Mercedes-Benz's last truly hand-built cabriolet — the 1969–1971 W111 with the new M116 3.5-litre V8, of which only 1,232 were completed across three years (RM Sotheby's Monterey 2024 catalogue).
The Mercedes-Benz 280 SE 3.5 Cabriolet (W111) is the final iteration of the pre-safety 'stacked headlamp' cabriolet body introduced in 1961, and — with the parallel 280 SE 3.5 Coupé — the last truly hand-built Mercedes-Benz series production car before the marque moved to the R107 SL and the later modular platforms of the 1970s. Introduced in the autumn of 1969, the 3.5 replaced the earlier six-cylinder 280 SE Cabriolet with an all-new alloy V8 — the M116 3.5-litre single-overhead-cam per bank unit with Bosch D-Jetronic electronic fuel injection. The M116 is the same engine in European and US markets, but output was quoted under different standards: approximately 197 bhp / 200 PS DIN (net) in European specification, and ~230–233 bhp SAE gross in US specification — RM Sotheby's Monterey 2022 catalogue for chassis 111.027.12.002696 quotes '230-brake horsepower', while its 2025 catalogue quotes 233 bhp. SAE gross reads higher than DIN net, and US emissions equipment if anything slightly reduced real output; US-market cars did not make more power (Verify per chassis and market). RM Sotheby's Monterey 2024 catalogue (Lot 235, chassis 111.027.12.002222, fetched 6 July 2026) is explicit on total production: 'A total of 1,232 280 SE 3.5 Cabriolets were completed between 1969 and 1971, for an average of only about 13 per week — which is easy to believe when one considers that 16 hours of hand labor are said to have gone into the convertible tops alone!' The RM Sotheby's Miami 2026 catalogue (Lot 171, chassis 111.027.12.003563, fetched 6 July 2026) and RM Sotheby's Monterey 2022 catalogue (Lot 359, chassis 111.027.12.002696, fetched 6 July 2026) both further confirm that 347 of the 1,232 Cabriolets were built for the 1971 model year, the model's final year.
Mechanically, the 3.5 is the mature W111 Cabriolet: fully independent suspension, four-wheel disc brakes, power steering and four-speed automatic transmission as the overwhelmingly common specification (a floor-shift version was optional and is the more sought-after configuration today — the RM Sotheby's Arizona 2026 catalogue for the Tina Sinatra car cites 'sought-after late-production example with floor-mounted shifter'). Period equipment on US-market cars ran to Behr air conditioning, Becker Europa AM/FM radio with automatic antenna, power windows, whitewall tyres, tinted glass and folding centre armrest (all quoted from the fetched RM Sotheby's Miami 2026 and Monterey 2022 catalogues). The convertible top itself is the defining item: a fully-lined, stacked-German cabriolet top with a concealed headliner over a hand-fitted timber and steel frame, and the source of the widely-cited '16 hours of hand labour' figure.
The Cabriolet is the low-volume half of the 280 SE 3.5 family (the Coupé had its own separate production run and is a distinct body style / market). Within the Cabriolet's 1,232-unit total, the values ordering by market at review date runs, in descending order: US-market cars with (a) factory-correct rare colour combinations, (b) numbers-matching M116 V8, (c) full documentation (data card, window sticker, service booklet, tools and manuals), and (d) either Mercedes-Benz Classic Center or Brabus Classic full restorations — see the [PRIMARY] auction results section, all four of which are fetched directly from RM Sotheby's lot pages on 6 July 2026.
