Legacy Metrics

1957 Mercedes-Benz 300 SL Gullwing Coupé

198.040.7500064roadGermany
Engine
3.0L straight-six M198
Colour
Silver grey metallic

A 1957 Mercedes-Benz 300 SL Gullwing finished in Silver Grey Metallic, believed to be among the final twenty Coupes produced before Mercedes-Benz switched to Roadster production. Delivered to a California customer in May 1957, the car subsequently passed to Mercedes-Benz specialist Kent Emigh, who retained it for over 45 years and maintained meticulous workshop records throughout. The matching-numbers chassis, body, and engine are confirmed by the factory data card and Gullwing registry.

Ownership

  1. Auction sale
  2. 1957-05-01 → 1964Factory delivery
    California customer (first owner)
    partial documentation

    Original recipient of the car upon delivery in California; held the vehicle for roughly seven years before selling.

  3. 1964 → 2011Private sale
    Kent Emigh
    full documentation

    Mercedes-Benz specialist dealer and mechanic based in Mountain View, California, who had ties to the original US dealer network. Maintained thorough workshop records covering all repairs, mileage, and servicing over nearly five decades of ownership; commissioned a full engine rebuild in 1965 and a new interior in green upholstery in 1973.

  4. 2011 → 2011Private sale
    Intermediate owner (post-Emigh)
    partial documentation

    Took delivery of newly fabricated belly pans sourced from HK-Engineering in Germany, a project initiated by the prior owner. Tenure appears to have been brief before the current consignor acquired the car.

  5. 2011 →Private sale
    Current consignor
    partial documentation

    Had minor remedial work performed by Paul Russel and Company in Essex, Massachusetts shortly after acquisition; the car has been maintained in largely original condition since.

Competition

No competition history extracted from the catalogue.

Maintenance & restoration

  1. 1965Engine rebuild
    Kent Emigh's workshop

    Full engine overhaul carried out by Kent Emigh in his own workshop to address broken piston rings and bearing damage caused by fuel contamination in the oil.

    Emigh noted no other significant wear beyond the documented faults. Recorded in his personal maintenance log.

  2. 1973
    Bodywork

    Complete interior retrim in green leather including new headliner, carried out at Kent Emigh's direction.

    Recorded in Emigh's maintenance notes as part of his ongoing custodianship.

  3. 2011Service
    Paul Russell and Company

    Minor remedial work and general check-over carried out by noted restoration specialists to ensure the car was fully in order following change of ownership.

    Commissioned by the current owner after acquiring the car; workshop located in Essex, Massachusetts.

  4. Mechanical
    HK-Engineering

    Replacement aluminium belly pans for the underside of the car were fabricated by German 300 SL specialist HK-Engineering to replace originals lost in the 1960s, at a cost of €4,754.50.

    Ordered by Kent Emigh late in his ownership; delivered to and documented by the subsequent owner.

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.