Car Collector International
Classic · 1928–1932

Mercedes-Benz SSK

Ferdinand Porsche's supercharged short-chassis monster — the most fearsome sports car of the late 1920s.

Car Collector International Editorial
Studio three-quarter front view of a deep-red Mercedes-Benz SSK open two-seater with polished exposed exhaust pipes down the bonnet side, wire wheels, mesh grille and Mercedes-Benz badge, on a plain grey backdrop.
Overview

Why this car matters

The SSK ('Super Sport Kurz' — short) was developed by Ferdinand Porsche during his Mercedes-Benz years as a shorter-wheelbase, lighter and more powerful version of the S/SS sports tourer. Power came from a 7,065cc six-cylinder engine with a Roots-type supercharger that engaged under hard throttle, producing 200–250 bhp depending on tune. The SSK won the 1929 Tourist Trophy with Caracciola driving in heavy rain, and the related SSKL took the 1931 Mille Miglia. Production was tiny — approximately 33 cars (plus a handful of SSKLs).

Among the most charismatic and valuable pre-war sports cars ever built — Porsche-engineered, supercharger-howling and finite.

Variants

Range and production

VariantYearsProductionNotes
SSK1928–193233Short-chassis supercharged sports car.
SSKL1931–1932Not separately recordedLightened racing version; very few built.
Collector Variants

Limited & special editions

The models below represent the most significant limited and special edition variants — factory-produced cars that command meaningful premiums over standard examples and warrant specific attention from serious collectors.

Mercedes-Benz SSKL ('Super-Sport Kurz Leicht') · 1931

Approximately 7
Distinguishing features
Lightened racing development of the SSK with extensively drilled chassis (~125 kg saving) and uprated supercharger (300 hp on Rennkompressor). Won the 1931 Mille Miglia in Caracciola's hands.
Value premium
Multi-tens-of-millions for original chassis; very few survive.
Inspection points
Mercedes-Benz Classic Heritage documentation essential; chassis perforation pattern is highly specific.
Authentication
Original SSKLs are exceptionally rare; numerous SSK-to-SSKL replications exist. Only chassis on the Mercedes-Benz Classic register are genuine.
Buyer's Guide

What to look for

Provenance and originality

For pre-war and vintage cars such as the Mercedes-Benz SSK, provenance is paramount. Chassis and engine number matching, period coachbuilder records, factory build sheets where available, continuous ownership documentation, original handbooks and any competition or concours history are the foundation of value. Verified original SSK identity, period race history, original Mercedes-Benz coachwork, and Daimler Classic Centre documentation.

Mechanical inspection priorities

The supercharged six is extremely stressed; the blower engages under hard throttle and rebuilding it is six-figure work. Verify a recent specialist rebuild and oil pressure under load. A pre-purchase inspection by a recognised marque specialist should include compression and leak-down testing, magneto and ignition checks, chassis straightness and frame survey, axle and steering wear assessment, brake system review (mechanical or hydraulic per period), and an extended road test on varied terrain to expose carburation, cooling and gearbox issues that only emerge under sustained running.

Body, chassis and originality of coachwork

Pre-war coachwork is rarely truly original after a century of use. Establish whether the body is original to the chassis (period photographs, build records, coachbuilder plates), whether it has been re-bodied at any point, and the standard of any restoration. Quality of timber framing, ash health, panel beating and paint depth are all critical. Concealed structural rot, re-bodies presented as original, and 'tribute' cars built on later or unrelated chassis must be priced accordingly.

Specification and event eligibility

Verified original SSK chassis with continuous history; the market distinguishes sharply between original cars and later-built 'evocations' on related S or SS chassis. For vintage cars, event eligibility — Mille Miglia, Goodwood Revival, Pebble Beach, VSCC events, Le Mans Classic — can underwrite a substantial proportion of market value. Verify FIA/FIVA papers, period race history where claimed, and the car's standing with the relevant marque registry before purchase.

