Options now included a bulb horn and a deck to replace the tonneau. The Model B continued in production through 1905 when an alternative tubular front axle was available and the power was advertised as . The Model C was a short-wheelbase car intended to replace the old Models A and B for the summer of 1905. It shared much of the Model B chassis components, but used the hood and radiator of the Model F. The tonneau was detachable, unlike the Model F.  Riding on a wheelbase, Model C was available as either a runabout, priced at $750, or touring car, priced at $850, with a detachable rear-entrance tonneau and optional surrey top. The lightweight runabout weighed just , less than the touring model. Four cylinder engine, see separate article Cadillac Model D  The Model E was released in January, 1905. It was a featherweight runabout model with seating for two, priced at $750 in 1905. It used a wheelbase, splitting the difference between the C and the B/F. No detachable tonneau to make it a four-seater was available. The arched front axle was tubular. The axle was given a truss and added mid-year was a rocker shaft between it and the spring. Single cylinder 98.2 cu. inch engine with an advertised output of 9 horsepower. The planetary transmission which had balanced linkage on its bands provided two speeds and reverse. Drive was taken to the back axle by chain. The Model F was the primary new Cadillac model of 1905. It had a sharper hood and radiator, prompting the update of the Model B (which became the Model C) and even spawning an aftermarket of updates to existing Model A and Model B cars. Models E and F shared the same chassis, though the latter was lengthened by two inches  The Model F was available as either a 4-seater 2-door touring car with side-entrance to the fixed tonneau or a 2-seater delivery vehicle. Both were priced at $950 in 1905. The Model F shared the same wheelbase as had been used on the Model B. Four cylinder engine, see separate article Cadillac Model D  Cadillac's single-cylinder lineup was consolidated into two models for 1906, the short wheelbase Model K and long wheelbase Model M. Priced at $750 for the Model K or $950 for the Model M, 3,650 units were sold that year. The K and M were essentially similar to the Models E and F from 1905 but with updated bodies.