The 1966 Mercedes-Benz 300 SE Cabriolet belongs to the W112 family, not the later V8-powered 280 SE 3.5 line. Its historical interest lies in the combination of a formal open body, a six-cylinder engine and equipment such as air suspension—not in any guaranteed financial return.
This is an archive-based model history. Motorz.ca has not inspected or driven an individual example, and the article is not a valuation or purchase inspection.
Identify the model before comparing it
Mercedes-Benz's model record identifies the cabriolet as W 112/3, type 112.023, with main-series production from February 1962 through December 1967. The archive lists a 2,996 cc inline-six with a light-alloy block. From January 1964, its stated output was 170 PS at 5,400 rpm. Those are historical manufacturer specifications, not measurements of a surviving car today. Mercedes-Benz model record
That identity check matters when browsing photographs or advertisements. Similar family styling does not make different engines, model designations or production periods interchangeable. A registration year also needs to be considered alongside the vehicle's own documentation.
Engineering within the W111/W112 family
The manufacturer's broader history explains that the 300 SE coupé and cabriolet combined the corresponding 220 SEb body design with 300 SE technology and additional exterior trim. Its equipment included a four-speed automatic, power steering, air suspension and disc brakes at both axles with a dual-circuit braking system. A four-speed manual became available during the production run. Mercedes-Benz cabriolet history
The archive also records the change to 14-inch wheels and larger disc brakes in 1965. A 1966 example should therefore be understood within the model's evolving specification, rather than described as if every car from the entire production run were identical.
Design details and the later V8 distinction
Mercedes describes additional chrome along the body and around the wheel openings as part of the 300 SE treatment. Those details help explain its visual relationship to neighbouring models, but they are not a substitute for identifying a particular vehicle from its records.
The later 280 SE 3.5 coupé and cabriolet arrived in 1969 with a 3.5-litre V8 and revised frontal styling. Those later features should not be attributed to a 1966 300 SE merely because the cars appear together in a classic-car search. Manufacturer family history
What the production count means
The archive records 708 examples of the 300 SE Cabriolet across its production run. That is not a count of 1966 production alone, nor is it a verified count of cars surviving today. Model record
A small historical production total does not establish a particular car's originality, condition or future value. This guide makes no appreciation forecast and no claim that ownership will generate a return.
Reading the history of a surviving car
Keep three questions separate: what the manufacturer originally built, what documentation identifies the individual car, and what condition that car is in now. The archive addresses the first. Vehicle records and an appropriately qualified specialist are needed for the others.
For Canadian readers, the useful next step is documentary rather than speculative: establish the exact identity before comparing listings, and do not mistake a heritage overview for import, repair or financial advice. See the car-buying hub for broader buying context.
Image disclosure: AI-generated conceptual illustration. Not a photograph or exact specification depiction of a Mercedes-Benz 300 SE.