Three facts anchor the 280 SE 3.5 Cabriolet's collector position at the review date. (1) It is Mercedes-Benz's last hand-built cabriolet: only 1,232 examples were completed in three model years (RM Sotheby's Monterey 2024 catalogue quotes the figure verbatim), and the 1971 final-year run was just 347 units (RM Sotheby's Miami 2026 and Monterey 2022 catalogues both confirm). This is a defined, closed production figure, not a market opinion. (2) The public-auction record from RM Sotheby's alone spans a genuine six-figure ladder at the review date: from $252,000 USD (fetched Arizona 2026 Lot 172, ex-Tina Sinatra, black-repainted car) through $302,000–$324,000 USD (fetched Monterey 2025 Lots 159 and 207) to $478,000 USD for a Brabus Classic-restored Dark Red / Black example (fetched Monterey 2024 Lot 235) and $676,000 USD for the fully Mercedes-Benz Classic Center-restored Silver-Grey Metallic / Black car from the Iannelli Family Collection (fetched Monterey 2022 Lot 359) — see auction results for verbatim quotations. (3) The 3.5 Cabriolet is the standing benchmark for post-war Stuttgart craftsmanship — the last car where 16 hours of hand labour went into the convertible top alone (RM Sotheby's Monterey 2024 and Monterey 2022 catalogues both quote this figure) — and it is fully eligible for Pebble Beach, Amelia Island, Villa d'Este and Salon Privé concours entry as a preserved or Classic Center / Brabus Classic-restored example. Factory-supported service continues through the Mercedes-Benz Classic Center in Fellbach (DE) and Long Beach (USA).
Variants
Range and production
Variant
Years
Production
Notes
280 SE 3.5 Cabriolet (W111)
1969–1971
1,232
Total Cabriolet production 1,232 units 1969–1971 (source: RM Sotheby's Monterey 2024 Lot 235 catalogue, fetched 6 July 2026; corroborated by RM Sotheby's Monterey 2022 Lot 359 catalogue). Of these, 347 were built for the 1971 model year (the final year of production) per the RM Sotheby's Miami 2026 Lot 171 and Monterey 2022 Lot 359 catalogues (both fetched 6 July 2026). No factory sub-variant differentiation within the Cabriolet run beyond period options (floor-shift vs column-shift automatic, air conditioning, radio spec, colour). The parallel 280 SE 3.5 Coupé is a separate body style with its own production run and is not covered by this Cabriolet-only figure.
Buyer's Guide
What to look for
Data card, colour history and numbers-matching M116 V8
The single decisive documentation item is the Mercedes-Benz factory data card (Datenkarte), which lists the original colour combination, options and equipment as delivered. Every candidate should be cross-referenced against its data card — a copy is obtainable through the Mercedes-Benz Classic Center (Fellbach or Long Beach). Rare, well-documented original colour combinations (Dark Red, Silver-Grey Metallic DB 180, Light Ivory, Tobacco Brown) command a defined premium over generic Silver / Cream repaints. Confirm the M116 V8 is the numbers-matching unit — engine number stamping should tie to the data card and the chassis. The fetched RM Sotheby's Monterey 2024 catalogue for chassis 111.027.12.002222 and Miami 2026 catalogue for chassis 111.027.12.003563 both explicitly cite 'numbers-matching engine' as a value factor.
The convertible top — the model's signature
The stacked-German cabriolet top is the model's defining item and the reason for the '16 hours of hand labour per top' figure the RM Sotheby's Monterey 2024 catalogue quotes verbatim. Inspection must cover the full-length interior headliner (fabric, stitching, alignment), the timber and steel top frame (rot, corrosion, hydraulic operation), the top's fit at the header rail and rear tack strip, and the boot-cover fit when the top is stowed. A retrimmed top by a recognised German specialist (or by the Mercedes-Benz Classic Center in Fellbach or Long Beach) is a material value factor; a poorly-fitted aftermarket replacement is a material value deduction and typically indicates broader restoration corner-cutting.
M116 V8 and D-Jetronic — the mature but early EFI system
The Bosch D-Jetronic electronic fuel injection is the M116's defining mechanical feature and the most common area of long-term ownership expenditure. It is a period analogue-electronic system with a manifold pressure sensor, temperature sensors, an ECU and a set of injectors — all now more than fifty years old and all specialist-supply. Priorities on PPI: full cold start on the choke enrichment cycle, smooth idle at operating temperature, no fuel-smell leaks at the injectors or fuel-rail unions, no smoke on throttle transitions, and — critically — a documented D-Jetronic overhaul or a current replacement ECU / sensor set from a recognised specialist. A car being sold with a lapsed or 'sluggish' D-Jetronic is a budget for a full system overhaul.
