2019 MERCEDES-BENZ GLS trailer

Tailgate
Display message ............................ 271
Emergency unlocking ....................... 88
Important safety notes .................... 84
Limiting the opening angle ............... 88
Opening dimensions ...................... 389
Opening/closing (automatically
from inside) ...................................... 87
Opening/closing (automatically
from outside) ................................... 86
Opening/closing (from outside) ....... 85
Power closing .................................. 84
Tank
see Fuel tank
Tank content
Fuel gaug e....................................... 37
Technical data
Capacities ...................................... 384
Drawbar load (maximum) ............... 392
Information .................................... 382
Tires/wheels ................................. 377
Trailer load s................................... 392
Vehicle data ................................... 389
Telephone
Accepting a call (multifunction
steering wheel) .............................. 237
Authorizing a mobile phone (con-
necting) ......................................... 291
Authorizing a mobile phone via the device manager (connecting) ......... 292
Connecting a mobile phone
(device manager )........................... 292
Connecting a mobile phone (gen-
eral information) ............................ 291
Display message ............................ 272
Menu (on-board computer) ............ 237
Number from the phone book ........ 237
Redialing ........................................ 237
Rejecting/ending a call ................. 237
see also Digital Operator's Man-
ua l.................................................. 287
Temperature
Coolant (display in the instrument
cluster) .......................................... 231
Coolant (on-board computer,
Mercedes-AMG vehicles) ............... 242
Engine oil (on-board computer,
Mercedes-AMG vehicles) ............... 242 Outside temperature ...................... 230
Setting (climate control
)................ 132
Transmission oil (on-board com-
puter, Mercedes-AMG vehicles) ..... 242
Through-loading feature ................... 298
Timing (RACETIMER) ......................... 243
Tire pressure
Calling up (on-board computer) ..... 359
Checking manually ........................ 358
Display message ............................ 268
Maximum ....................................... 358
Not reached (TIREFIT) .................... 339
Note s............................................. 357
Reached (TIREFIT) .......................... 339
Recommended ............................... 355
Tire pressure loss warning system
General notes ................................ 358
Important safety notes .................. 359
Restarting ...................................... 359
Tire pressure monitor
Checking the tire pressure elec-
tronically ........................................ 361
Function/note s............................. 359
General notes ................................ 359
Important safety notes .................. 360
Radio type approval for the tire
pressure monitor ........................... 362
Restarting ...................................... 362
Warning lamp ................................. 286
Warning message .......................... 361
Tire pressure table ............................ 356
TIREFIT kit
Important safety notes .................. 337
Storage location ............................ 335
Tire pressure not reached .............. 339
Tire pressure reached .................... 339
Using ............................................. 338
Tires
Aspect ratio (definition) ................. 372
Average weight of the vehicle
occupants (definition) .................... 370
Bar (definition) ............................... 370
Changing a whee l.......................... 372
Characteristics .............................. 370
Checking ........................................ 352
Curb weight (definition) ................. 371
Definition of terms ......................... 370
Direction of rotation ...................... 373 Index
21

Display message ............................ 268
Distribution of the vehicle occu-
pants (definition) ............................ 372
DOT (Department of Transporta-
tion) (definition) ............................. 370
DOT, Tire Identification Number
(TIN) ............................................... 370
GAWR (Gross Axle Weight Rating)
(definition) .................................... .371
GTW (Gross Trailer Weight) (defi-
nition) ............................................ 371
GVW (Gross Vehicle Weight) (def-
inition) .......................................... .371
GVWR (Gross Vehicle Weight Rat-
ing) (definition) .............................. 371
Important safety notes .................. 352
Increased vehicle weight due to
optional equipment (definition) ...... 371
Information on driving .................... 352
Kilopascal (kPa) (definition) ........... 371
Labeling (overview )........................ 367
Load bearing index (definition) ...... 372
Load index ..................................... 369
Load index (definition) ................... 371
M+S tire s....................................... 354
Maximum load on a tire (defini-
tion) ............................................... 371
Maximum loaded vehicle weight
(definition) ..................................... 371
Maximum permissible tire pres-
sure (definition) ............................. 371
Maximum tire load ......................... 369
Maximum tire load (definition) ....... 371
MOExtended tire s.......................... 353
Optional equipment weight (defi-
nition) ............................................ 372
PSI (pounds per square inch) (def-
inition) ........................................... 372
Replacing ....................................... 372
Service life ..................................... 353
Sidewall (definition) ....................... 372
Snow chains .................................. 354
