2007 MERCEDES-BENZ ML500 trailer

372 OperationTires and wheelsThe higher the weight of all occupants, the
less cargo and luggage load capacity is
available.
For more information, see “Trailer tongue
load” (
page 373).
Example
Combined
weight limit
of occu-
pants and
cargo from
placard
Number of
occupants
(driver and
passengers)
Seating
configura-
tion
Occupants weight
Combined
weight of all
occupants
Available cargo/luggage and trailer
tongue weight (total load limit from
placard minus combined weight of
all occupants)
1
1500 lbs
5
front: 2
rear: 3
Occupant 1: 150 lbs
Occupant 2: 180 lbs
Occupant 3: 160 lbs
Occupant 4: 140 lbs
Occupant 5: 120 lbs
750 lbs
1500 lbs - 750 lbs = 750 lbs
2
1500 lbs
3
front: 1
rear: 2
Occupant 1: 200 lbs
Occupant 2: 190 lbs
Occupant 3: 150 lbs
540 lbs
1500 lbs - 540 lbs = 960 lbs
3
1500 lbs
1
front:1
Occupant 1: 150 lbs
150 lbs
1500 lbs - 150 lbs = 1350 lbs

373 Operation
Tires and wheels
Certification label
Even after careful determination of the
combined weight of all occupants, cargo
and the trailer tongue load (if applicable)
(page 373) as to not exceed the permis-
sible load limit, you must make sure that
your vehicle never exceeds the Gross
Vehicle Weight Rating (GVWR) and the
Gross Axle Weight Rating (GAWR) for ei-
ther the front or rear axle. You can obtain
the GVWR and GAWR from the certification
label. The certification label can be found
on the driver’s door B-pillar, see “Technical
data” (
page 527).Gross Vehicle Weight Rating (GVWR): The
total weight of the vehicle, all occupants,
all cargo, and the trailer tongue load
(
page 373) must never exceed the
GVWR.
Gross Axle Weight Rating (GAWR): The to-
tal allowable weight that can be carried by
a single axle (front or rear).
To assure that your vehicle does not ex-
ceed the maximum permissible weight
limits (GVWR and GAWR for front and rear
axle), have the loaded vehicle (including
driver, passengers and all cargo and, if ap-
plicable, trailer fully loaded) weighed on a
suitable commercial scale.Trailer tongue load
The tongue load of any trailer is an impor-
tant weight to measure because it affects
the load you can carry in your vehicle. If a
trailer is towed, the tongue load must be
added to the weight of all occupants riding
and any cargo you are carrying in the
vehicle. The tongue load typically is
between 10% and 15% of the trailer weight
and everything loaded in it.
For more information on trailer tongue
load, see “Loading a trailer” (
page 343).

395 Operation
Tires and wheels
Bar
Another metric unit for air pressure. There
are 14.5038 pounds per square inch (psi)
to 1 bar; there are 100 kilopascals (kPa)
to 1 bar.
Bead
The tire bead contains steel wires wrapped
by steel cords that hold the tire onto the
rim.
Cold tire inflation pressure
Tire inflation pressure when your vehicle
has been sitting for at least 3 hours or
driven no more than 1 mile (1.6 km).
Curb weight
The weight of a motor vehicle with stan-
dard equipment including the maximum
capacity of fuel, oil, and coolant, and, if so
equipped, air conditioning and additional
optional equipment, but without passen-
gers and cargo.DOT (D
epartment o
f T
ransportation)
A tire branding symbol which denotes the
tire meets requirements of the
U.S. Department of Transportation.
GAWR (G
ross A
xle W
eight R
ating)
The GAWR is the maximum permissible
axle weight. The gross vehicle weight on
each axle must never exceed the GAWR for
the front and rear axle indicated on the
certification label located on the driver’s
door B-pillar.
GTW (G
ross T
railer W
eight)
The GTW is the weight of the trailer plus
the weight of all cargo, equipment, luggage
etc. loaded on the trailer.GVW (G
ross V
ehicle W
eight)
The GVW comprises the weight of the
vehicle including fuel, tools, spare wheel,
installed accessories, passengers and
cargo and, if applicable, trailer tongue
load. The GVW must never exceed the
GVWR indicated on the certification label
located on the driver’s door B-pillar.
GVWR (G
ross V
ehicle W
eight R
ating)
This is the maximum permissible vehicle
weight of the fully loaded vehicle (weight of
the vehicle including all options, passen-
gers, fuel, and cargo and, if applicable,
trailer tongue load). It is indicated on
certification label located on the driver’s
door B-pillar.
Kilopascal (kPa)
The metric unit for air pressure. There are
6.9 kPa to 1 psi; another metric unit for air
pressure is bars. There are 100 kilopascals
(kPa) to 1 bar.