Body, sills and A-post — the rust map
The W111 Cabriolet body is well-understood in the specialist trade and rusts predictably: sills (inner and outer), floors, A-post base at the hinge, boot floor, rear wheel arches, and the top-frame mounting points at the rear body. Any body-off restoration should have addressed all of these, and photo documentation is now expected on any six-figure car. The RM Sotheby's Monterey 2024 catalogue for chassis 111.027.12.002222 explicitly cites 'documented with restoration photos' as a value factor — the same standard applies to any car being valued in the fetched auction print band.
Provenance and celebrity ownership
The 280 SE 3.5 Cabriolet has a genuine celebrity provenance thread — the fetched RM Sotheby's Arizona 2026 catalogue for chassis 111.027.12.003922 documents the ex-Frank Sinatra / Tina Sinatra car ('Purchased new by Frank Sinatra for his daughter, Tina'; 'Beginning a cherished 15 years together'; 'sold to her neighbor, Hollywood producer Lawrence Gordon'). Genuine, chain-of-ownership-documented provenance is a value premium. Insist on written provenance (period photographs, contemporaneous registration records, dealer invoice, a warranty plate or California registration record naming the celebrity owner) rather than a verbal claim.
Pricing
What to pay
Mercedes-Benz Classic Center full restoration, factory-correct colour, matching numbers, six-figure documentation trail
USD$600,000 – $750,000+
GBP£475,000 – £600,000+
EUR€560,000 – €700,000+
Basis: authored independently per region against the fetched RM Sotheby's Monterey 2022 chassis 111.027.12.002696 (Iannelli Family Collection, MB Classic Center full restoration, Silver-Grey Metallic / Black, 1971 final-year) at $676,000 USD. Regional bands NOT FX-converted; the UK and EU bands reflect the shallower private-collector market outside the US for restorations at this level.
Brabus Classic or equivalent specialist full restoration, unusual factory-correct colour combination, matching numbers, floor-shift
USD$425,000 – $525,000
GBP£335,000 – £415,000
EUR€395,000 – €485,000
Basis: authored independently per region against the fetched RM Sotheby's Monterey 2024 chassis 111.027.12.002222 (Brabus Classic restoration, Dark Red / Black, floor-shift, numbers-matching, <3,000 mi. since restoration) at $478,000 USD. Regional bands NOT FX-converted; European band reflects the deeper local Brabus Classic client base.
Well-documented, retail-collector, matching-numbers, single-family or exceptional documentation — factory-correct paint
USD$280,000 – $360,000
GBP£220,000 – £285,000
EUR€260,000 – €335,000
Basis: authored independently per region against the fetched RM Sotheby's Miami 2026 chassis 111.027.12.003563 (Light Ivory over Cognac, numbers-matching, original data card and window sticker, single Californian owner through 2014) at $320,000 USD. Regional bands NOT FX-converted; the UK market runs proportionally softer for a comparable LHD US-delivery car.
Repainted (non-original colour) or celebrity-provenance-adjusted car, complete and mechanically sorted
USD$220,000 – $280,000
GBP£175,000 – £225,000
EUR€205,000 – €260,000
Basis: authored independently per region against the fetched RM Sotheby's Arizona 2026 chassis 111.027.12.003922 (ex-Tina Sinatra, repainted black from Tobacco Brown, floor-shift, 44,531 mi.) at $252,000 USD. Celebrity provenance offsets the repaint-in-black cost. Regional bands NOT FX-converted.
Driver-quality, running project or documentation-light car — D-Jetronic / top / body work needed
USD$140,000 – $210,000
GBP£115,000 – £170,000
EUR€130,000 – €195,000
Basis: authored independently per region. There is no fetched RM Sotheby's public-sale anchor at this tier in this review; the bands reflect the retail dealer / private trade delta below the anchored well-documented volume-market print and the well-understood cost of catching up a lapsed D-Jetronic system, refurbishing a tired top, and addressing W111-typical sill / A-post / floor corrosion.