Speed rating (definition) ................ 371
Storing ........................................... 373
Structure and characteristics
(definition) ..................................... 370
Summer tires in winter .................. 354
Temperature .................................. 366 TIN (Tire Identification Number)
(definition) ..................................... 372
Tire bead (definition) ...................... 372
Tire pressure (definition) ................ 372
Tire pressures (recommended) ...... 371
Tire size (data) ............................... 377
Tire size designation, load-bearing
capacity, speed rating .................... 367
Tire tread ....................................... 353
Tire tread (definition) ..................... 372
Total load limit (definition) ............. 372
Traction ......................................... 366
Traction (definition) ....................... 372
Tread wear ..................................... 366
TWR (permissible trailer drawbar
noseweight) (definition) ................. 372
Uniform Tire Quality Grading
Standards ...................................... 366
Uniform Tire Quality Grading
Standards (definition) .................... 370
Wear indicator (definition) ............. 372
Wheel and tire combination ........... 377
Wheel rim (definition) .................... 371
see Flat tire
Tool
see Vehicle tool kit
Top Tether ............................................ 63
Tow-starting
Emergency engine starting ............ 349
Important safety notes .................. 346
Towing
Permitted towing methods ............ 347
Towing a trailer
Axle load, permissibl e.................... 392
Cleaning the trailer tow hitch ......... 331
Coupling up a traile r...................... 224
Decoupling a trailer ....................... 226
Driving tip s.................................... 222
Important safety notes .................. 221
Installing the ball coupling ............. 223
Lights display message .................. 257
Mounting dimensions .................... 392
Parking Assist PARKTRONIC .......... 189
Power supply ................................. 227
Pulling away with a traile r.............. 143
Removing the ball coupling ............ 226
Trailer load s................................... 392 22
Index

Towing away
Important safety guidelines ........... 346
Installing the towing eye ................ 347
Notes for 4MATIC vehicles ............ 349
Removing the towing eye ............... 347
Transporting the vehicle ................ 348
With both axles on the ground ....... 347
Towing eye ......................................... 335
Traffic reports
see also Digital Operator's Man-
ual .................................................. 287
Traffic Sign Assist
Activating/deactivating the warn-ing function .................................... 238
Display message ............................ 264
Function/note s............................. 206
Important safety notes .................. 206
Instrument cluster display ............. 206
Trailer coupling
see Towing a trailer
Trailer loads and drawbar nose-
weights ............................................... 226
Trailer towing
Active Blind Spot Assist ................. 212
Active Lane Keeping Assist ............ 215
Blind Spot Assist ............................ 208
Permissible trailer loads and
drawbar noseweights ..................... 226
Transfer case ..................................... 155
Transmission
see Automatic transmission
Transmission position display ......... 149
Transporting the vehicle .................. 348
Traveling uphill
Brow of hill ..................................... 170
Driving downhill ............................. 170
Maximum gradient-climbing capa-
bility ............................................... 170
Trim pieces (cleaning instruc-
tions) .................................................. 332
Trip computer (on-board com-
puter) .................................................. 233
Trip odometer
Calling up ....................................... 233
Resetting (on-board computer) ...... 234
Trunk
see Tailgate Turn signals
Display message ............................ 257
Replacing bulbs (front) ................... 122
Switching on/of f........................... 116
Two-way radio
Frequencies ................................... 382
Installation ..................................... 382
Transmission output (maximum) .... 382
TWR (Tongue Weight Rating) (defi-
nition) ................................................. 372
Type identification plate
see Vehicle identification plate U
Unlocking Emergency unlocking ....................... 84
From inside the vehicle (central
unlocking button) ............................. 83
Upshift indicator (on-board com-
puter, Mercedes-AMG vehicles) ....... 242
USB devices
Connecting to the Media Inter-
face ............................................... 294 V
Vanity mirror (in the sun visor) ........ 305
Vehicle
Correct use ...................................... 31
Data acquisition ............................... 32
Display message ............................ 270
Equipment ....................................... 28
Individual settings .......................... 240
Limited Warranty ............................. 32
Loading .......................................... 362
Locking (in an emergency) ............... 84
Locking (SmartKey) .......................... 77
Lowering ........................................ 377
Maintenance .................................... 29
Operating safety .............................. 30
Parking .......................................... 158
Parking for a long period ................ 160
Pulling away ................................... 143
Raising ........................................... 374
REACH Regulation ........................... 31
Reporting problems ......................... 32
Securing from rolling away ............ 374 Index
23

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 240).