Ownership

Living with it

Typical mileage
300–2,000 miles typical for vintage use; rally cars higher
Service interval
Annual full service; pre-event check before any rally or tour
Annual running cost
$8,000 – $35,000 depending on use, storage and event programme
Fuel economy
10–18 mpg typical; heavy carburetted engines run rich
Insurance
Use a specialist agreed-value vintage policy with declared value reviewed annually. Premiums reflect declared value, storage, event use and driver experience with pre-war machinery.

Maintenance planning

Vintage cars require disciplined preventive maintenance: lubrication regimes, magneto service, carburettor synchronisation, brake adjustment, and timber and trim conservation. A car used regularly and serviced annually by a specialist will outlast a stored example neglected for decades.

Specialist access and parts

Mercedes-Benz Classic Centre and a small number of pre-war specialists worldwide; parts are fabricated for each car as required. Confirm the availability of marque specialists, period-correct fasteners, coachwork trim, instruments and tyres before committing. A car requiring fabricated one-off parts will absorb time and cost that a similar example with active specialist support will not.
Common Problems

Known issues by system

Engine

Worn bearings / low oil pressure

Major$50,000 – $250,000+ (full rebuild)
Symptoms — Low hot oil pressure, knocking on overrun.
Inspection — Hot oil pressure test; compression and leak-down; sump inspection.
Body / Chassis

Ash frame rot / timber decay

Major$20,000 – $80,000+ (full re-frame)
Symptoms — Door sag, panel misalignment, soft timber at sills and door pillars.
Inspection — Probe timber framing; lift trim where possible; specialist coachwork survey.
Brakes

Mechanical brake imbalance / hydraulic seal failure (later cars)

Moderate$3,000 – $12,000
Symptoms — Pull under braking, soft pedal, fluid leaks.
Inspection — Static and dynamic brake test; inspect linkages, drums and master cylinder.
Electrical

Period wiring degradation / dynamo failure

Moderate$2,500 – $8,000 (rewire)
Symptoms — Intermittent lights, charging issues, smell of hot insulation.
Inspection — Inspect loom for cracked insulation; test dynamo output and regulator.
Auctions

Recent results

DateAuctionCarMileageResult
2024-11-23
RM Sotheby's
Munich
1929 710 SSK Roadster (Lot 159)
€1,580,000
Sold
Investment

Long-term outlook

Blue ChipHorizon: 10+ years

Among the most desirable pre-war cars ever built — Porsche provenance, supercharged engineering and tiny production.

Our view, not advice. This section is Car Collector International's editorial judgement on where this model sits in the collector market, based on the production, specification and market data set out in this guide. It is not a recommendation to buy or sell and it is not investment advice. Values can fall as well as rise.

Recommended

The trusted network

Specialists

  • Mercedes-Benz marque specialist
    View →
    UK / Europe
    Mercedes-Benz SSK restoration, mechanical service and originality reviews.
  • Pre-war coachwork specialist
    View →
    International
    Timber framing, ash conservation, panel beating and period-correct paint for pre-war coachwork.
  • Concours preparation studio
    View →
    International
    Concours preparation, detailing and event support for pre-war and vintage cars.
  • Hagerty
    View →
    USA / UK / EU
    Agreed-value collector insurance specialising in pre-war and vintage cars.
  • Lockton Performance
    View →
    UK / EU
    Specialist agreed-value cover for significant pre-war and competition cars.

Storage

  • Windrush Car Storage
    View →
    London & Cotswolds, UK
    Climate-controlled storage and collection management for pre-war and classic cars.
  • AutoVault
    View →
    Essex, UK
    Dehumidified storage at 55% RH in purpose-built sealed buildings, with maintenance programmes and individual motor-trade insurance cover.
  • Classic Car Club Manhattan
    View →
    New York, NY
    Secure urban storage for collector and pre-war cars.

Transport

  • CARS UK
    View →
    UK & Europe
    Enclosed concours and event transport for pre-war and vintage machinery.
  • Reliable Carriers
    View →
    USA (national)
    Enclosed coast-to-coast transport for pre-war American and European cars.
  • FERRLOG
    View →
    Italy / Europe
    Air-ride enclosed transport for Italian and European collector cars.

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The valuation figures in this guide are for research purposes only and do not constitute financial or investment advice. See our full disclaimer.