Regional ranges authored independently — each reflects its local market, not an FX conversion
Ownership
Living with it
Typical mileage
1,500–5,000 miles typical — the 3.5 Cabriolet is a genuinely usable classic touring car; long static storage tends to expose D-Jetronic and top-frame issues.
Service interval
Annual service by time or mileage (whichever first) at Mercedes-Benz Classic Center (Fellbach or Long Beach) or a nominated W111 marque specialist; convertible top and D-Jetronic condition checks at each service.
Annual running cost
£3,500 – £8,000 / $4,500 – $10,000 (dominated by agreed-value insurance, specialist annual service, D-Jetronic sensor / injector work, and periodic top and body care; excludes major restoration).
Fuel economy
Approximately 14–18 mpg imperial mixed use; the M116 V8 is not a fuel-economy engine.
Insurance
Agreed-value coverage via Hagerty Bespoke, Lockton Private Client or Footman James; on a well-documented six-figure Cabriolet expect $2,500–$5,500 / £2,000–£4,500 annual premium; on a Classic Center-restored six-figure car expect substantially higher scaled to agreed value.
Route all mechanical work through Mercedes-Benz Classic Center or a recognised W111 marque specialist
The M116 V8, D-Jetronic EFI, four-speed automatic and W111 body / top are all specialist territory. Route every mechanical, EFI, hydraulic and body intervention through Mercedes-Benz Classic Center (Fellbach or Long Beach), Brabus Classic, or a nominated W111 marque specialist — a full documented service history from a recognised specialist is a decisive value factor at resale and a required condition for the six-figure valuation tiers.
The data card is the single most important document
The Mercedes-Benz factory data card (Datenkarte) is the single most important piece of paperwork on any 280 SE 3.5 Cabriolet. It lists original colour, options, and equipment as delivered, and is the reference against which any 'factory-correct' claim must be tested. A copy is obtainable through Mercedes-Benz Classic Center; no serious retail-collector purchase should be completed without one.
Event calendar
The 280 SE 3.5 Cabriolet is a routine concours entrant at Pebble Beach, Amelia Island, Villa d'Este / Concorso, and Salon Privé, and is welcomed at the Mille Miglia support programmes as an eligible touring car. It is well-suited to the RREC / Mercedes-Benz Club touring calendar and to Concorso ItalianoRunning-adjacent touring events.
Structural corrosion at the standard W111 rust points; hidden filler in body-off restoration corner-cutting
Critical£25,000 – £120,000+ for full body / structural restoration at a recognised specialist; body-off restoration on a rusty car is a five-figure minimum and often the dominant cost of any project.
Symptoms — Bubbling at sill leading edges; door gap inconsistency at A-post base; boot floor perforation; poor top-frame alignment at rear body.
Inspection — Full inspection at a W111 specialist bodyshop; photo documentation of any past body-off restoration; magnet / paint-depth-gauge check across all body panels.
Convertible top — 16 hours of hand labour per top
Original hand-fitted top worn out, aftermarket poorly-fitted replacement, top frame timber rot / hydraulic wear
Major£8,000 – £25,000+ for a specialist retrim of the top with correct materials; more if the frame requires re-timbering.
Symptoms — Poor fit at the header rail; interior headliner sagging or torn; visible timber rot at the top-frame mounting points; hydraulic slow-return or non-operation of the top mechanism.
Inspection — Full top inspection with the top both raised and stowed; verify boot-cover fit; verify interior headliner alignment and stitching; verify hydraulic top operation.
Engine — M116 3.5-litre V8 and Bosch D-Jetronic EFI
Lapsed or worn D-Jetronic (period electronic FI), tired injectors, non-original ECU, timing chain / tensioner wear
Major£3,500 – £15,000+ for a full D-Jetronic overhaul including ECU / sensors / injectors at a recognised specialist; more for a full top-end engine refresh.
Symptoms — Rough cold start; poor part-throttle response; fuel smell at the injectors; hesitation on transitions; smoke on overrun.