If the engine is running and you turn the light
switch to 0060or0058, 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 0058position.
This is a particularly useful function in the event
of rain and fog.
X To switch on the low-beam headlamps:
turn the SmartKey to position
0048in the igni-
tion lock or start the engine.
X Turn the light switch to 0058.
The green 0058indicator 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 to position 0048in the ignition lock or
start the engine.
X Turn the light switch to 0058or0071.
X Press the 005Ebutton.
The yellow 005Eindicator lamp in the instru-
ment cluster lights up.
X To switch off the rear fog lamp: press the
005E button.
The yellow 005Eindicator 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 0060parking
lamps over a period of several hours. If pos-
sible, switch on the right-hand 0064or left-
hand 0063 standing lamps. X
To switch on: turn the light switch to 0060.
The green 0060indicator lamp in the instru-
ment cluster lights up.
Standing lamps Switching on the standing lamps ensures the
corresponding side of the vehicle is illuminated.X To switch on the standing lamps: the
SmartKey should not be in the ignition lock or in key position 0092in the ignition lock.
X Turn the light switch to 0063(left-hand side of
the vehicle) or 0064(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
0043
High-beam headlamps
0044 Turn signal, right
0087 High-beam flasher
0085 Turn signal, left
X To indicate briefly: press the combination
switch briefly to the pressure point in the
direction of arrow 0044or0085.
The corresponding turn signal flashes three
times.
X To indicate: press the combination switch
beyond the pressure point in the direction of
arrow 0044or0085.
X To switch on the high-beam headlamps:
turn the light switch to 0058or0058.
X Press the combination switch beyond the
pressure point in the direction of arrow 0043.
In the 0058position, the high-beam head-
lamps are only switched on when it is dark and
the engine is running. 116
Exterior lightingLights and windshield wipers

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 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 003A
or 0046, the vehicle could pull away suddenly.
There is a risk of an accident.
When engaging transmission position 003Aor
0046, 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 241).
It is possible to shift the transmission from posi-
tion 005Dto the desired position only if you
depress the brake pedal. Only then is the park-
ing 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 160).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 0043.
The electric parking brake continues to brake
and prevent the vehicle from rolling back-
wards.
The red 0049(USA only) or 0024(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 0043.
the electric parking brake is released.
The red 0049(USA only) or 0024(Canada
only) indicator lamp in the instrument cluster
goes out.
Hill start assist Hill start assist helps you when pulling away
forward 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
leave the vehicle when it is held by hill start
assist. Driving
143Driving and parking Z

Kickdown
Use kickdown for maximum acceleration.
X Depress the accelerator pedal beyond the
pressure point.
The automatic transmission shifts to a lower
gear depending on the engine speed.
X Ease off the accelerator pedal once the
desired speed is reached.
The automatic transmission shifts back up.
