an option, producing 290 hp. A three speed manual transmission was standard, while the optional 3-speed automatic adopted pushbutton shift controls that was not related to the ill-fated electric solenoid controlled Teletouch used by Edsel. Mercury offered mechanically activated pushbutton transmission controls in response to the Chrysler TorqueFlite pushbutton controls introduced in 1956. The Mercury control buttons initially offered five buttons and was called "Keyboard Control", with a long button on top labeled "Drive" with four smaller buttons below labeled "Brake", "Neutral Start" which would allow the engine to start with the ignition key, "Hill Control" and "Reverse" with later versions separating the "Drive" button to "Performance" and "Cruising" for 1958 and relabeled as "Multi-Drive". A separate push/pull lever was included below the control buttons labeled "Park" which would lock out the control buttons until the Park button was pulled to release it. The control panel was installed to the left of the steering wheel. In 1959 the keyboard control was discontinued and used a steering column gear selector lever. For 1958, the Montclair remained the mid-level Mercury, now slotted below the newly introduced Mercury Park Lane, with the Turnpike Cruiser returning as a Montclair trim level (including its larger windshield and retractable rear window). The 312 V8 was replaced by a 383 cubic-inch V8, producing 330 hp; as a special-order option, a 430 cubic-inch "Super Marauder" V8, producing 400 hp (the first American series-produced engine to reach that output level) was offered. Third generation (1959-1960) The Mercury model line underwent a ground-up redesign for 1959, as the Montclair expanded to a 126-inch wheelbase. Following the cancellation of the Edsel Corsair and Edsel Citation (which shared bodies with Mercury), the division used a body and chassis exclusive to the division (for the first time since 1940). The Phaeton and Turnpike Cruiser trims were discontinued, along with the convertible, with the Montclair model line pared down to a four-door pillared sedan, along with two-door and four-door hardtops. Across the Mercury line, hardtops were styled as a Cruiser semi-fastback, including a larger compound-curve rear window (replacing the retractable design of the Turnpike Cruiser). The Super Marauder V8 was discontinued, with the 383 V8 (retuned to 322 hp) becoming the only engine. In another change, automatic transmissions became standard on the Montclair; while the pushbutton "Keyboard Control" was retired (in favor of a conventional column-mounted shifter), the Multi-Drive dual-range transmission remained an option.