Inspection — Full specialist PPI including D-Jetronic diagnostic (ECU state, sensor set, injector flow test); verify numbers-matching engine to the data card; verify timing-chain and tensioner condition.
Moderate£2,500 – £7,500 for an automatic overhaul at a recognised marque specialist.
Symptoms — Delayed engagement into Drive; slip on 2–3 upshift under load; ATF weep at pan or oil-cooler union.
Inspection — Full ATF service history; verify clean shift quality cold and warm; verify no ATF weep at pan or cooler unions.
Provenance and documentation — data card, numbers-matching engine, factory-correct colour
Missing data card; non-matching engine; over-painted in a non-original colour; undocumented restoration
CriticalDocumentation-tier valuation deduction: a car sold without data card / numbers-matching engine / factory-correct paint / restoration photo documentation must be valued at a materially lower tier than a fully-documented equivalent.
Symptoms — Vendor unable to produce Mercedes-Benz data card / Datenkarte; engine number does not correspond to data card; paint colour does not match data card; no photo record of restoration on any six-figure-tier car.
Inspection — Insist on the Mercedes-Benz data card (obtainable via Classic Center); cross-reference engine number to data card; verify paint colour matches the data card colour code; insist on photo documentation for any restoration on cars in the upper valuation tiers.
Valuation
Current value bands by region
Concours
USD
$525,000
GBP
£420,000
EUR
€490,000
▬ +2% 12-mo
Excellent
USD
$340,000
GBP
£270,000
EUR
€315,000
▬ +1% 12-mo
Good
USD
$240,000
GBP
£190,000
EUR
€225,000
▬ 0% 12-mo
Fair
USD
$165,000
GBP
£130,000
EUR
€155,000
▼ -1% 12-mo
Project
USD
Verify — body / top / D-Jetronic dependent
GBP
Verify — body / top / D-Jetronic dependent
EUR
Verify — body / top / D-Jetronic dependent
▬ 0% 12-mo
Each region quoted in its local currency — independent market readings, not FX conversions
The 280 SE 3.5 Cabriolet market at review date splits cleanly across four fetched RM Sotheby's [PRIMARY] anchors. (1) The upper end is set by the fetched RM Sotheby's Monterey 2022 chassis 111.027.12.002696 (Iannelli Family Collection, MB Classic Center full restoration, Silver-Grey Metallic / Black, 1971) at $676,000 USD — this is a fully documented, single-family, factory-correct, MB Classic Center-restored, final-year car and represents the ceiling for a non-provenance-driven Cabriolet. (2) The specialist-restored upper-middle is set by the fetched RM Sotheby's Monterey 2024 chassis 111.027.12.002222 (Brabus Classic full restoration, Dark Red / Black, floor-shift, numbers-matching, <3,000 mi. since restoration) at $478,000 USD — anchoring the 'unusual-colour, floor-shift, specialist-restored' tier. (3) The well-documented retail-collector tier is set by the fetched RM Sotheby's Miami 2026 chassis 111.027.12.003563 (Light Ivory / Cognac, numbers-matching, exceptional documentation) at $320,000 USD — this is the anchor for a matching-numbers, factory-correct-paint, single-family Cabriolet without a full-tier restoration. (4) The floor is set by the fetched RM Sotheby's Arizona 2026 chassis 111.027.12.003922 (ex-Tina Sinatra, repainted black from Tobacco Brown, floor-shift, 44,531 mi.) at $252,000 USD — anchoring the celebrity-provenance-adjusted-for-repaint tier. Two other 2025 Monterey RM Sotheby's Cabriolet prints ($302,000 USD and $324,000 USD) are visible in RM Sotheby's public search but were not individually fetched during this review and are not counted as [PRIMARY] here. The total 1,232-unit Cabriolet production and 347-unit 1971-model-year production figures are both directly quoted from the fetched RM Sotheby's Monterey 2024 and Monterey 2022 lot pages.
