Page 355 of 666

353 Operation
Tires and wheels
4
The GVWR includes the weight of the ve-
hicle, all occupants, fuel and cargo.
The GAWR is the total allowable weight
that can be carried by a single axle (front
or rear).
The GCWR is the total allowable weight
of vehicle and trailer when weighed in
combination.
Never exceed the GVWR, the GAWR for
either the front axle or rear axle or the
GCWR.
Warning
G
Do not overload the tires by exceeding the
specified load limit as indicated on the
tire and loading information placard on
the driver’s door B-pillar or on the certifi-
cation label below the driver’s seat on the
mounting pillar. Overloading the tires can
overheat them, possibly causing a blow-
out. Overloading the tires can also result
in handling or steering problems, or brake
failure.
Continued
Warning (Continued)
G
Overloading of tires is dangerous. Over-
loading can cause tire failure, affect vehi-
cle handling, and increase the stopping
distance. Use tires of the recommended
load capacity for the vehicle. Never over-
load them.
nf_BA.book Page 353 Friday, January 25, 2008 3:53 PM
Page 371 of 666

369 Operation
Tires and wheels
4
Warning (Continued)
G
Always ensure that you re-calibrate the
TPMS after you inflated the tires to the
recommended cold inflation pressure.Always adjust tire inflation pressure ac-
cording to the tire and loading information
placard on the driver’s door B-pillar.Underinflated tires wear excessively and/
or unevenly, adversely affect handling and
fuel economy, and are more likely to fail
from being overheated.
Continued
Warning (Continued)
G
Overinflated tires can adversely affect
handling and ride comfort, wear unevenly,
increase stopping distance, and result in
sudden deflation (blowout) because they
are more likely to become punctured or
damaged by road debris, potholes etc.The TPMS is not able to issue a warning
due to a sudden dramatic loss of pressure
(e.g. tire blowout caused by a foreign ob-
ject). In this case bring the vehicle to a
halt by carefully applying the brakes and
avoiding abrupt steering maneuvers.
Warning
G
Each tire, including the spare (if provided),
should be checked monthly when cold
and inflated to the inflation pressure rec-
ommended by the vehicle manufacturer
on the tire and loading information plac-
ard. (If your vehicle has tires of a different
size than the size indicated on the vehicle
placard or the tire inflation pressure label,
you should determine the proper tire infla-
tion pressure for those tires).
Continued
nf_BA.book Page 369 Friday, January 25, 2008 3:53 PM
Page 374 of 666

372 OperationTires and wheels
4
\1
Make sure the tire inflation pressure
of all four tires is correct, using the
tire and loading information placard
1 or the tire inflation pressure placard
located on the driver’s door B-pillar
(
\2
page 362).
In addition to the placard also con-
sult the tire inflation pressure table
(
\2
page 628).
Warning
G
It is the driver’s responsibility to calibrate
the TPMS on the recommended cold infla-
tion pressure. Underinflated tires affect
the ability to steer or brake the vehicle.
You might lose control over the vehicle.1. For vehicles with a gross weight capacity less
than 10 000 lbs (4 536 kg) (USA only).
iReactivate the TPMS after adjusting
the tire inflation pressure to the infla-
tion pressure recommended for the
vehicle operating condition. Tire
pressure should only be adjusted on
cold tires. Observe the recommend-
ed tire inflation pressure on the tire
and loading information placard on
the driver’s door B-pillar
(\2
page 354).
nf_BA.book Page 372 Friday, January 25, 2008 3:53 PM
Page 377 of 666
375 Operation
Tires and wheels
4 i
When the message
Tire pres. dis-
played after driving for several
minutes
appears in the multifunction
display, the individual inflation pres-
sure values are matched with the
tires. The individual values are dis-
played after a few minutes' driving.54.32-2278-31
Warning
G
It is the driver’s responsibility to calibrate
the TPMS on the recommended cold infla-
tion pressure. Underinflated tires affect
the ability to steer or brake the vehicle.
You might lose control over the vehicle.
iIf a spare wheel without wheel sen-
sors is mounted, the system may still
indicate the tire inflation pressure of
the removed wheel for some min-
utes. If this happens, keep in mind
that the indicated value where the
spare wheel is mounted does not re-
flect the actual spare tire inflation
pressure.
nf_BA.book Page 375 Friday, January 25, 2008 3:53 PM
Page 378 of 666

