2019 MERCEDES-BENZ GLS SUV brakes

Engaging reverse gear ................... 148
Engaging the park position ............ 148
Important safety note
s.................. 148
Kickdown ....................................... 151
Manual shifting .............................. 152
Oil temperature (on-board com-
puter, Mercedes-AMG vehicles) ..... 242
Overview ........................................ 148
Problem (malfunction) ................... 155
Pulling away ................................... 143
Starting the engine ........................ 142
Steering wheel paddle shifters ...... 152
Trailer towing ................................. 151
Transmission position display ........ 149
Transmission positions .................. 150
Automatic transmission emer-
gency mode ....................................... 155
AUX jacks
CD/DVD drive ............................... 294
Axle load, permissible (trailer tow-
ing) ...................................................... 392 B
Back button ....................................... 288
Bag hook ............................................ 300
Ball coupling
Installing ........................................ 223
Removing ....................................... 226
BAS (Brake Assist System) ................. 67
Battery (SmartKey)
Checking .......................................... 80
Important safety notes .................... 80
Replacing ......................................... 80
Battery (vehicle)
Charging ........................................ 342
Display message ............................ 259
Important safety notes .................. 340
Jump starting ................................. 343
Overview ........................................ 340
Replacing ....................................... 343
Belt
see Seat belts
Belt warning ......................................... 48
Bicycle rack ....................................... 227
Blind Spot Assist
Activating/deactivating ................. 239
Display message ............................ 265 Notes/function .............................. 207
Trailer towing ................................. 208
see Active Blind Spot Assist
Bluetooth ®
Searching for a mobile phone ........ 291
Searching for a mobile phone
(device manager) ........................... 292
see also Digital Operator's Man-
ual .................................................. 287
Telephony ...................................... 291
Brake Assist System
see BAS (Brake Assist System)
Brake fluid
Display message ............................ 251
Notes ............................................. 387
Brake force distribution
see EBD (electronic brake force
distribution)
Brake lamps
Display message ............................ 257
Brake linings
Display message ............................ 251
Brakes
ABS .................................................. 66
BAS .................................................. 67
Brake fluid (notes) ......................... 387
Braking assistance appropriate to
the situation ..................................... 69
Display message ............................ 246
High-performance brake system .... 164
Hill start assist ............................... 143
Important safety notes .................. 163
Maintenance .................................. 164
Parking brake ................................ 159
Riding tips ...................................... 163
Warning lamp ................................. 276
Braking assistance appropriate to
the situation
Function/note s................................ 69
Breakdown assistance
Where will I find...? ........................ 334
see Flat tire
see Towing away
Brightness control (instrument
cluster lighting) ................................... 37
Bulbs
see Replacing bulbs 6
Index

Active Distance Assist
DISTRONIC with Active Steering
Assist ............................................. 179
AIRMATIC package ........................ 185
Parking assist PARKTRONIC .......... 189
Driving systems
360°camera .................................. 200
Active Blind Spot Assist ................. 210
Active Curve System ...................... 186
Active Lane Keeping Assist ............ 212
Active Parking Assist ..................... 192
ADS ............................................... 185
AMG adaptive sport suspension
system ........................................... 188
ATTENTION ASSIST ........................ 204
Blind Spot Assist ............................ 207
Cruise control ................................ 171
Display message ............................ 261
Driving Assistance Plus package ... 210
HOLD functio n............................... 183
Lane Keeping Assist ...................... 208
Level control (vehicle with the Off-
Road Engineering package) ........... 180
Rear view camera .......................... 196
Traffic Sign Assist .......................... 206
Driving tips
Active Distance Assist
DISTRONIC .................................... 178
Automatic transmission ................. 150
Brakes ........................................... 163
Break-in period .............................. 139
Downhill gradient ........................... 163
Drinking and driving ....................... 161
Driving in winter ............................. 165
Driving on flooded roads ................ 165
Driving on sand .............................. 169
Driving on wet roads ...................... 165
Driving over obstacles ................... 169
Exhaust check ............................... 161
Fuel ................................................ 161
General .......................................... 161
Hydroplaning ................................. 165
Icy road surfaces ........................... 165
Limited braking efficiency on sal-
ted roads ....................................... 164
Off-road driving .............................. 167
Off-road fording ............................. 165
Snow chains .................................. 354 The first 1000 miles (1500 km) ..... 139
Tire ruts ......................................... 169
Towing a trailer .............................. 222
Traveling uphill ............................... 169
Wet road surface ........................... 163
DSR (Downhill Speed Regulation)
Display message ............................ 264
Function/note s............................. 215
DVD video
Operating (on-board computer) ..... 236
see also Digital Operator's Man-
ual .................................................. 287
DYNAMIC SELECT controller
Automatic transmission ................. 147 E
EASY-ENTRY feature Activating/deactivating ................. 241
Function/note s............................. 109
EASY-EXIT feature
Crash-responsive ........................... 110
Function/note s............................. 109
Switching on/of f........................... 241
EBD (electronic brake force distri-
bution)
Display message ............................ 248
Function/note s................................ 72
ECO display
Function/note s............................. 162
On-board computer ....................... 234
ECO start/stop function
Automatic engine start .................. 145
Automatic engine switch-off .......... 144
Deactivating/activating ................. 145
General information ....................... 144
Important safety notes .................. 144
Introduction ................................... 144
Electronic Stability Program
see ESP ®
(Electronic Stability Program)
Emergency
Automatic measures after an acci-
dent ................................................. 59
Emergency release
Driver's doo r.................................... 84
Vehicle ............................................. 84
Emergency spare wheel
General notes ................................ 378 10
Index

