Legacy Metrics

1955 Mercedes-Benz 300 b Cabriolet D

186.014.5500359roadGermany
Engine
3.0L inline-six OHC, twin dual-barrel downdraft carburetors, 7.4:1 compression

A rare 1955 Mercedes-Benz 300 b Cabriolet D (W186, chassis 00359), one of only 59 produced that year, this car served as the official factory show exhibit at the 1955 Toronto National Motor Show. It has long been associated with Konrad Adenauer, the first West German Chancellor, reportedly serving as a chauffeur car for his visits to New York via the German Consulate. Retained by its third owner for approximately 57 years, the car remains largely original in interior, trim, and paintwork.

Ownership

  1. Auction sale
  2. → 1964Acquisition unknown
    Second owner
    partial documentation

    Owner placed a classified listing in the New York Times in 1964 to sell the car; correspondence from this owner survives including a letter to his mechanic regarding a 1963 tune-up bill.

  3. 1964 →Private sale
    Third and long-term female owner
    full documentation

    Kept the car in largely unrestored condition for approximately 57 years; engaged noted restorer Jim Capaldi for ongoing servicing over the final 30 years of her ownership, with invoices on file.

  4. Date unknownAcquisition unknown
    German Consulate in New York City
    partial documentation

    Car reportedly served as a diplomatic vehicle, used to chauffeur Chancellor Adenauer during his visits to New York and nearby areas in the mid-1950s.

Competition

No competition history extracted from the catalogue.

Maintenance & restoration

  1. 1963
    Service

    A tune-up was carried out, documented in correspondence between the second owner and his mechanic.

    A surviving letter from the second owner humorously protests the $92 cost of this service.

  2. Service
    Jim Capaldi

    Ongoing maintenance and servicing performed over approximately 30 years, with invoices on file.

    Capaldi is described as a noted restorer who handled the car's upkeep during the long-term current ownership.

  3. Mechanical
    Jim Capaldi

    Fuel tank restored to working order, an electric fuel pump fitted, and both carburetors rebuilt to return the engine to proper running condition.

    This work represents the most recent service episode documented in the invoices file.

  4. Bodywork

    Repaint applied to the front end of the car, blended to closely match the surviving original paintwork on the rest of the body.

    The remainder of the exterior retains what is believed to be over half of its original factory paint.

Are you the owner of this car?

This car's public record is built from its auction and competition history. Register your ownership and privately add your own records to make it a verified Legacy Metrics passport — provenance that backs your car's value at sale and gives your insurer evidence to price against. Roy reviews and verifies every registration personally.

Each chassis record is compiled from public auction archives and links to its source material. Ownership, competition and maintenance entries are extracted from those catalogue listings by an LLM, which can make mistakes — please contact us with any corrections. The summary is Legacy Metrics’ own writing; we do not reproduce catalogue text.

“Full” and “partial” documentation labels indicate how well each entry is corroborated in the underlying sources, not an audit of the car’s physical paperwork. Names of recent or living owners are withheld for privacy.