Rocking the vehicle free Shifting back and forth between transmission
positions 005Band 005Ecan help to free up the
vehicle if it gets stuck in mud or snow. The vehi- cle's engine management system limits the
speed to a maximum of 5 mph (9 km/h) when
shifting back and forth. To shift repeatedly
between transmission positions 005Band 005E,
move the DIRECT SELECT lever up and down
beyond the pressure point.
Towing a trailer X
Drive in the middle of the engine speed range
on uphill gradients.
X Depending on the uphill or downhill gradient,
use the left-hand steering wheel paddle
shifter (Y page 152) to select a lower gear,
even if cruise control or Active Distance
Assist DISTRONIC is activated. Drive programs
Slippery drive program The
Slippery drive program has the following
characteristics:
R reduced engine and transmission settings for
optimum propulsion on slippery or snow-cov-
ered roads.
R optimized ESP ®
stability control on slippery or
snow-covered roads.
R the vehicle has improved driving stability on
slippery or snow-covered roads, for example. Comfort drive program The
Comfort drive program has the following
characteristics:
R comfort-oriented engine and transmission
settings.
R optimal fuel consumption resulting from the
automatic transmission shifting up sooner.
R the vehicle pulls away more gently in forward
and reverse gears, unless the accelerator
pedal is depressed fully.
R the automatic transmission shifting up
sooner. This results in the vehicle being driven
at lower engine speeds and the wheels being
less likely to spin.
Sport drive program The
Sport drive program has the following char-
acteristics:
R sporty engine and transmission settings.
R the automatic transmission shifts up later.
The fuel consumption possibly being higher
as a result of the later automatic transmission
shift points.
R the suspension exhibits sporty damping (vehi-
cles with AIRMATIC).
Drive program Sport Plus (Mercedes-
AMG vehicles) The
Sport Plus drive program has the following
characteristics:
R the vehicle exhibits particularly sporty driving
characteristics.
R the vehicle pulls away in first gear.
R the automatic transmission shifts up later.
The fuel consumption possibly being higher
as a result of the later automatic transmission
shift points.
R the suspension exhibits particularly firm
springing and damping settings (vehicles with
AIRMATIC).
R the ECO start/stop function is deactivated, it
can, however, be activated again using the
ECO button (Y page 145). Automatic trans
mission
151Driving an d parking Z

Further information on driving safety systems
(Y page 66). Cruise control
General notes Cruise control maintains a constant road speed
for you. It brakes automatically in order to avoid exceeding the set speed. You must select a
lower gear in good time on long and steep down-
hill gradients, especially if the vehicle is laden or towing a trailer. By doing so, you will make use of
the braking effect of the engine. This relieves the
load on the brake system and prevents the
brakes from overheating and wearing too
quickly.
Use cruise control only if road and traffic con-
ditions make it appropriate to maintain a steady speed for a prolonged period. You can store anyroad speed above 20 mph (30 km/h).
i Cruise control should not be activated when
driving off-road.
Important safety notes If you fail to adapt your driving style, cruise con-
trol can neither reduce the risk of an accident
nor override the laws of physics. Cruise control
cannot take into account the road, traffic and
weather conditions. Cruise control is only an
aid. You are responsible for the distance to the
vehicle in front, for vehicle speed, for braking in
good time and for staying in your lane.
Do not use cruise control:
R in road and traffic conditions which do not
allow you to maintain a constant speed, e.g. in
heavy traffic or on winding roads
R on slippery road surfaces. Braking or accel-
erating could cause the drive wheels to lose
traction and the vehicle could then skid
R when there is poor visibility, e.g. due to fog,
heavy rain or snow
If there is a change of drivers, advise the new
driver of the speed stored. Cruise control lever 0043
Activates or increases speed
0044 Activates or reduces speed
0087 Deactivates cruise control
0085 Activates at the current speed/last stored
speed
When you activate cruise control, the stored
speed is shown in the multifunction display for
five seconds.
Activation conditions To activate cruise control, all of the following
activation conditions must be fulfilled:
R the electric parking brake must be released.
R you are driving faster than 20 mph (30 km/h).
