OK, here's yet another Steinmetz story that's auto industry related (just barely, so I hope it's NOT the answer):
Life magazine in 1965 printed this story on Steinmetz. Jack B. Scott wrote in to tell of his father’s encounter with the Wizard of Schenectady at Henry Ford’s River Rouge plant in Dearborn, Michigan. Ford, whose electrical engineers couldn’t solve some problems they were having with a gigantic generator, called Steinmetz in to the plant. Upon arriving, Steinmetz rejected all assistance and asked only for a notebook, pencil and cot. According to Scott, Steinmetz listened to the generator and scribbled computations on the notepad for two straight days and nights. On the second night, he asked for a ladder, climbed up the generator and made a chalk mark on its side. Then he told Ford’s skeptical engineers to remove a plate at the mark and replace sixteen windings from the field coil. They did, and the generator performed to perfection. Henry Ford was thrilled until he got an invoice from General Electric in the amount of $10,000. Ford acknowledged Steinmetz’s success but balked at the figure. He asked for an itemized bill. Steinmetz, Scott wrote, responded personally to Ford’s request with the following:
Making chalk mark on generator: $1.
Knowing where to make the mark: $9,999.
He also (briefly) had his own electric automobile company - Charles Steinmetz formed the Steinmetz Electric Motor Car Co. in 1920 to designed prototypes of several electric vehicles. The company was in Brooklyn, where it produced an industrial truck and a lightweight delivery car.
The first electrical Steinmetz truck hit the road in early 1922 by climbing a steep hill in Brooklyn as a publicity stunt. In October, the company claimed to have developed a five-passenger coupe.
Steinmetz planned for the company to turn out 1,000 trucks and 300 cars annually, but that was cut short by his death in 1923. The company folded shortly after Steinmetz's death when a lawsuit from a shareholder revealed that the company had misrepresented the number of cars being produced.