397 Operation
Tires and wheels
Tire ply composition and material used
This indicates the number of plies or the
number of layers of rubber-coated fabric in
the tire tread and sidewall. Tire manufac-
turers also must indicate the ply materials
in the tire and sidewall, which include
steel, nylon, polyester, and others.
Tire speed rating
Part of tire designation; indicates the
speed range for which a tire is approved.
Traction
Force exerted by the vehicle on the road
via the tires. The amount of grip provided.
Tread
The portion of a tire that comes into
contact with the road.Treadwear indicators
Narrow bands, sometimes called
“wear bars” that show across the tread of
a tire when only
1/16in (1.6 mm) of tread
remains.
TWR (T
ongue W
eight R
ating)
Maximum permissible weight on trailer
tongue.
Uniform Tire Quality Grading Standards
A tire information system that provides
consumers with ratings for a tire’s traction,
temperature and treadwear. Ratings are
determined by tire manufacturers using
government testing procedures. The
ratings are molded into the sidewall of the
tire.Vehicle maximum load on the tire
Load on an individual tire that is
determined by distributing to each axle its
share of the maximum loaded vehicle
weight and dividing it by two.
Rotating tires
Tire rotation can be performed on vehicles
with tires of the same dimension all
around. If your vehicle is equipped with
tires of the same dimension all around,
tires can be rotated, observing a
front-to-rear rotation pattern that will
maintain the intended rotation (spinning)
direction of the tire (
page 368).
Warning!
G
Rotate front and rear wheels only if they are
of the same dimension.
If your vehicle is equipped with mixed-size
tires (different tire dimensions front vs.
rear), tire rotation is not possible.

467 Practical hints
What to do if …
Display symbol
Display messages
Possible cause/consequence
Possible solution
n
Level selection
not permitted
You are driving too fast for the desired
vehicle level*.

Reduce vehicle speed.

Set the desired vehicle level again
(page 271).
You are towing a trailer or using acces-
sories that are connected to the trailer
power socket, e.g. a bicycle rack.
Leveling cancelled
You have selected another vehicle
level*.
p
Reduce speed to
under 20 mph
You are driving too fast for the set vehi-
cle level*.

Do not drive faster than 20 mph
(30 km/h).
Visit workshop
The air suspension* functional only to a
limited extent.

Do not drive faster than 50 mph
(80 km/h) depending on the set
vehicle level.

Have the vehicle checked at an au-
thorized Mercedes-Benz Light
Truck Center.

521 Practical hints
Towing the vehicle
Installing towing eye bolt
Take the towing eye bolt and wheel bolt
wrench from the vehicle tool kit
(page 469).

Screw towing eye bolt in clockwise to
its stop and tighten with wheel wrench.
Removing towing eye bolt

Loosen towing eye bolt counterclock-
wise with wheel wrench.

Unscrew towing eye bolt.

Store the towing eye bolt and wheel
bolt wrench back into the vehicle tool
kit (
page 469).
Installing cover

Engage cover1 at top and press at
bottom.
Stranded vehicle
Freeing a stranded vehicle, on which the
wheels are dug into sand or mud, should
be done with the greatest of care, especial-
ly if the vehicle is heavily loaded.
Avoid pulling the vehicle abruptly or diago-
nally, since it could result in damage to the
chassis alignment.
Never try to free a vehicle that is still cou-
pled to a trailer.
If possible, a vehicle equipped with trailer
hitch receiver should be pulled backward
in its own previously made tracks.

