Dirt buildup on headlamp lenses increases glare to other road users, even
at levels too low to reduce seeing performance significantly for the driver.

Therefore, headlamp lens cleaners are required by ECE Regulation 48 on vehicles equipped
with low-beam headlamps using light sources that have a reference luminous flux of 2,000
lumens or more. This includes all HID headlamps and some high-power halogen units.

Some cars have lens cleaners fitted as standard or available as optional equipment even
where the headlamp specifications and/or prevailing technical regulations do not require them.
North America, for example, does not use ECE regulations, and FMVSS 108 does not require lens
cleaners on any headlamps, though they are permitted.

http://en.wikipedia.org/wiki/Headlamp#Lens_cleaners
http://www.unece.org/trans/main/wp29/wp29regs/r048r5e.pdf (page 33, 6.2.9 punktas)

O tai, kad usa ne pas visus(?) E90 prie xenon eina apiplovimas, kad i evo ji det
pradejo tik nuo 2009(?), ar kad tave TAC murziai "praleido", imho nera kazkoks rodiklis,
ir nerodo ar tai yra reikalinga/butina, ar ne :)

zhaltas wrote:
> i evo tik nuo 2009m pradejo det apiplovima, nors xenonus galima buvo 
> uzhsisakyt jau turbut 2002m ;)
> Taigi kovojau su sertifikacijos pridurkais, laimejau :P

>> Liudas wrote:
>>> O tai kodel ne pas visus usa E90 xenon apiplovimas yra, jei jau taip 
>>> reikalingas???


-- 
Ar zinojote, kad "o tau trukdo?" yra labiau diagnoze, nei klausimas? :)