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Only 400 were built in 1957. They were expensive, hand-built, limited edition car with luxury features. -
The car's air suspension showed difficulties that were troublesome in practice. They were replaced with cheaper conventional coil springs.
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New mechanical items were introduced, featuring "scientifically engineered" drainage systems and shock absorbers.
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The Cadillac was now equipped with standard equipment such as power brakes, power steering, automatic transmission, outside rearview mirrors, oil filters, and power vent windows.
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The company outfitted the Cadillac with a standard front seat belt, which would be mandated by federal law just five years later in 1968.
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A fiber-optic "lamp monitor" system proved useful, as it displayed the functionality of the headlamps, parking lamps, tail lamps, brake lights, and turn signals.
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The lightweight engine used in the Cadillac was replaced due to failure of the intake manifold gasket and aluminium oil pump failure.
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The last Cadillac Eldorado was assembled and donated to the Cadillac Museum