Skip to main content

Mercedes’ Intelligent Aerodynamic Automobile changes shape with the push of a button

If you thought retractable spoilers were cool, you’re going to love Mercedes-Benz’s Intelligent Aerodynamic Automobile, also known as Concept IAA.

The sleek one-off, described by Mercedes as a “digital transformer,” is a showcase of the brand’s aerodynamic prowess, as it boasts a drag coefficient (Cd) of just 0.19. For reference, the Porsche 911 Turbo — which is by no means an open parachute — has a figure of 0.31 Cd.

To accomplish this unprecedented level of slipperiness, Mercedes employed a dynamic, adaptable body structure that literally changes shape with the push of a button. When prompted, eight segments at the car’s rear extend by about 15 inches to reduce turbulence, and special flaps on the bumper activate to improve airflow around the nose and front fenders. Even the wheels — called Active Rims — reduce their indentation to become completely flat, allowing air to slip evenly down the car’s sides without interruption.

“The Concept IAA applies intelligent innovations to resolve the conflicting aims of functionality and aesthetics and shows that we still have plenty of ideas on how to achieve further improvements in efficiency,” said Prof. Dr. Thomas Weber, Head of Mercedes-Benz Cars Development.

Left to its own devices, the car will undergo this transformation automatically when it reaches 80 kph (49.7 mph)

Whatever configuration the Concept IAA is in, the vehicle’s minimalist design is certainly no chore to look at. Outside, the four-door boasts a classic sports car silhouette, with a long hood, flared wheel arches, and a set-back greenhouse presenting a classically athletic profile. Inside, the ultra-modern IAA takes cues from the S-Class with its two-part screen, but adds unique cut glass and aluminum finishes to embody the luxury sedan of the future.

The Concept IAA is currently being showcased at the 2015 Frankfurt Motor Show.

Andrew Hard
Andrew first started writing in middle school and hasn't put the pen down since. Whether it's technology, music, sports, or…
8 key things you need to know from Apple’s WWDC 2025 event
From a fresh look and updated names, to new features, more intelligence and live translation
iOS 26, iPadOS 26 and macOS 26 shown on devices.

The WWDC 2025 keynote ran for just over an hour and a half. For those of you who don't fancy sitting through the whole presentation, we've pulled out the key things you need to know from the latest Apple event.

1. Welcome to the 26 club

Read more
Tesla’s robotaxi service is almost here, but it’s not the car you want to see
Silver Tesla Model Y Juniper side

Tesla chief Elon Musk has said that the automaker is aiming to launch its robotaxi service on June 22, in Austin, Texas.

“Tentatively, June 22,” Musk said in a post on X on Tuesday, adding: “We are being super paranoid about safety, so the date could shift.”

Read more
I tried an e-bike for the first time and now I’m hooked
It’s not about being a 'bike person', it’s about finding small upgrades to everyday life
A woman sitting on the Aventon Pace 4

Before this year, I’d never even touched an e-bike before, and the thought of riding one was never on my radar. With life already in constant motion thanks to two toddlers, biking wasn’t something I ever considered adding to the mix.

I’d always assumed e-bikes were for hardcore commuters or serious cyclists, not someone like me. I wasn’t looking for a big lifestyle change. I just wanted a quicker way to get to the park so we’d have more time to play before dinner.

Read more