<p><img class="lead-image-large" src="https://static3.businessinsider.com/image/6024453ccca90200129b78ec-2400/2021 Audi RS 6 AvantKL59.jpg" border="0" alt="2021 Audi RS 6 Avant.KL_59" data-mce-source="Kristen Lee" data-mce-caption="2021 Audi RS 6 Avant."></p><p></p><bi-shortcode id="summary-shortcode" data-type="summary-shortcode" class="mceNonEditable" contenteditable="false">Summary List Placement</bi-shortcode><p>There's always been something about Audis and LEDs.</p><p>Audi was among the firstif not <em>the</em> firstautomakers to adopt light-emitting diode, or LED, daytime running lights. They <a href="https://www.audi-technology-portal.de/en/electrics-electronics/lighting-technology/led-daytime-running-lights#:~:text=The%20daytime%20running%20lights%20of,five%20LEDs%20in%20each%20headlight.">debuted in 2004</a> on the Audi A8 W12 sedan as five LEDs in each headlight. </p><p>The look quickly trickled through the rest of Audi's lineup after that. Soon, everything from the cheaper A4s up had the scintillating detaila sparkly, checkmark-shaped strip of LEDs flanking the signature four rings. Nothing like it had ever been seen before and, for a while, you could pick out an Audi heading toward you from afar just based on that pattern of LEDs.</p><p>In 2009, the Audi R8 V10 <a href="https://newatlas.com/audi-r8-v10-becomes-first-all-led-car/10655/">became the first car</a> fitted exclusively with LEDs. Its headlights, turn signals, and daytime running lights all used the technology, which Audi claimed reduced CO2 emissions and was more efficient than the widely used halogen light bulbs. </p><p>It's now 2021 and nearly everything on the road uses LEDs of some kind, but Audi's still found a way to distinguish itself. Recently, I tested out a 2021 RS 6 Avant<a href="https://www.businessinsider.com/audi-rs-6-avant-review-mercedes-porsche-price-horsepower-wagon-2021-2">read the review here</a>!and stumbled across a neat little light show it puts on when you lock or unlock it. For your viewing pleasure and convenience, I have GIFed the experience below.</p><p><img src="https://static2.businessinsider.com/image/602c1cfe58476300183234e5-1000/lights.gif" border="0" alt="2021 Audi RS 6 Avant." data-mce-source="Kristen Lee" data-mce-caption="Look at this light show!"></p><p>When you unlock the car, the front daytime running lights light up in sequence, almost like a welcome greeting. When you lock the car, the rear lights fade out in sequence, like a curtain closing after a show. </p><p>As far as I can tell, this choice was purely an aesthetic one. It certainly doesn't make the car drive any faster or better. It just gave me, the driver, some small delight in seeing it. There doesn't seem to be any other reason to include such a feature. </p><p>(And before you email me to yell at me that this is old news and I should get with the program: The internet isn't all about <em>you</em>. Not everyone knows this about Audis.)</p><p>But that's not all! I invite you to check out two more things.</p><p>First, the RS 6 Avant's door sills light up in the dark and the car projects "Audi Sport" onto the ground, lest you forget what sort of vehicle you have.</p><p><img src="https://static5.businessinsider.com/image/6024455267d1e300113c559a-2400/2021 Audi RS 6 AvantKL95.jpg" border="0" alt="2021 Audi RS 6 Avant.KL_95" data-mce-source="Kristen Lee" data-mce-caption="2021 Audi RS 6 Avant.">Second, and more practically, the RS 6 Avant's interior lighting includes seat-belt buckle illumination!</p><p>The wagon seats five, so five buckles are encased in a ring of light for you to locate more easily. Anyone who has felt around in the dark for their buckle no longer has to if they're riding in one of these.</p><p><img src="https://static1.businessinsider.com/image/602c1cfd2edd0f001a8d5f0b-900/interior-lights.gif" border="0" alt="2021 Audi RS 6 Avant." data-mce-source="Kristen Lee" data-mce-caption="Strong Tron vibes here."></p><p>The rest of the cabin lighting gives off a very futuristic, <a href="https://www.google.com/search'q=tron+aesthetic&safe=off&rlz=1C5CHFA_enUS911US914&sxsrf=ALeKk01Xw7-hmps-F5KIvflDXwC-M4Tmbw:1613505395760&source=lnms&tbm=isch&sa=X&ved=2ahUKEwiq-NP_l-_uAhXEneAKHarECYgQ_AUoAXoECBkQAw&biw=1089&bih=717&dpr=2">Tron-like aesthetic</a>. If you looked at the interior during the day, you'd see that the light fits perfectly with the minimalist design. </p><p>But those seat-belt buckle indicator lights. That's some real MVP stuff right there.</p><p><strong>SEE ALSO: <a href="https://www.businessinsider.com/audi-rs-6-avant-review-mercedes-porsche-price-horsepower-wagon-2021-2" >Review: The $120,000 Audi RS 6 Avant wagon is the capable performance SUV you want, but better in every way</a></strong></p><p><a href="https://www.businessinsider.com/audi-rs-6-rs6-avant-wagon-features-headlights-interior-lights-2021-2#comments">Join the conversation about this story »</a></p> <p>NOW WATCH: <a href="https://www.businessinsider.com/transgender-activist-former-white-house-intern-sarah-mcbride-isnt-discouraged-by-trump-2018-3">Sarah McBride made history becoming the first openly trans person elected to a state Senate seat. In 2018, she explained why the Trump administration wouldn't discourage her work.</a></p> Click here to read full news..