Towing away ..................................3
46
Transporting .................................. 348
Unlocking (in an emergency) ........... 84
Unlocking (SmartKey) ..................... .77
Vehicle data ................................... 389
Vehicle battery
see Battery (vehicle)
Vehicle data ....................................... 389
Vehicle data (off-road driving)
Approach/departure angle ............ 391
Maximum gradient climbing abil-
ity .................................................. 392
Maximum water depth ................... 390
Vehicle dimensions ........................... 389
Vehicle emergency locking ................ 84
Vehicle identification number
see VIN
Vehicle identification plate .............. 383
Vehicle level
AIRMATIC ...................................... 187
Vehicle level (display message) ....... 261
Vehicle tool kit .................................. 335
Video
Operating the DVD .........................2 36
see also Digital Operator's Man-
ual ................................................. .287
VIN ...................................................... 383
Seat ............................................... 384
Type plate ...................................... 383 W
Warning and indicator lamps ABS ................................................ 277
Brakes .......................................... .276
Coolant .......................................... 283
Distance warning ........................... 285
Engine diagnostics ......................... 282
ESP ®
.............................................. 279
ESP ®
OFF ....................................... 280
Fuel tank ........................................ 282
Overview .......................................... 37
Parking brake ................................ 282
PASSENGER AIR BAG ..................... .45
Reserve fuel .................................. .282
Restraint system ............................ 282
Seat belt ........................................ 275
Tire pressure monitor .................... 286 Warranty
.............................................. 28
Washer fluid
Display message ............................ 273
Weather display (COMAND)
see also Digital Operator's Man-
ual.................................................. 287
Wheel and tire combinations
Tires ............................................... 377
Wheel bolt tightening torque ........... 377
Wheel chock ...................................... 374
Wheels
Changing a whee l.......................... 372
Checking ........................................ 352
Cleaning ......................................... 329
Emergency spare wheel ................. 378
Important safety notes .................. 352
Information on driving .................... 352
Interchanging/changing ................ 372
Mounting a new whee l................... 376
Mounting a whee l.......................... 373
Overview ........................................ 352
Removing a whee l.......................... 375
Snow chains .................................. 354
Storing ........................................... 373
Tightening torque ........................... 377
Wheel size/tire size ....................... 377
Window curtain air bag
Display message ............................ 254
Operation ......................................... 51
Windows
see Side windows
Windshield
Defrosting ...................................... 133
Infrared reflective .......................... 320
Windshield washer fluid
see Windshield washer system
Windshield washer system
Adding washer fluid ....................... 324
Important safety notes .................. 388
Windshield wipers
Problem (malfunction) ................... 124
Rear window wipe r........................ 123
Replacing the wiper blades ............ 123
Switching on/of f........................... 122
Winter driving
Slippery road surfaces ................... 165
Winter operation
Overview ........................................ 354 24
Index

