[Kayu]

Mała ciekawostka odnośnie świateł - światła w trybie świateł do jazdy dziennej (włączony tryb skandynawski, wlacznik świateł na 0 lub AUTO i jasno na dworze) pracują na obniżonym napięciu (w przypadku żarówek konwencjonalnych oszczędza to ich żywotność, brak podświetlenia tablicy w pozycji "0" ma uświadamiać kierowcy, że ma włączone światła pracujące z niepełną mocą - szkoda że sprzedawca w salonie nie posiadał tej wiedzy i usiłował mnie przekonać, że ten brak podświetlenia to TTTM).

Description and Operation


In areas in which daytime running lamps (DRL) are required by law the generic electronic module (GEM) switches on the dipped beam headlamps and the side lights whenever the ignition is in position "II" or "III".

The configuration in the GEM can be changed using the Worldwide Diagnosis System (WDS). This makes aftermarket configuration of vehicles with DRL possible (e.g. on customer request or in response to changes in the law).

Vehicles with DRL can be combined with autolamps.

On vehicles with conventional filament bulbs the GEM switches on the dipped beam headlamps and the side lights in light switch position "0", whereby the dipped beam headlamps are limited via pulse-width-modulation (PWM) to around 11.5V and therefore only operate at 90 % of their normal brightness.

On vehicles with gas discharge headlamps the PWM control is not active - the dipped beam headlamps come on with normal intensity.

Operation

The daytime running lamps (DRL) system is designed to turn the dipped beam headlamps, parking lamps and licence plate lamps ON automatically as soon as engine is running.

The instrument cluster illumination is not switched on in this mode so as to make the driver aware that he has not switched on the normal dipped beam.

To increase the service life of conventional filament bulbs, the bulbs are operated at a reduced voltage of 11.5 volts maximum when the daytime running lamps (DRL) are switched on; this also reduces the brightness of the lamps. By contrast, xenon headlamps are also operated at a reduced voltage in daytime running lamp (DRL) mode, but they operate at normal brightness.

Vehicles with and without daytime running lamps are no longer distinguished from each other by their different headlamp connections; instead, they have different software configurations in the GEM.

The daytime running lamps (DRL) are ON under the following conditions:
Ignition switch in position RUN and
Headlight switch in position OFF or
Headlight switch in automatic headlamps position if light conditions are sufficient.

The daytime running lamps (DRL) are OFF under the following conditions:
The ignition switch is in any position except RUN or
Headlight switch in parking light position or
Headlight switch in dipped beam position or
Headlight switch in automatic headlamps position and light conditions are not sufficient.