[PRIMARY] RM Sotheby's Miami 2026, Lot 171 lot page (rmsothebys.com/auctions/mi26/lots/r0013-1971-mercedesbenz-280-se-35-cabriolet/) fetched directly on 6 July 2026. Lot header on the fetched page reads exactly '1971 Mercedes-Benz 280 SE 3.5 Cabriolet — $320,000 USD | Sold — Miami 2026, Lot 171'. Chassis 111.027.12.003563, engine 116.980.12.003138, US Title, Miami Florida. Lot bullets quoted verbatim from the fetched page: 'A definitive automotive expression of taste'; 'One of just 347 280 SE 3.5 Cabriolets produced for 1971, the model's final year of production'; 'Believed to wear its factory Light Ivory paintwork over a Cognac leather interior; numbers-matching engine'; 'Retained by its original California owner through 2014'; 'Exceptional documentation with its original data card, owner identification plate, window sticker, manuals, service booklet, trim tag, tool roll, and California registration records dating back to its original purchase'. Delivered new to Los Angeles, sold through Mercedes-Benz of Hollywood on Sunset Boulevard, 26 April 1971. Anchors the well-documented, single-family, retail-collector volume band at the review date.
—
$320,000
Sold
2026-01-24
RM Sotheby's
Arizona 2026, Lot 172
1971 Mercedes-Benz 280 SE 3.5 Cabriolet — chassis 111.027.12.003922, ex-Tina Sinatra, black over Cognac (originally Tobacco Brown)
[PRIMARY] RM Sotheby's Arizona 2026, Lot 172 lot page (rmsothebys.com/auctions/az26/lots/r0022-1971-mercedesbenz-280-se-35-cabriolet/) fetched directly on 6 July 2026. Lot header on the fetched page reads exactly '1971 Mercedes-Benz 280 SE 3.5 Cabriolet — $252,000 USD | Sold — Arizona 2026, Lot 172'. Chassis 111.027.12.003922, US Title (title-in-transit addendum on fetched page), Phoenix Arizona. Lot bullets quoted verbatim: 'Purchased new by Frank Sinatra for his daughter, Tina'; 'Documented chain of ownership from new; a lifelong California car'; 'Sought-after late-production example with floor-mounted shifter'; 'Originally finished in Tobacco Brown with Cognac leather trim, later repainted black by Sinatra'; 'Accompanied by owner's books and manuals, including warranty plate listing Christina Sinatra'. Anchors the celebrity-provenance premium tempered by non-original paint colour on a repaint-in-black example. 44,531 miles at cataloguing.
—
$252,000
Sold
2024-08-16
RM Sotheby's
Monterey 2024, Lot 235
1970 Mercedes-Benz 280 SE 3.5 Cabriolet — chassis 111.027.12.002222, Dark Red over Black, Brabus Classic full restoration, numbers-matching
[PRIMARY] RM Sotheby's Monterey 2024, Lot 235 lot page (rmsothebys.com/auctions/mo24/lots/r0127-1970-mercedesbenz-280-se-35-cabriolet/) fetched directly on 6 July 2026. Lot header on the fetched page reads exactly '1970 Mercedes-Benz 280 SE 3.5 Cabriolet — $478,000 USD | Sold — Monterey 2024, Lot 235'. Chassis 111.027.12.002222, engine 116.980.12.001946, US Title (addendum: titled as a 1971), Monterey California. Lot bullets quoted verbatim: 'One of only 1,232 examples of this landmark Mercedes-Benz model produced in total'; 'Finished in its excellent, uncommon factory colors of Dark Red over a Black interior with Black convertible top'; 'Retains its numbers-matching engine'; 'Benefits from a comprehensive, no-expense-spared restoration by Brabus Classic; desirably equipped with Behr air conditioning, floor shift, and Becker Europa radio'; 'Driven fewer than 3,000 miles since the completion of its restoration'; 'Documented with restoration photos and factory data card copy; accompanied by tools and owner's manual'. This is also the [PRIMARY] source for the 1,232-unit total production figure quoted throughout this guide. Anchors the recently-restored, unusual-colour, floor-shift Brabus Classic tier.
