An yet FCA uniformly says around .364 in their press releases (500c).
Yep, frontal area has little to do with cD. The Tesla S and X have the same cD, at .24... but I admit that the 500L's drag is impressive. Where frontal area matters is in total drag... X sqft divided by cD... so a bigger car usually has more drag. (Ironically, there is less total air resistance on the Tesla X than on the Lotus Eloise.)
Of course Tesla might exagerate a bit. While most semi trucks have .5 to .9, Tesla claims their new semi rates at .36, which seems possible when doing a CAD drag test. Tesla did that by removing mirrors (used cameras), tapering the cab, improved cab to trailer fitment, wheel shrouds, and a smoothed trailer. Ford has an even more impressive truck/trailer combo.
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