553 Index
A
ABS 96
Indicator lamp 414
Messages in the multifunction
display 430
Off-road - ABS 97
Accelerator position, automatic
transmission 191
Accessory weight 394
Accident 64
Active head restraint 80, 128, 479
Adaptive Damping System (ADS)* 269
Air bags 71
Children 73, 82
Front passenger front air bag off
indicator lamp 31, 89, 426
Front, Driver 75
Front, Passenger 75
Occupant Classification System
(OCS) 85
Safety guidelines 73
Side impact (front and rear*) 76
Window curtain 76Air conditioning refrigerant 546
Air conditioning system see
Climate control or Automatic climate
control (3-zone)*
Air conditioning, Cooling 216, 230
Air distribution, Front 212, 226
Air distribution, Rear 219, 234
Air pressure see Tire inflation pressure
Air pump, electric (ML 63 AMG) 502
Air recirculation mode 214, 228
Air suspension package* 269
Adaptive Damping System
(ADS)* 269
Messages in the multifunction
display 467
Vehicle level control* 270
Air vents 219
Air vents, Front 212, 226
Air vents, Rear 235
Air volume 212, 227Alarm system see Anti-theft systems
Alignment bolt (vehicle tool kit) 470, 500
Anticorrosion/antifreeze 550
Antiglare, Interior rear view mirror 200
Antiglare, Rear view mirrors* 201
Antilock Brake System see ABS
Anti-theft systems 104
Anti-theft alarm system 103, 104
Immobilizer 103
Aquaplaning see Hydroplaning
Armrest storage compartments
Front 296
Ashtrays* 300
Aspect ratio 394
ATF 362
Attaching a trailer 344
Audio menu 159
CD operation 161
Radio operation 160
Satellite radio* operation
(USA only) 160
Auto-dimming*, Rear view mirrors 201
Automatic central locking,
Control system 176

554 IndexAutomatic climate control (3-zone)* 220
Air conditioning, Cooling 230, 231
Air distribution, Front 226
Air distribution, Rear 234
Air recirculation mode 228
Air vents, Front 226
Air volume 227
Control panel, Front 222
Control panel, Rear 232
Deactivating system 224
Defogging 227
Defrosting 227
Maximum cooling, MAX COOL 228
Rear passenger compartment 232
Rear window defroster 205
Residual engine heat (REST) 232
Using driver-side settings for
all temperature zones 231
Automatic headlamp mode 137
Automatic lighting control, Interior
lighting 143
Automatic locking when driving 126
Automatic shift program
(ML 63 AMG only) 196Automatic transmission 54
Accelerator position 191
Automatic shift program
(ML 63 AMG only) 196
Emergency operation
(Limp-Home Mode) 198
Gear ranges 193
Gear selector lever 54, 185
Gear shifting malfunctions 198
Hill start assist system 192
Kickdown 191
Kickdown, manual shift program
(ML 63 AMG only) 198
Manual shift progam
(ML 63 AMG only) 196
Program mode selector switch
(ML 63 AMG only) 195
Shift program (ML 63 AMG only) 195
Shifting procedure 188
Starting the engine 54
Steering wheel gearshift control 194
Towing a trailer 192
Transmission fluid level 362
Transmission positions 189
Automatic Transmission Fluid see ATFB
Backrest
Seat 44
Seat, Lumbar support 130
Seat, Multicontour* 130
Backup lamps
Messages in the
multifunction display 458
Replacing bulbs 490
Bar 395
BAS 97
Lamps in instrument cluster 414
Messages in the
multifunction display 430
Basic carrier bars* 281
Batteries, SmartKey
Check lamp 108, 112
Checking battery condition 111
Messages in the
multifunction display 446
Replacing 480
Battery, Vehicle 507
Charging 514
Disconnecting and connecting 509
Jump starting 515
Removing and installing 509