nance requirements as well as technical events
and malfunctions.
This information generally documents the con-
dition of a component, a module, a system or the
surroundings, such as:
R Operating states of system components (e.g.
fill levels, battery status, tire pressure)
R Status messages concerning the vehicle or its
individual components (e.g. wheel rpm/
speed, deceleration, lateral acceleration, indi- cation of whether seat belts are fastened)
R Malfunctions and defects in important system
components (e.g. lights, brakes)
R Information about events leading to vehicle
damage
R System responses in special driving situa-
tions (e.g. air bag deployment, intervention of
stability control systems)
R Ambient conditions (e.g. temperature, rain
sensor)
In addition to performing the actual control unit
function, this data is used by manufacturers to
detect and rectify malfunctions and to optimize vehicle functions. Most of this data is volatile
and processed only in the vehicle itself. Only a
small part of the data is stored in event or mal-
function memories.
When you use services, the technical data from
the vehicle can be read out by service network
employees (e.g. workshops, manufacturers) or
third parties (e.g. breakdown services). Services
can include repair services, maintenance pro-
cesses, warranty cases and quality assurance
measures. The data are read out via the con-
nection for the diagnostics connection in the
vehicle, which is required by law. The relevant
offices in the service network or third parties
collect, process and use the data. This data
documents the vehicle's technical states, is
used to help in finding malfunctions and improv-
ing quality and is sent to the manufacturer
where necessary. In addition, the manufacturer is subject to product liability. The manufacturerneeds technical data from vehicles for this pur-
pose.
Malfunction memories in the vehicle can be
reset by a service center during repair or service
work.
You can incorporate data into the vehicle's com- fort and infotainment functions yourself as part
of the selected equipment. These include, for example:
R Multimedia data such as music, films or pho-
tos for playback in an integrated multimedia
system
R Address book data for use in conjunction with
an integrated hands-free system or an inte-
grated navigation system
R Navigation destinations that have been
entered
R Data about using Internet services
This data can be saved locally in the vehicle or
located on a device that you have connected to
the vehicle (e.g. smartphone, USB memory stick or MP3 player). If this data is saved in the vehi-
cle, you can delete it at any time. This data is
sent to third parties only at your request, par-
ticularly when you use online services in accord- ance with the settings that you have selected.
You can save and change comfort settings/
customizations in the vehicle at any time.
Depending on the equipment in question, these can include:
R Seat and steering wheel position settings
R Suspension and climate control settings
R Custom settings such as interior lighting
If your vehicle is equipped appropriately, you
can connect your smartphone or another mobile end device to the vehicle. You can control this by
means of the control elements integrated in the vehicle. The smartphone's picture and sound
can be output via the multimedia system. Spe-
cific items of information are also sent to your
smartphone.
Depending on the type of integration, this can
include:
R General vehicle information
R Position data
This allows the use of selected smartphone
apps, such as navigation or music player apps.
There is no additional interaction between the
smartphone and the vehicle, particularly active
access to vehicle data. The type of additional
data processing is determined by the provider of the app being used. Whether you can configure
settings for it and, if so, which ones, depends on
the app and your smartphone's operating sys-
tem. Data stored in the vehicle
33Introduction Z

Instrument cluster
Function Page
0043
Speedometer with segments 230
Warning and indicator lamps:
00BB
ESP®
OFF 279
0025
ABS 277
Brakes 276
0027
(USA only) 004D
(Canada only) 0058
Low-beam headlamps 116
0060
Parking lamps 116
00E5
ESP® 279
0057
High-beam headlamps 116
Electric parking brake (red) 282
0049
(USA only) 0024
(Canada only) 0024
Electric parking brake
(yellow) 282
00BA
Distance warning 285
0044
003E003D
Turn signals 116 Function Page
0087
Multifunction display 232
0085
Tachometer 230
Warning and indicator lamps:
005E
Rear fog lamp 116
00B9
Check Engine 282
0077
Tire pressure monitor 286
0075
Restraint system 45
00E9
Seat belts 275
0083
Coolant temperature gauge 231
Warning and indicator lamps:
00AC
Coolant 283
0084
Fuel level indicator
Warning and indicator lamps:
00B6
Reserve fuel with fuel
filler flap location indicator
(right-hand side) 282
006B
Instrument cluster lighting 230
i
Information on displaying the outside tem-
perature in the multifunction display can be found under "Outside temperature display"
(Y
page 230). Instrument cluster
37At a glance

