
tional starting before carrying out mainte-
nance or repair work.
Make sure that the engine cannot be started via
your smartphone before carrying out mainte-
nance or repairs. You can prevent an engine
start via your smartphone, for example, if you: R
switch on the hazard warning lamps R
do not lock the doors R
open the hood
Pulling away
General notes
G WARNING
If the engine speed is above the idling speed
and you engage transmission position D or R ,
the vehicle could pull away suddenly. There is
a risk of an accident.
When engaging transmission position D or R ,
always firmly depress the brake pedal and do
not simultaneously accelerate.
Depress the accelerator carefully when pulling
away.
The vehicle locks centrally once you have pulled
away. The locking knobs in the doors drop down.
You can open the doors from the inside at any
time.
You can also deactivate the automatic locking
feature ( Y
page 239).
It is only possible to shift the transmission from
position P to the desired position if you depress
the brake pedal. Only then is the parking lock
released. If you do not depress the brake pedal,
the DIRECT SELECT lever can still be moved but
the parking lock remains engaged.
i Upshifts take place at higher engine speeds
after a cold start. This helps the catalytic con-
verter to reach its operating temperature
more quickly. Information on the automatic release of the
electric parking brake ( Y
page 161).
Pulling away with a trailer
To ensure that you do not roll backwards when
pulling away on an uphill slope, engage the elec-
tric parking brake. X
Press and hold handle C .
The electric parking brake continues to brake
and prevent the vehicle from rolling back-
wards.
The red I (USA only) or $ (Canada
only) indicator lamp in the instrument cluster
remains on. X
Depress the accelerator pedal. X
As soon as the vehicle/trailer combination is
held by the driving force of the engine, release
lever C .
the electric parking brake is released.
The red I (USA only) or $ (Canada
only) indicator lamp in the instrument cluster
goes out.
Hill start assist Hill start assist helps you when pulling away for-
wards or in reverse on an uphill gradient. It holds
the vehicle for a short time after you have
removed your foot from the brake pedal. This
gives you enough time to move your foot from
the brake pedal to the accelerator pedal and to
depress it before the vehicle begins to roll.
G WARNING
After a short time, hill start assist will no lon-
ger brake your vehicle and it could roll away.
There is a risk of an accident and injury.
Therefore, quickly move your foot from the
brake pedal to the accelerator pedal. Never Driving 141
Driving and parking Z

leave the vehicle when it is held by hill start
assist.
Hill start assist is not active if: R
you are pulling away on a level road or on a
downhill gradient. R
the transmission is in position N .R
the electric parking brake is applied. R
ESP ®
is malfunctioning.
ECO start/stop function
Introduction The ECO start/stop function switches the
engine off automatically if the vehicle is stopped
under certain conditions.
The engine starts automatically when the driver
wants to pull away again. The ECO start/stop
function thereby helps you to reduce the fuel
consumption and emissions of your vehicle.
Important safety notes
G WARNING
If the engine is switched off automatically and
you exit the vehicle, the engine is restarted
automatically. The vehicle may begin moving.
There is a risk of accident and injury.
If you wish to exit the vehicle, always turn off
the ignition and secure the vehicle against
rolling away.
General notes
C
ECO start/stop display
The ECO start/stop function is activated when-
ever you start the engine using the SmartKey or
the Start/Stop button.
If the engine has been switched off automati-
cally by the ECO start/stop function, the