width Alfa Romeo 147 2005 Owner handbook (in English)

GETTING TO KNOW YOUR CAR
133
HEADLIGHT ADJUSTMENT
ABROAD
(fig. 135)
The dipped-beam headlights are adjusted
for circulation in the country in which the ve-
hicle is marketed. In countries with opposite
circulation, to avoid glaring oncoming vehi-
cles it is necessary to cover the areas of the
headlight as shown below; this is done us-
ing non-transparent sticker tape.
The illustration refers to passing from right-
hand drive to left-hand drive.
GAS DISCHARGE
HEADLIGHTS
(optional for versions/markets
where applicable)
The gas (xenon) discharge headlights op-
erate with a voltaic arc, in an ambient sat-
urated with pressure xenon, instead of the
glow filament.
The resulting illumination is sensibly high-
er to that of conventional lamps, both for
light quality (clearer light) and for the width
and positioning of the illuminated area.
The advantages of better illumination can
be perceived (due to less eyesight fatigue
and greater orientation capacity for the dri-
ver, which in turn means higher driving safe-
ty) especially in case of bad weather, fog
and/or insufficient road signs, thanks to the
better illumination of the side parts of the
visual field, normally obscured.
The large increase of the side part illumi-
nation increases driving safety since it allows
the driver to better see the other users on
the edge of the road (pedestrians, cyclists
and bikers).The triggering of the voltaic arc requires a
very high voltage, while subsequent power
supply can take place at a low voltage.
The headlights achieve their top luminosi-
ty approx. 15 seconds after they are switched
on.
The intense light produced by this type of
headlights requires the use of an automat-
ic system to keep headlight trim constant
and avoid dazzling the vehicles coming from
the opposite direction in case of braking, ac-
celeration or when carrying loads.
The electric mechanical system for auto-
matically keeping the trim constant, makes
unnecessary the device for compensating
the headlight dip and the visual indication
of the position on the display.
Xenon lights have a very long life, there-
fore breakdowns are unlikely.
If necessary, have the sys-
tem checked and repaired
only by Alfa Romeo Authorized
Services.
WARNING

TECHNICAL SPECIFICATIONS
249
RIMS AND TYRES
Alloy rims.
Radial Tubeless tyres.
The Log book shows all the homologated
tyres.
IMPORTANTIn the event of any dis-
crepancies between this Handbook and the
vehicle Log Book, only the latter should be
considered.
While the specified dimensions remain the
same, for driving safety, the vehicle must be
fitted with tyres of the same brand and type
on all wheels.
IMPORTANTDo not use inner tubes
with Tubeless tyres.
CORRECT TYRE
READING
(fig. 5)
Below are the instructions necessary to
know the meaning of the code stamped on
the tyre.
The code may be like one of the examples
given below.Load index (capacity)
60= 250 kg
61= 257 kg
62= 265 kg
63= 272 kg
64= 280 kg
65= 290 kg
66= 300 kg
67= 307 kg
68= 315 kg
69= 325 kg
70= 335 kg
71= 345 kg
72= 355 kg
73= 365 kg
74= 375 kg
75= 387 kg
76= 400 kg
77= 412 kg
78= 425 kg
79= 437 kg
80= 450 kg
81= 462 kg
82= 475 kg
83= 487 kg84= 500 kg
85= 515 kg
86= 530 kg
87= 545 kg
88= 560 kg
89= 580 kg
90= 600 kg
91= 615 kg
92= 630 kg
93= 650 kg
94= 670 kg
95= 690 kg
96= 710 kg
97= 730 kg
98= 750 kg
99= 775 kg
100= 800 kg
101= 825 kg
102= 850 kg
103= 875 kg
104= 900 kg
105= 925 kg
106= 950 kg
Example:
225/45 ZR17 91Y
225= Nominal width (S, distance
in mm between sides).
45= Percentage height/width ratio
(H/S).
ZR= Radial tyre with speed above
240 kph.
17= Rim diameter in inches (Ø).
91= Load index (capacity).
Y= Maximum speed index.

TECHNICAL SPECIFICATIONS
250
Example:
7.5 J x 17 H2 ET 43
Maximum speed index
Q= up to 160 km/h
R= up to 170 km/h
S= up to 180 km/h
T= up to 190 km/h
U= up to 200 km/h
H= up to 210 km/h
V= up to 240 km/h
W= up to 270 km/h
Y= up to 300 km/h
Maximum speed index
for snow tyres
Q M + S= up to 160 km/h
T M + S= up to 190 km/h
H M + S= up to 210 km/hCORRECT RIM READING
Below are the instructions necessary to
know the meaning of the code stamped on
the rim, as shown in fig. 5.
fig. 5
A0M0465m
7.5= rim width in inches (1)
J= rim drop centre outline (side pro-
jection where the tyre bead rests
(2)
17= rim nominal diameter in inches
(corresponds to diameter of the
tyre to be mounted) (3=Ø)
H2= “hump“ shape and number (relief
on the circumference holding the
Tubeless tyre bead on the rim)
ET 43= camber angle (distance be-
tween disk/rim line and wheel
rim centre line)