2017 MERCEDES-BENZ GLS trailer

Fuel filler flap
Opening ........................................ .1 55
Fuel filter (display message) ............ 260
Fuel level
Calling up the range (on-board
computer) ...................................... 233
Fuel tank
Capacity ........................................ 379
Problem (malfunction) ................... 156
Fuses
Allocation chart ............................ .3 43
Before changing ............................ .3 44
Dashboard fuse box ....................... 344
Fuse box in the engine compart-
ment .............................................. 344
Fuse box under rear bench seat .... 345
Important safety notes .................. 343
GGarage door opener
Clearing the memory ..................... 318
General notes ................................ 315
Important safety notes .................. 315
Opening/closing the garage doo r. .3 17
Problems when programming ....... .3 17
Programming (button in the rear-
view mirror) ................................... 316
Synchronizing the rolling code ....... 316
Gear indicator (on-board com-
puter, Mercedes-AMG vehicles) ....... 241
Genuine parts ...................................... 25
Glove box .......................................... .2 95
Google™ Local Search
see also Digital Operator's Man-
ual ................................................. .2 87
GTW (Gross Trailer Weight) (defini-
tion) .................................................... 365
H
Handbrake
see Parking brake
Hazard warning lamps ..................... .1 14
Head restraints
Adjusting ......................................... 96
Adjusting (electrically) ..................... 97
Adjusting (manually) ........................ 96 Adjusting (rear) ................................ 97
Installing/removing (rear) ................ 98
Luxury .............................................. 97
Headlamps
Fogging up ..................................... 116
see Automatic headlamp mode
Heating
see Climate control
High beam flasher ............................ .1 13
High-beam headlamps
Adaptive Highbeam Assist ............. 115
Display message ............................ 256
Replacing bulbs ............................ .1 19
Switching on/off ........................... 113
Highway mode ................................... 114
Hill start assist .................................. 141
HOLD function
Deactivating ................................... 185
Display message ............................ 264
Function/notes ............................ .1 85
Home address
see also Digital Operator's Man-
ual ................................................. .2 87
Hood
Closing .......................................... .3 20
Display message ............................ 272
Important safety notes .................. 319
Opening ......................................... 319
Horn ...................................................... 33
Hydroplaning ..................................... 166
I
Ignition lock
see Key positions
Immobilizer .......................................... 72
Indicator lamps
see Warning and indicator lamps
Indicators
see Turn signals
Insect protection on the radiator .... 320
Instrument cluster
Overview .......................................... 34
Warning and indicator lamps ........... 34
Instrument cluster lighting .............. 229
Intelligent Light System
Activating/deactivating ................. 239
Overview ........................................ 11412
Index

Off-road ESP ®
................................. .6 8
Off-road programs (vehicles with
Off-Road Engineering package) ...... 218
Oil
see Engine oil
On and Offroad menu (on-board
computer) .......................................... 241
On-board computer
AMG menu .................................... .2 41
Assistance menu ........................... 236
Audio menu ................................... 234
Convenience submenu .................. 240
Display messages .......................... 243
Displaying a service message ....... .3 23
Distance Pilot DISTRONIC ............. 179
Factory settings submenu ............. 240
Important safety notes .................. 229
Instrument cluster submenu .......... 238
Lighting submenu .......................... 239
Menu overview .............................. 232
Message memory .......................... 244
Navigation menu ............................ 233
On and Offroad menu .................... 241
Operation ....................................... 230
RACETIMER ................................... 241
Settings menu ............................... 238
Standard display ............................ 232
Telephone menu ............................ 235
Trip menu ...................................... 232
Vehicle submenu ........................... 239
Video DVD operation ..................... 235
Operating safety
Declaration of conformity ................ 28
Important safety notes .................... 28
Operating system
see On-board computer
Operator's Manual
Overview .......................................... 26
Vehicle equipment ........................... 26
Outside temperature display ........... 229
Overhead control panel ...................... 39
Override feature
Rear side windows ........................... 62
P
Paddle shifters
see Steering wheel paddle shifters Paint code number ............................ 377
Paintwork (cleaning instructions) ... 326
Panic alarm .......................................... 41
Panorama roof with power tilt/
sliding panel
Important safety notes .................... 89
Opening/closing the roller sun-
blind ................................................. 92
Operating ......................................... 91
Operating the roller sunblinds for
the sliding sunroof ........................... 91
Problem (malfunction) ..................... 92
Reversing feature ............................. 90
Parking
Important safety notes .................. 159
Parking brake ................................ 160
Position of exterior mirror, front-
passenger side ............................... 109
Rear view camera .......................... 197
see PARKTRONIC
Parking aid
Parking Pilot .................................. 193
see 360° camera
see Exterior mirrors
see PARKTRONIC
Parking Assist PARKTRONIC
Deactivating/activating ................. 192
Driving system ............................... 190
Function/notes ............................. 190
Important safety notes .................. 190
Problems (malfunctions) ................ 193
Sensor range ................................. 191
Towing a trailer .............................. 190
Warning display ............................. 192
Parking brake
Applying automatically ................... 161
Applying or releasing manually ...... 161
Display message ............................ 247
Electric parking brake .................... 160
Emergency braking ........................ 162
General notes ................................ 160
Releasing automatically ................. 161
Warning lamp ................................. 282
Parking lamps
Switching on/off ........................... 113
Parking Pilot
Display Message ............................ 265
Exiting a parking space .................. 19616
Index

