If this link works, it may be the best 'look' we're likely to get for this '2016 M-B IAA-esque' car. It's not as accurate as a 'blueprint', but until that day comes, probably all we'll have to 'work' with.
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I brought some Post-Its, and drafting tools to the library, and using the largest, side elevation and plan-view of the car, and using the M-B IAA Height (H),measured:
Length- L=4918.8mm
Width- W=1570.6mm
Height-H=1305mm
Body height-h=1204.6mm
Ground clearance-GC=100mm
Forebody=2446.6mm ( 49.74% of L )
Aft-body=2472.1mm ( 50.26% of L )
Verjungungsverhaltnis- V= 2.052
L/H= 3.7692307
L/h= 4.083333
L/W= 2.686131
L/ square-root of Af = 3.577885574
Frontal area ( Af ) approx. 20.3443 sq-ft ( 1.89 meters-sq ), @ 92.21439% of gross area
21-degree tangent angle ( to the horizon ) @ body's upper trailing edge
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I had nine cars in my archive which have similar 'V', which gave a drag spread from Cd 0.13, to Cd 0.20, with an average of Cd 0.163; indicating more efficient shapes than the GAC's.
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NOTE: Since we're working from photographs, which introduce parallax error due to camera distance from the vehicle, all 'measurements' are 'qualitative' instead of truly 'quantitative.'
Perhaps, in the future, someone will provide a scaled, technical drawing of the car in 'true-length.'
https://www.carscoops.com/2022/04/ga...ns-from-china/