Legacy Metrics

1957 Mercedes-Benz 300 SL Roadster

198.042.7500397roadGermany
Engine
Twin-cam inline-six, ~215 bhp (replacement 1958 unit, rebuilt)
Colour
Fire engine red

A very early-production 1957 Mercedes-Benz 300 SL Roadster, chassis 7500397, originally delivered in Blue over Cream for the U.S. market with a 3.89:1 rear axle. Its documented history traces to Buffalo, New York, where it was owned by Dr. Irwin A. Ginsberg, a noted collector whose cars earned concours honours nationwide. The car subsequently passed through several owners across multiple states before entering a prominent California private collection.

Ownership

  1. Auction sale
  2. Auction sale
  3. Date unknownAcquisition unknown
    Dr. Irwin A. Ginsberg
    partial documentation

    Buffalo-based ear, nose, and throat specialist, wine enthusiast, and noted collector of classic automobiles; his collection earned awards at events across the country.

  4. Date unknown
    Succession of owners in Florida, Ohio, California, and Michigan
    none documentation
  5. Date unknownAcquisition unknown
    Prior California-based private owner
    partial documentation

    Commissioned a full engine rebuild by Mercedes specialist Jim Cosgrove at Oldtimer Restoration Center in Massachusetts, along with rear axle and transmission inspection.

  6. Date unknownPrivate sale
    Prominent California private collection
    partial documentation

    Current custodian; vehicle has been maintained and driven under this ownership.

Competition

  1. 1985
    1985 Pebble Beach Concours d'Elegance
    Best of Show

    Award won by Dr. Ginsberg's collection generally; the prose attributes the Best of Show win to his cars rather than specifying this chassis explicitly.

Maintenance & restoration

  1. Engine rebuild
    Oldtimer Restoration Center

    The car's replacement 1958 engine unit was fully rebuilt by a respected Mercedes-Benz specialist.

    Work carried out under the prior owner. Jim Cosgrove of Oldtimer Restoration Center in Harvard, Massachusetts performed the rebuild.

  2. Inspection
    Oldtimer Restoration Center

    Rear axle and gearbox were examined and inspected as part of the same mechanical overhaul episode.

    Carried out concurrently with the engine rebuild under the prior owner.

  3. Service

    Routine servicing carried out during the current ownership period.

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.