Sustainable Biz #8 - Magazine - Page 22
are a low-slung front section with side air
curtains, front splitters ahead of the wheels,
and a long, wide wide rear with diffuser and
side blades.
Numerous Individual Measures Delivering
an Outstanding Drag Coefficient of
0.19 Through focused work on numerous
details, the already very good drag
coefficient could be further improved.
Individual measures such as optimized
aero-mirrors, an extended diffuser, and
the rear spoiler lip have further improved
the aerodynamics. Overall, the Cd value of
the CONCEPT AMG GT XX during the
extreme test in Nardò was only 0.19, despite
wide high-performance tyres.
This excellent value had a direct impact on
the long-distance drive: At the speeds driven
at Nardo, an improvement of just 1 point
(Cd reduced by 0.001) has a similar effect
on range and efficiency as a weight saving of
around 90 kilograms.
Refinement did not stop at the underbody:
A specifically developed underbody
contour ensures a balanced aero-balance
and thus the optimal contact pressure
with maximum efficiency. It creates the
so-called Venturi effect. This reduces
rear-axle lift with minimal impact on drag,
providing extremely high driving stability.
The active rear spoiler could remain
retracted during the extreme test in Nardò
because the CONCEPT AMG GT XX
22
“Unlike conventional
EVs, which typically
need to reduce output to
reach optimal component
temperatures, the
CONCEPT AMG GT
XX delivers full power at
all times.”
generates sufficient downforce through its
sophisticated aerodynamics alone.
New 20-inch wheels with carbon-fibre
claddings The wheels were also newly
developed for the mission in Nardò. The
20-inch dimension offers the optimal
compromise between high driving stability
and low air resistance. The aero-carbon
claddings used in the aluminum wheels
differ on the front and rear axles. The slats
direct the air from the outside to the inside
on the front axle, while on the rear axle the
air is pumped from the inside to the outside.
This improves the air flow around the
S U S TA I N A B L E B I Z M A G A Z I N E
OCTOBER 2025
vehicle and increases driving stability with
lower air resistance than fully closed wheels.
Brake cooling could be neglected because
deceleration was almost entirely done
via recuperation during the drive, up to
the pit stop. The car used Michelin highperformance tires, which were developed to
combine top performance with maximum
efficiency.
High charging performance and short
charging times thanks to a newly developed
charging station by Alpitronic In addition
to high on-track speeds, high charging
speeds were a key success factor during the
endurance test. The CONCEPT AMG GT
XX charged at an average of around 850
kW in Nardò, thanks to a newly developed
Alpitronic charging station and the
temporary High-Power Charging Hub.
To achieve high charging performance and
short charging times, the team installed
its own High-Power Charging Hub at the
test site, including medium-voltage power
lines, transformers, and charging stations.
The project drew on the expertise of the
Mercedes-Benz Charging Unit, responsible
for building the global Mercedes-Benz
High-Power Charging network. The
construction of the temporary High-Power
Charging Hub in Nardò was also completed
in record time: from the building permit
application to commissioning, it took
just under three months. The new grid
