Another thing Mercedes did to make the vehicle more efficient was to limit the frontal area. The EQX has a frontal area of 2.12 square meters.
Mercedes wouldn’t tell much about the tires , but they do operate near 50 PSI and have a very low coefficient of rolling resistance. Once again, the company is pushing the limits of what it can do while still making a car that people will think looks like a car.Mercedes says that the aero makes up 62% of energy use at highway speeds, weight/rolling resistance makes up another 20%, and that leaves another 18% of energy use that can be attributed to various other things.
The most impressive thing Mercedes was able to accomplish with all of this was a 95% efficient powertrain. This means there isn’t much in the way of frictional or other energy losses as the power goes from the battery to the wheels. This probably required some really good lubricants and many other choices made right .
Even when looks don’t matter at all, and a company should be thinking in terms of dollars and cents, and its employees don’t get any say in how the vehicle looks, we still see many buyers think conventionally instead of looking for ways to save money and increase profits. But, only a slim majority of trucks use things like side skirts and/or trailer tails in the United States, despite the economic losses companies refusing to adopt the technology endure.
This means that if you really want to improve efficiency, aerodynamics is the first place you look, and not the last. It also means that if you must choose between improving aerodynamics and lowering weight, that you should choose to do something about the aerodynamics because it will make a much bigger difference.
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