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 48).PRE-SAFE
®
PLUS (anticipatory occu-
pant protection system PLUS)
Introduction PRE-SAFE
®
PLUS is only available in vehicles
with the Driving Assistance PLUS 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 using Active Parking Assist, 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 Active Distance Assist DISTRONIC indicates
an intention to intervene
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 switched on
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 when
the driver's door is opened
R the engine is switched off and the fuel supply
is cut off
R vehicles with Mercedes me connect: auto-
matic emergency call Children in the vehicle
Important safety notes
Accident statistics show that children secured
in the rear seats are safer than children secured
in the front-passenger seat. For this reason,
Mercedes-Benz strongly advises that you install Children in the vehicle
59Safety Z

Never leave animals unattended in the vehi-
cle.
Always secure animals properly when driving, for instance with a suitable pet carrier. Driving safety systems
Overview of driving safety systems
In this section, you will find information about
the following driving safety systems:
R ABS (Anti-lock BrakingSystem)
(Y page 66)
R BAS ( Brake Assist System) (Y page 67)
R Active Brake Assist (Y page 67)
R ESP ®
(Electronic StabilityProgram)
(Y page 70)
R EBD ( Electronic Brake force Distribution)
(Y page 72)
R ADAPTIVE BRAKE (Y page 72)
R Active Brake Assist with cross-traffic function
(Y page 72)
R Active Steering Assist STEER CONTROL
(Y page 75) Important safety notes
If you fail to adapt your driving style or if you are
inattentive, the driving safety systems can nei-
ther reduce the risk of an accident nor override the laws of physics. Driving safety systems are
merely aids designed to assist driving. You are
responsible for maintaining the distance to the
vehicle in front, for vehicle speed, for braking in
good time, and for staying in lane. Always adapt your driving style to suit the prevailing road and
weather conditions and maintain a safe distance from the vehicle in front. Drive carefully.
The driving safety systems described only work
as effectively as possible when there is ade-
quate contact between the tires and the road
surface. Pay particular attention to the informa- tion regarding tires, recommended minimum
tire tread depths etc. in the "Wheels and tires"
section (Y page 352).
In wintry driving conditions, always use winter
tires (M+S tires) and if necessary, snow chains.
Only in this way will the driving safety systems
described in this section work as effectively as
possible. ABS (Anti-lock Braking System)
General information ABS regulates brake pressure in such a way that
the wheels do not lock when you brake. This
allows you to continue steering the vehicle when braking.
The 0025 ABS warning lamp in the instrument
cluster lights up when the ignition is switched
on. It goes out when the engine is running.
ABS works from a speed of about 5 mph
(8 km/h), regardless of road-surface conditions.
ABS works on slippery surfaces, even when you only brake gently.
Important safety notes i
Observe the "Important safety notes" sec-
tion (Y page 66). G
WARNING
If ABS is faulty, the wheels could lock when
braking. The steerability and braking charac-
teristics may be severely impaired. Addition-
ally, further driving safety systems are deac-
tivated. There is an increased danger of skid- ding and accidents.
Drive on carefully. Have ABS checked imme-
diately at a qualified specialist workshop.
When ABS is malfunctioning, other systems,
including driving safety systems, will also
become inoperative. Observe the information
on the ABS warning lamp (Y page 277) and dis-
play messages which may be shown in the
instrument cluster (Y page 246).
Brakes X
If ABS intervenes: continue to depress the
brake pedal vigorously until the braking sit-
uation is over.
X To make a full brake application: depress
the brake pedal with full force.
If ABS intervenes when braking, you will feel a
pulsing in the brake pedal.
The pulsating brake pedal can be an indication
of hazardous road conditions, and functions as a
reminder to take extra care while driving. 66
Driving safety systemsSafety

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 216)
R Vehicles with the Off-Road Engineering pack-
age (Y page 217)
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 66). 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 66).
Active Brake Assist consists of a distance warn-
ing function with an autonomous braking func-
tion and situation-dependent braking assis-
tance.
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, Active
Brake Assist supports you with situation-
dependent braking assistance.
Active Brake Assist is only available in certain
countries.
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 you are driving a new vehicle or servicing on
the Active Brake Assist system has just been
carried out
Observe the notes in the section on breaking-
in (Y page 139).
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. Driving safety systems
67Safety Z