Like the De Ville, the Calais was available as a 2- or 4-door hardtop as well as a "formal-roof" 4-door sedan, which was a hybrid with frameless, hardtop-like windows, but with a pillar between them.

[4] Other standard equipment on the Calais included power brakes; power steering; automatic transmission; cornering lights; dual back-up lights; windshield washers and dual speed wipers; full wheel covers; remote controlled outside rear view mirror; visor vanity mirror; oil filter; five tubeless blackwall tires; heater; defroster; lamps for glove and rear passenger compartments and front and rear seat belts.

Cadillac, always General Motors' technology leader, offered most De Ville options on the Calais, such as Twilight Sentinel and the GuideMatic headlight dimmer.

[7] In 1966, changes included a somewhat coarser mesh for the radiator grille insert, which was became divided by a thick, bright metal horizontal center bar housing rectangular parking lamps at the outer ends.

Cadillac "firsts" this season included variable ratio steering and optional front seats with carbon cloth heating pads built into the cushions and seatbacks.

Prominent styling features were given a powerful frontal appearance with "forward-leaning" front end, long sculptured body lines, and redefined rear fenders that had more than just a hint of tail fins in them.

The squarer cornered grille insert had blades that seemed to emphasize its vertical members and it appeared both above the bumper and through a horizontal slot cut into it.

Rear end styling revisions were highlighted by metal divided taillamps and a painted lower bumper section.

Coupes got a new roofline, inspired by the Florentine show car created for the 1964 New York World's Fair, that gave rear seat passengers added privacy.

New standard Calais features included non-glare rear-view mirror, electric clock, Automatic Climate Controls, padded dashboard, Hazard Warning system, outboard seatbelt retractors and rear cigarette lighters in all styles.

For 1968, grilles had an insert with finer mesh and step down outer section which held the rectangular parking lights slightly higher than before.

On the inside, enriched appointments included molded inner door panels with illuminated reflectors and a selection of 147 upholstery combinations, 76 in cloth, 67 in leather and four in vinyl.

Shoulder belts became standard for both driver and right front passenger seating positions on all Cadillacs (except convertibles) built effective January 1, 1968.

A new front fender treatment similar to the Eldorado helped to emphasize a stronger horizontal design line.

A new ventilation system eliminated the need for vent windows, which provided a longer sleeker look and improved visibility.

The V-shaped grille had an eggcrate style insert and was protected by massive vertical guards framing a rectangular license plate indentation.

A larger Cadillac crest (again, minus the traditional 'V' emblem) decorated the hood face and new optional fiber-optic lamp indicators were placed atop each front fender.

A horizontal beltline molding ran from behind the front wheel housing almost to the rear, stopping where an elliptical bulge in the body came to a point and where thin rectangular side markers were placed above and below the chrome strip.

Long horizontal back-up lamps were set in the bumper, on either side of a deeply recessed license plate housing.

Larger vertical rectangles housed the parking lamps between wide spaced headlamps which had square bezels but round lenses.

Coupes were no longer hardtops, instead sporting large wide "coach" windows giving a thick center pillar look.

A new, two-tiered, "space-aged" curved instrument panel housed a new standard quartz controlled digital clock.

One airbag was located in the steering wheel hub, while the other sat in place of the glove compartment on the lower passenger side of the dashboard.

The glove box was replaced with a rectangular storage compartment, complete with a lockable wood-tone hinged front panel, centrally located under the dashboard.

Although the "ACRS" system (also available on top of the line Buick and Oldsmobile models) saved lives, the option was quite expensive and therefore unpopular with customers.

New standard equipment included the lamp monitor system, power door locks, high energy ignition and steel-belted radial tires.

Other new options included a push-button Weather Band built into the AM/FM stereo signal-seeking radio, plus power passenger and manual driver seatback recliners for 50/50 front seats.