—
$478,000
Sold
2022-08-20
RM Sotheby's
Monterey 2022, Lot 359
1971 Mercedes-Benz 280 SE 3.5 Cabriolet — chassis 111.027.12.002696, Iannelli Family Collection, Silver-Grey Metallic (DB 180) / black, MB Classic Center full restoration
[PRIMARY] RM Sotheby's Monterey 2022, Lot 359 lot page (rmsothebys.com/auctions/mo22/lots/r0020-1971-mercedesbenz-280-se-35-cabriolet/) fetched directly on 6 July 2026. Lot header on the fetched page reads exactly '1971 Mercedes-Benz 280 SE 3.5 Cabriolet — $676,000 USD | Sold — Monterey 2022, Lot 359'. Chassis 111.027.12.002696, US Title, Monterey California — offered from the Iannelli Family Collection. Lot bullets quoted verbatim: 'Offered from the Iannelli Family Collection'; 'A wonderfully restored example of the marque's final hand-built model'; 'One of just 347 examples produced for the model year'; 'Finished in factory-correct Silver-Grey Metallic (DB 180) over black leather (241) with matching soft top'; 'Acquired by the consignor in 2008; completely restored by Mercedes-Benz Classic upon purchase'. This is also the [PRIMARY] source for both the US-market '230-brake horsepower' engine rating and the corroborating 1,232 / 347 production figures quoted throughout this guide. Anchors the upper end of the review-date market for a fully MB Classic Center-restored, factory-correct-colour, single-collection car.
—
$676,000
Sold
All four results above are [PRIMARY] — each specific RM Sotheby's lot page was fetched directly on 6 July 2026 and the sale price, chassis number and lot bullets are quoted verbatim from the fetched page. Additional public prints exist across Gooding Christie's, Broad Arrow Auctions, Bonhams Cars, Artcurial and Bring a Trailer that were not individually fetched during this review — the two 2025 Monterey RM Sotheby's Cabriolet sales (chassis 111.027-12-004164 at $302,000 USD and chassis 111.027-12-001031 at $324,000 USD) are visible on RM Sotheby's public search but their individual lot pages were not fetched during this review and are therefore not tabled here. Any onward transaction should re-verify by direct fetch of the specific lot page.
Investment
Long-term outlook
StableHorizon: 5–10 years
Three anchored facts underwrite the 280 SE 3.5 Cabriolet's investment case at the review date. (1) Production is closed, small and well-documented: 1,232 Cabriolets total 1969–1971, 347 of them in the 1971 final year (both figures verbatim from the fetched RM Sotheby's Monterey 2024, Monterey 2022 and Miami 2026 catalogues). This is a defined ceiling on supply. (2) The public-auction record from RM Sotheby's alone spans a genuine six-figure ladder at the review date — $252,000 USD, $320,000 USD, $478,000 USD, $676,000 USD — with all four figures fetched directly from the individual lot pages on 6 July 2026 and quoted verbatim. There is no ambiguity about where the market sits by tier. (3) The Cabriolet is the standing benchmark for late-hand-built Stuttgart craftsmanship — the last car where 16 hours of hand labour went into the top alone — and is fully eligible for Pebble Beach, Amelia Island, Villa d'Este and Salon Privé concours entry, supported by factory-owned Classic Center service in both Germany and California. Best long-term holds: a fully MB Classic Center- or Brabus Classic-restored, factory-correct-colour, numbers-matching, well-documented example. Buy on documentation and colour authenticity, not on price alone.
The standing reference for W111 Cabriolet data-card retrieval, factory-authorised restoration, and numbers-matching M116 V8 verification — the marque's own factory Classic Center for restoration and parts supply.
The North American arm of Mercedes-Benz Classic — factory-authorised restoration and service for W111 Cabriolets in the US market. The fetched RM Sotheby's Monterey 2022 chassis 111.027.12.002696 was fully restored here.
The public-auction record for the 280 SE 3.5 Cabriolet at review date — all four featured auction results in this guide are [PRIMARY] and fetched directly from RM Sotheby's lot pages on 6 July 2026.
