Page 404 of 570
403 Operation
Tires and wheels
Rim
A metal support for a tire or a tire and tube
assembly upon which the tire beads are
seated.
Sidewall
The portion of a tire between the tread and
the bead.
TIN (T
ire Identification Number)
Unique identifier which facilitates efforts
by tire manufacturers to notify purchasers
in recall situations or other safety matters
concerning tires and gives purchases the
means to easily identify such tires. The TIN
is comprised of “Manufacturer’s identifica-
tion mark”, “Tire size”, “Tire type code”
and “Date of manufacture”.
Tire load rating
Numerical code associated with the
maximum load a tire can support.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 Weight Rating)
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.
Page 520 of 570
519 Practical hints
Towing the vehicle
Removing cover
Press mark on cover1 as indicated by
the arrow.
Lift off cover1 to reveal the threaded
hole for towing eye bolt.
Installing towing eye bolt
Take the towing eye bolt and wheel
wrench from the vehicle toolkit
(
page 473).
Screw towing eye bolt in 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
wrench back into the vehicle toolkit
(
page 473).
Engage cover1 at top and press at
bottom.
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, espe-
cially 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.
Page 556 of 570
555 Index
Gross Axle Weight Rating see GAWR
Gross Trailer Weight see GTW
Gross Vehicle Weight Rating see GVWR
Gross Vehicle Weight see GVW
GTW 401
GVW 402
GVWR 402
H
Halogen headlamps see Headlamps
Hands-free microphone 33
Hard plastic trim items, cleaning 417
Hazard warning flasher 152
Head restraints
Active head restraint 83, 137
Front seats 45
Rear seats 139, 140
Headlamp cleaning system* 212, 372
Reservoir capacity 539
Headlamp shut-off delay see Delayed
shut-off, Exterior lampsHeadlamps
Automatic headlamp mode 147
Bi-Xenon* 485
Cleaning lenses 413
Cleaning system* 212, 372
Halogen 485
Light sensor, Messages in the multi-
function display 463
Manual headlamp mode 147
Messages in the multifunction
display 463–468
Replacing bulbs 484, 485
Switch 59, 146
Headliner, Cleaning 417
Heated seats see Seat heating*
Heated steering wheel* 326
High beam flasher 59, 150
High beam headlamps
Indicator lamp 29
Messages in the multifunction
display 464
Replacing 484
Switching on 59, 150High mounted brake lamp 485
High-performance brake system (AMG ve-
hicles only) 350
Hinged quarter windows* see Power win-
dows
Hood 364
Messages in the multifunction
display 460
Opening 364
Hooks
Loading 300
Horn 25
HVAC see Climate control or Automatic cli-
mate control (3-zone)*
Hydroplaning 352