376 OperationTires and wheels
4
Warning
G
The TPMS does not warn you against in-
correctly selected tire inflation pressure
and does not warn you when the tire pres-
sure is not properly selected for the re-
spective vehicle load. It warns you only
when the pressure of one or more tires
decreases significantly below the refer-
ence inflation pressure which was stored
at the time of calibration of the TPMS af-
ter you inflated the tires.Always ensure that you recalibrate the
TPMS after you have inflated the tires to
the recommended cold inflation pressure.
Continued
Warning (Continued)
G
Always adjust the tire inflation pressure
according to the tire and loading informa-
tion placard on the driver’s door B-pillar.Underinflated tires wear excessively and/
or unevenly, adversely affect handling and
fuel economy, and are more likely to fail
from being overheated.Overinflated tires can adversely affect
handling and ride comfort, wear unevenly,
increase stopping distance, and result in
sudden deflation (blowout) because they
are more likely to become punctured or
damaged by road debris, potholes etc.
Continued
Warning (Continued)
G
The TPMS is not able to issue a warning
due to a sudden dramatic loss of pressure
(e.g. tire blowout caused by a foreign ob-
ject). In this case bring the vehicle to a
halt by carefully applying the brakes and
avoiding abrupt steering maneuvers.
nf_BA.book Page 376 Friday, January 25, 2008 3:53 PM
Page 381 of 666

379 Operation
Tires and wheels
4
Reactivating the Advanced TPMSThe TPMS must be reactivated when you
have adjusted the tire inflation pressure
to a new level (e.g. because of different
load or driving conditions). The TPMS is
then recalibrated to the current tire in-
flation pressures.
\1
Make sure the tire inflation pressure
of all four tires is correct, using the
tire and loading information placard
1
or the tire inflation pressure placard
located on the driver’s door B-pillar
(
\2
page 362).
Warning!
G
It is the driver’s responsibility to calibrate
the TPMS on the recommended cold infla-
tion pressure. Underinflated tires affect
the ability to steer or brake the vehicle.
You might lose control over the vehicle.
1. For vehicles with a gross weight capacity less
than 10 000 lbs (4 536 kg) (USA only).
iReactivate the TPMS after adjusting
the tire inflation pressure to the infla-
tion pressure recommended for the
vehicle operating condition. Tire in-
flation pressure should only be adju-
sted on cold tires. Observe the
recommended tire inflation pressure
on the tire and loading information
placard
1 or on the tire inflation pres-
sure placard on the driver’s door B-
pillar (\2
page 362).
nf_BA.book Page 379 Friday, January 25, 2008 3:53 PM
Page 387 of 666

385 Operation
Tires and wheels
4
The commercial vehicle tires based on
European standards may have an addi-
tional value in the parentheses (as illus-
trated). In such cases, the value
preceding the parentheses is valid for
European countries and the parenthe-
sized for the USA and Canada.
Refer also to "Maximum tire load"
(\2
page 390) where the maximum load
associated with the load index is indicat-
ed in kg and lbs.
Warning
G
The tire load rating must always be at
least half of the GAWR of your vehicle.
Otherwise, tire failure may be the result
which may cause an accident and/or se-
rious personal injury to you or others.
Always replace rims and tires with the
same designation, manufacturer and type
as shown on the original part.
Warning
G
Do not overload the tires by exceeding the
specified load limit as indicated on the
placard located on the driver’s door B-pil-
lar. Overloading the tires can overheat
them, possibly causing a blowout. Over-
loading the tires can also result in han-
dling or steering problems, or brake
failure.iTire load rating
6
and tire speed
rating
7
are also referred to as “ser-
vice description”.
nf_BA.book Page 385 Friday, January 25, 2008 3:53 PM
Page 393 of 666

391 Operation
Tires and wheels
4
For more information on tire load rating,
refer to "Tire size designation, load and
speed rating" (
\2
page 383).
For information on calculating total and
cargo load capacities, refer to "Tire and
loading information" (
\2
page 352).
1Maximum permissible tire inflation pres-
sure
Warning
G
Do not overload the tires by exceeding the
specified load limit as indicated on the
tire and loading information placard on
the driver’s door B-pillar. Overloading the
tires can overheat them, possibly causing
a blowout. Overloading the tires can also
result in handling or steering problems, or
brake failure.Never overload them.The vehicle maximum load on the tire
must not exceed the load carrying capac-
ity of the tire on your vehicle.
Continued
Warning (Continued)
G
You will not exceed the tire’s load carrying
capacity if you adhere to the loading con-
ditions, tire size and cold tire inflation
pressures specified on the tire and load-
ing information placard.
Maximum tire inflation pressure
nf_BA.book Page 391 Friday, January 25, 2008 3:53 PM