Function/notes ............................. 193
Important safety notes .................. 193
Parking .......................................... 195
PASSENGER AIR BAG
Display message ............................ 254
Indicator lamps ................................ 42
Problem (malfunction) ................... 254
Pets in the vehicle ............................... 62
Phone book
see also Digital Operator's Man-
ual .................................................. 287
Plastic trim (cleaning instruc-
tions) .................................................. 329
Power locks ......................................... 81
Power washers .................................. 325
Power windows
see Side windows
PRE-SAFE ®
(anticipatory occupant
protection)
Display message ............................ 251
Operation ......................................... 55
PRE-SAFE ®
PLUS (anticipatory
occupant protection PLUS)
Display message ............................ 251
Operation ......................................... 56
Protection against theft
ATA (Anti-Theft Alarm system) ......... 72
Immobilizer ...................................... 72
Protection of the environment
General notes .................................. 25
Pulling away
Automatic transmission ................. 141
General notes ................................ 141
Hill start assist ............................... 141
Trailer ............................................ 141
Q
QR code
Mercedes-Benz Guide App ................. 1
Rescue card ..................................... 30
Qualified specialist workshop ........... 29
R
RACETIMER (on-board computer) .... 241
Radiator cover ................................... 320 Radio
Selecting a station ......................... 234
see separate operating instructions
Radio mode
see also Digital Operator's Man-
ual .................................................. 287
Radio-wave reception/transmis-
sion in the vehicle
Declaration of conformity ................ 28
Reading lamp ..................................... 116
Rear bench seat
Folding forwards/back .................. 298
Rear compartment
Exit/entry position (3rd row of
seats) ............................................. 100
Setting the air vents ...................... 135
Setting the temperature ................ 131
Rear fog lamp
Display message ............................ 256
Switching on/off ........................... 113
Rear Seat Entertainment System
AUX jacks ...................................... 293
AUX jacks CD/DVD drive .............. 293
Rear seats
Adjusting ......................................... 98
Display message ............................ 272
Rear view camera
Cleaning instructions ..................... 328
Display in the multimedia system .. 198
Function/notes ............................. 197
Switching on/off ........................... 198
Rear window defroster
Problem (malfunction) ................... 133
Switching on/off ........................... 133
Rear window wiper
Replacing the wiper blade .............. 121
Switching on/off ........................... 120
Rear-view mirror
Anti-glare (manual) ........................ 107
Dipping (automatic) ....................... 109
Refrigerant (air-conditioning sys-
tem)
Important safety notes .................. 383
Refueling
Fuel gauge ....................................... 34
Important safety notes .................. 153
Refueling process .......................... 154
see Fuel Index 17

