Editing Headlamp (section)

=== {{Anchor|Adaptive highbeam|Adaptive Highbeam Assist}} Adaptive highbeam ===
''Adaptive Highbeam Assist'' is [[Mercedes-Benz]]'s marketing name for a headlight control strategy that continuously automatically tailors the headlamp range so the beam just reaches other vehicles ahead, thus always ensuring maximum possible seeing range without glaring other road users.<ref>{{cite web |url= http://www.daimler.com/dccom/0-5-1210218-1-1210317-1-0-0-1210228-0-0-135-0-0-0-0-0-0-0-0.html |title= Adaptive Highbeam Assist - the Intelligent Headlamp |access-date= 29 May 2014 |url-status= dead |archive-url= https://web.archive.org/web/20140221114927/http://www.daimler.com/dccom/0-5-1210218-1-1210317-1-0-0-1210228-0-0-135-0-0-0-0-0-0-0-0.html |archive-date= 21 February 2014}}</ref> It was first launched in the [[Mercedes-Benz W212|Mercedes E-class]] in 2009.<ref name="mediadaimler2008"/> It provides a continuous range of beam reach from a low-aimed low beam to a high-aimed high beam, rather than the traditional binary choice between low and high beams.

The range of the beam can vary between 65 and 300 meters, depending on traffic conditions. In traffic, the low beam cutoff position is adjusted vertically to maximise seeing range while keeping glare out of leading and oncoming drivers' eyes. When no traffic is close enough for glare to be a problem, the system provides full high beam. Headlamps are adjusted every 40 milliseconds by a camera on the inside of the front windscreen which can determine distance to other vehicles.<ref>{{cite web|url= http://www.atzonline.com/index.php;do=show/site=a4e/sid=133017103449f0bc10645b9036761195/alloc=3/id=9388 |title=The Car Learns How to See - Camera-Based Assistance Systems |first1=Jürgen |last1=Seekircher |first2=Bernd |last2=Woltermann |first3=Axel |last3=Gern |first4=Reinhard |last4=Janssen |first5=Dirk |last5=Mehren |first6=Martin |last6=Lallinger |publisher=Springer Automotive Media |date=January 2009 |access-date=29 May 2014}}</ref> The [[Mercedes-Benz W221|S-Class]], [[Mercedes-Benz CLS-Class (W218)|CLS-Class]] and [[Mercedes-Benz C-Class|C-Class]] also offer this technology. In the CLS, the adaptive high beam is realised with LED headlamps - the first vehicle producing all adaptive light functions with LEDs. 

This technology is also known as ''Adaptive Driving Beams'' (ADB).<ref name=cnn24>{{Cite web |last=Valdes-Dapena |first=Peter |date=2024-02-15 |title=Headlights are blinding us. Here's why it's mostly an American problem |url=https://www.cnn.com/2024/02/15/cars/headlights-tech-adaptable-high-beams-cars/index.html |access-date=2024-02-15 |website=CNN |language=en}}</ref> Since 2010 some [[Audi]] models with Xenon headlamps are offering a similar system: ''adaptive light'' with variable headlight range control.<ref>{{cite press release |url=http://www.hella-press.com/search_detail.php?text_id=825&archiv=0&language=e&newdir=eng |title=Fascinating light - dynamics through technology and design |publisher=Hella |date=9 February 2010 |access-date=29 May 2014 |url-status=dead |archive-url=https://web.archive.org/web/20140202152126/http://www.hella-press.com/search_detail.php?text_id=825&archiv=0&language=e&newdir=eng |archive-date=2 February 2014}}</ref> In Japan, the [[Toyota Crown]], [[Toyota Crown Majesta]], [[Nissan Fuga]] and [[Nissan Cima]] offer the technology on top level models.

Until February 2022, this technology had been illegal in the US, as FMVSS 108 specifically stated that headlamps must have dedicated high and low beams to be deemed road-legal. An infrastructure bill enacted in November 2021 included language that directs the [[National Highway Traffic Safety Administration]] to amend FMVSS 108 to allow the use of this technology, and set a two-year deadline for implementing this change.<ref>{{cite web|url=https://www.autoblog.com/2021/11/16/adaptive-high-beams-finally-legal/ |title=Adaptive driving beams are finally going to be legal in the U.S. |first=Zac |last=Palmer |website=Autoblog.com |date=November 16, 2021 |access-date=January 3, 2022}}</ref><ref>{{cite web|url=https://www.thedrive.com/news/43146/adaptive-headlights-will-finally-come-to-the-us-thanks-to-the-infrastructure-bill |title=Adaptive Headlights Will Finally Come to the US, Thanks to the Infrastructure Bill |first=Peter |last=Holdereth |website=The Drive |date=November 15, 2021 |access-date=January 3, 2022}}</ref> In February 2022, the NHTSA amended FMVSS 108 allowing adaptive headlights for use in the US.<ref>[https://www.nhtsa.gov/sites/nhtsa.gov/files/2022-02/ADB-Final-Rule-02-01-2022-web.pdf ADB Final Rule] nhtsa.gov</ref> However, the new regulations are quite different from the ones in effect in Europe and Asia and prevent car manufacturers from easily adapting their systems to the US market.<ref name=cnn24/>