R ESP ®
must be active, but not intervening.
R the transmission must be in position 005B.
R DSR must be deactivated.
R the Offroad Plus drive program must be deac-
tivated (vehicles with the Off-road Engineer-
ing Package).
Storing, maintaining and calling up a
speed Storing and maintaining a speed
X Accelerate the vehicle to the desired speed.
X Briefly press the cruise control lever up 0043or
down 0085.
X Remove your foot from the accelerator pedal.
Cruise control is activated. The vehicle auto-
matically maintains the stored speed.
i Cruise control may be unable to maintain
the stored speed on uphill gradients. The
stored speed is resumed when the gradient
evens out. Cruise control maintains the Driving systems
171Driving and parking Z

stored speed on downhill gradients by auto-
matically applying the brakes.
Storing or calling up a speed G
WARNING
If you call up the stored speed and it differs
from the current speed, the vehicle acceler-
ates or decelerates. If you do not know the
stored speed, the vehicle could accelerate or brake unexpectedly. There is a risk of an acci-
dent.
Pay attention to the road and traffic condi-
tions before calling up the stored speed. If you do not know the stored speed, store the
desired speed again.
X Briefly pull the cruise control lever towards
you 0087.
X Remove your foot from the accelerator pedal.
Cruise control is operational and when first
activated stores the current speed or regu-
lates the speed of the vehicle to the stored
speed.
Setting a speed Keep in mind that it may take a brief moment
until the vehicle has accelerated or braked to
the speed set.
X Press the cruise control lever up 0043for a
higher speed or down 0044for a lower speed.
X To adjust the set speed in 1 mph incre-
ments (1 km/h increments):
briefly press
the cruise control lever up 0043or down 0044to
the pressure point.
Every time the cruise control lever is pressed
up 0043 or down 0044the last speed stored is
increased or reduced.
X To adjust the set speed in 5 mph incre-
ments (10 km/h increments):
briefly press
the cruise control lever up 0043or down 0044
beyond the pressure point.
Every time the cruise control lever is pressed
up 0043 or down 0044the last speed stored is
increased or reduced.
i Cruise control is not deactivated if you
depress the accelerator pedal. For example, if
you accelerate briefly to overtake, cruise con-
trol adjusts the vehicle's speed to the last
speed stored after you have finished overtak-
ing. Deactivating cruise control There are several ways to deactivate cruise con-
trol:
X Briefly press the cruise control lever for-
wards 0043.
or X Brake.
Cruise control is automatically deactivated if: R you engage the electric parking brake
R you are driving at less than 20 mph (30 km/h)
R ESP ®
intervenes or you deactivate ESP ®
R you activate DSR
R you activate the Offroad Plus program (vehi-
cles with the Off-road Engineering Package)
R you shift the transmission to position 005C
while driving
If cruise control is deactivated, you will hear a
warning tone. You will see the Cruise Con‐ Cruise Con‐
trol Off
trol Off message in the multifunction display
for approximately five seconds.
i When you switch off the engine, the last
speed stored is cleared. Active Distance Assist DISTRONIC
General notes Active Distance Assist DISTRONIC regulates the
speed and automatically helps you maintain the
distance from the vehicle detected in front.
Vehicles are detected with the aid of the radar
sensor system. Active Distance Assist
DISTRONIC brakes automatically so that the set
speed is not exceeded.
You must select a lower gear in good time on
long and steep downhill gradients, especially if
the vehicle is laden or towing a trailer. By doing so, you will make use of the braking effect of theengine. This relieves the load on the brake sys-
tem and prevents the brakes from overheating
and wearing too quickly.
If Active Distance Assist DISTRONIC detects
that there is a risk of a collision with the vehicle
in front, you will be warned visually and audibly.
Active Distance Assist DISTRONIC cannot pre-
vent a collision without your intervention. An
intermittent warning tone will then sound and
the distance warning lamp will light up in the
instrument cluster. Brake immediately in order 172
Driving systemsDriving and parking