Mercedes-Benz has a long history with aerodynamic vehicles
both in the distant and in the very recent past. The W126 S-class, launched in
1979, had a claimed drag coefficient of 0.36. While Cd is difficult to compare
directly given differences in wind tunnels and even measurement method,
Daimler's current lineup is nevertheless impressive; a version of the CLA is
rated at a mere 0.22.
The Concept IAA takes aerodynamics to an extreme,
sporting a drag coefficient of only 0.19—despite a disadvantageously short
front overhang, large 22-inch wheels on 235/35 tires, and a plug-in-hybrid powertrain
with significant cooling needs. It does so by means of active aero—changing its
shape.
The aerodynamic transformation alters several different
areas. At the rear, eight sections telescope out, extending the car’s length by
more than 15 inches; movable flaps extend out from the front bumper, which also
incorporates a movable louver; and "Active Rims" that change from
dished to flat.
The switch from “design mode” to “aerodynamic mode” happens at
speeds above 50 mph or can be initiated by pushing a button, and it lends the
sharply dropping rear end the appearance of a fighter jet’s.
Aside from its active aero ballet, the Concept IAA, which is
similar in size to an E-class, is significant also because we believe it
provides a glimpse of the next-generation CLS four-door coupe.
While the
greenhouse reminds us of the Audi A7, the futuristic rear end evokes the style
of Italian sports cars of the 1970s and is accentuated by a thin, wraparound
light strip. Meanwhile, the grille and headlights are clearly inspired by the F
015 concept car, which was launched at the Consumer Electronics Show in Las
Vegas earlier this year.
The horizontal light strips actually reference
Mercedes’ classic turn-signal design with their horizontal, three-dimensional
profile.
The interior of the Concept IAA looks surprisingly close to
a production model and strongly resembles that of the current S-class coupe; it
likely gives a fairly accurate glimpse of the soon-to-arrive next-generation
E-class and CLS, as well.
"Optical finger navigation" allows the
driver to keep eyes on the road while operating the vehicle’s infotainment and
assistance systems. Being a concept car, the futuristic Benz naturally must use
some form of electrified powertrain. In this case, it’s a plug-in-hybrid setup
with 279 total horsepower and a 39-mile electric-only range.
Judging from the bold, sports-car-like design of the Concept
IAA, we believe Mercedes-Benz has a specific target in sight: the Porsche
Panamera.
Source
Car&Driver
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