Trailer loads ................................... 387
Vehicle data ................................... 384
Telephone
Accepting a call (multifunction
steering wheel) .............................. 236
Authorizing a mobile phone (con-
necting) ......................................... 291
Connecting a mobile phone (gen-
eral information) ........................... .2 90
Display message ............................ 272
Menu (on-board computer) ............ 235
Number from the phone book ....... .2 36
Redialing ........................................ 236
Rejecting/ending a call ................. 236
see also Digital Operator's Man-
ual ................................................. .2 87
Switching between mobile
phones .......................................... .2 92
Temperature
Coolant (display in the instrument
cluster) .......................................... 230
Coolant (on-board computer,
Mercedes-AMG vehicles) .............. .2 41
Engine oil (on-board computer,
Mercedes-AMG vehicles) .............. .2 41
Outside temperature ..................... .2 29
Setting (climate control) ................ 131
Transmission oil (on-board com-
puter, Mercedes-AMG vehicles) ..... 241
Through-loading feature ................... 297
Time
see separate operating instructions
Timing (RACETIMER) ......................... 241
Tire pressure
Calling up (on-board computer) ..... 353
Checking manually ........................ 352
Display message ............................ 268
Maximum ....................................... 352
Not reached (TIREFIT) .................... 334
Notes ............................................. 351
Reached (TIREFIT) .......................... 335
Recommended ............................... 349
Tire pressure loss warning system
General notes ................................ 352
Important safety notes .................. 352
Restarting ...................................... 353 Tire pressure monitor
Checking the tire pressure ele c-
tronica l ly ........................................ 355
Function/notes ............................ .3 53
General notes ................................ 353
Important safety notes .................. 354
Radio type approval for the tire
pressure monitor ........................... 356
Restarting ...................................... 355
Warning lamp ................................. 286
Warning message .......................... 355
TIREFIT kit
Important safety notes .................. 333
Storage location ............................ 331
Tire pressure not reached .............. 334
Tire pressure reached .................... 335
Using ............................................. 333
Tires
Aspect ratio (definition) ................. 365
Average weight of the vehicle
occupants (definition) .................... 364
Bar (definition) ............................... 364
Changing a wheel .......................... 366
Characteristics .............................. 364
Checking ........................................ 346
Curb weight (definition) ................. 365
Definition of terms ......................... 364
Direction of rotation ...................... 367
Display message ............................ 268
Distribution of the vehicle occu-
pants (definition) ............................ 366
DOT (Department of Transporta-
tion) (definition) ............................. 364
DOT, Tire Identification Number
(TIN) ............................................... 363
GAWR (Gross Axle Weight Rating)
(definition) ..................................... 364
GTW (Gross Trailer Weight) (defi-
nition) ............................................ 365
GVW (Gross Vehicle Weight) (def-
inition) ........................................... 365
GVWR (Gross Vehicle Weight Rat-
ing) (definition) .............................. 365
Important safety notes .................. 346
Increased vehicle weight due to
optional equipment (definition) ...... 364
Information on driving .................... 346
Kilopascal (kPa) (definition) ........... 365 Index 21

