Picture of emission test sticker on German licence plates.
<a href="https://de.wikipedia.org/wiki/Steschke" class="extiw" title="de:Steschke">Sven Teschke</a>, <a href="https://de.wikipedia.org/wiki/B%C3%BCdingen" class="extiw" title="de:Büdingen">Büdingen</a>
CC BY-SA 3.0 de
<span class="int-own-work">Self-photographed</span>