Technical data

Less energy, more light:
the Audi A3 models with full-LED headlights.
Daytime running light Dipped beam Indicator
LED headlights
Conventional light bulbs reach temperatures of up to 300 °C. LED lights are more
efficient despite greater light output, but due to their sophisticated technology they
are somewhat more sensitive and should not get hotter than 150 °C. Because of the
engine, the temperature of the area around the headlights is already around 120 °C.
In theory, then, LED headlights would need an additional cooling system to be able
to work. However, the Audi engineers did not want to spoil the good low-energy
credentials of the LED headlights, so they developed a fan which directs heat away
from the LED chips. The special feature of this fan is its additional benefit. The high
operating temperature of standard bulbs means that they can defrost the headlights,
which LEDs cannot. The newly developed fan, however, directs warm air from the LED
chips directly to the headlight lens and thus supports headlight defrosting.
<300 °C
About lights
Full-LED headlights are available as an option for
the A3 models. The LED technology allows near
daylight illumination of the road and stands out
in comparison with conventional lighting due to
its lower energy consumption and longer service
life.
The LED headlights bring dipped beam, high
beam and the combined daytime running light,
position light and indicator function together in a
single light guide unit. The striking Audi light
pattern in daytime and night-time design gives
the headlight a characteristic look.
The right lights in every situation: the turning
light supplements illumination alongside the
vehicle in tight bends and when turning corners.
The headlight also has a motorway light that
extends the range of the light cone at speeds
above approx. 110 km/h. The headlight functions
are rounded off by the all-weather light which
does away with the need for conventional front
fog lights. The individual LED modules are skilfully
controlled to form a wide light distribution
pattern, reducing glare from fog, rain or snow.
The different headlight light distribution patterns
town light, motorway light and country light
are activated according to speed and can also be
controlled using the stored route data of the
optional MMI navigation plus with MMI touch.
The junction light with a broad spread of light
from the front lighting system completes the
convenient lighting assistant functions. The
combination of all these measures results in
a balanced light pattern and more comfortable
driving for you.
The fuel consumption and CO₂ emission figures as well as the efficiency classes can be found from page 122 onwards.
LED headlights70
A3S3_A3S3SB_Technik18_2013_09.indd 70 06.08.13 12:02