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

Trailer stabilization is active above speeds of
about 37 mph (60 km/ h) .
ESP ®
trailer stabilization does not work if ESP ®
is deactivated or disabled because of a malfunc-
tion.
Crosswind Assist General information Strong crosswind gusts can impair the ability of
your vehicle to drive straight ahead. The cross-
wind driving assistance function integrated in
ESP ®
noticeably reduces these impairments.
ESP ®
intervenes automatically according to the
direction and intensity of the crosswinds affect-
ing your vehicle.
ESP ®
intervenes with stabilizing braking to
assist you in keeping the vehicle in the lane.
Crosswind Assist is active at vehicle speeds
above 50 mph (80 km/h) when driving straight
ahead or cornering gently.
Important safety notes Crosswind Assist does not work if ESP ®
is
switched off or deactivated because of a mal-
function.
EBD (electronic brake force distribu-
tion)
General information EBD monitors and controls the brake pressure
on the rear wheels to improve driving stability
while braking.
Important safety notes
i Observe the "Important safety notes" sec-
tion for driving safety systems ( Y
page 63).
G WARNING
If EBD is malfunctioning, the rear wheels can
lock, e.g. under full braking. This increases the
risk of skidding and an accident.
You should therefore adapt your driving style
to the different handling characteristics. Have
the brake system checked at a qualified spe-
cialist workshop. Observe information regarding indicator and
warning lamps ( Y
page 277) as well as display
messages ( Y
page 247).
ADAPTIVE BRAKE ADAPTIVE BRAKE enhances braking safety and
offers increased braking comfort. In addition to
the braking function, ADAPTIVE BRAKE also has
the HOLD function ( Y
page 185) and hill start
assist ( Y
page 141).
Active Brake Assist with cross-traffic
function
General information
i Pay attention to the important safety notes
in the "Driving safety systems" section
( Y
page 63).
Active Brake Assist with cross-traffic function
can help you to minimize the risk of a collision
with a vehicle in front or a pedestrian and reduce
the effects of such a collision. If the Active Brake
Assist with cross-traffic function detects a risk
of collision, you will be warned visually and
acoustically and, if necessary, your brake appli-
cation will be assisted according to the situa-
tion. If you do not react, the system can also
react by braking automatically. In the event of a
detected risk of collision due to crossing traffic,
you will also be visually and acoustically warned
as well as assisted by the brake boosting effect
according to the situation.
Active Brake Assist with cross-traffic function is
only available in vehicles with the Driving Assis-
tance Plus package.
For Active Brake Assist with cross-traffic func-
tion to assist you when driving, the radar sensor
system and the camera system must be opera-
tional.
If the radar sensor system or the camera system
is malfunctioning, Active Brake Assist with
cross-traffic function is restricted or no longer
available. The brake system is still available with
co mplete brake boosting effect and BAS.
The radar sensor system and camera system
help Active Brake Assist with cross-traffic func-
tion to detect obstacles that are in the path of
your vehicle for an extended period of time.
In addition, pedestrians in the path of your vehi-
cle can be detected.Driving safet y system s 69
Safet y Z

The daytime running lamps improve the visibility
of your vehicle during the day. To do this, the
daytime running lamps function must be
switched on using the on-board computer
( Y
page 239).
If the engine is running and you turn the light
switch to ` or X , the manual settings
take precedence over the daytime running
lamps.
Low-beam headlamps Even if the light sensor does not detect that it is
dark, the parking lamps and low-beam head-
lamps switch on when the ignition is switched on
and the light switch is set to the X position.
This is a particularly useful function in the event
of rain and fog. X
To switch on the low-beam headlamps:
turn the SmartKey in the ignition lock to posi-
tion 2 or start the engine.X
Turn the light switch to X .
The green X indicator lamp in the instru-
ment cluster lights up.
Rear fog lamp The rear fog lamp improves visibility of your
vehicle for the traffic behind in the event of thick
fog. Please take note of the country-specific
regulations for the use of rear fog lamps. X
To switch on the rear fog lamp: turn the
SmartKey in the ignition lock to position 2 or
start the engine. X
Turn the light switch to X or q .X
Press the ^ button.
The yellow ^ indicator lamp in the instru-
ment cluster lights up. X
To switch off the rear fog lamp: press the
^ button.
The yellow ^ indicator lamp in the instru-
ment cluster goes out.
Parking lamps
! If the battery charge is very low, the parking
lamps or standing lamps are automatically
switched off to enable the next engine start.
Always park your vehicle safely and in a well lit
area, in accordance with the relevant legal
stipulations. Avoid using the ` parking
lamps over a period of several hours. If pos-
sible, switch on the right-hand d or left-
hand c standing lamps. X
To switch on: turn the light switch to ` .
The green ` indicator lamp in the instru-
ment cluster lights up.
Standing lamps Switching on the standing lamps ensures the
corresponding side of t he vehicle is illuminated.X
To switch on the standing lamps: the
SmartKey should not be in the ignition lock or
it should be in position 0 .X
Turn the light switch to c (left-hand side of
the vehicle) or d (right-hand side of the
vehicle).
Vehicles towing a trailer: both the right-hand
and left-hand standing lamps (tail lamps) are
always illuminated on the trailer.
Combination switch
C
High-beam headlamps D
Turn signal, right