Autoblog and Yahoo may earn commission from links in this article.This 2017 Mercedes-Benz S550 Cabriolet is flagship open-top luxury at a deeply depreciated price, a black-over-beige drop-top with a twin-turbo V8 and a features list that reads like the entire Mercedes options catalog. It showed around $150,000-plus on its window sticker when new and now sits in the mid-$20,000s with days left on the auction. As one of the last full-size Mercedes convertibles, it offers enormous car for the money, and the value equation here is refreshingly clear.2017 Mercedes-Benz S550 CabrioletBring a TrailerWhat it's worth right nowClassic.com shows the A217 S550 Cabriolet with a recorded high of $77,500 back in 2022 and a low of $34,000 in mid-2025, reflecting a steep and steady depreciation curve from an original sticker around $150,000 to $157,000. Current retail listings span a wide range, from roughly $48,000 for a clean higher-mileage dealer car up to around $99,900 for the very finest, lowest-mileage examples, with condition, mileage, and options driving the spread.AdvertisementAdvertisementThis car sits in the sweet spot of that curve: a 35,000-mile, well-optioned, clean-Carfax example being sold at auction, where results typically land below retail dealer asking prices. The heavy factory options list and the desirable black-over-beige color combination help, while the disclosed cosmetic items below keep it honest.2017 Mercedes-Benz S550 CabrioletBring a TrailerGiven the mileage, the specification, and the clean history, I would call fair value roughly $30,000 to $42,000. The current $26,767 bid with eight bids and four days remaining is right at the lower edge of that and climbing, and multiple commenters calling the car a steal suggests real interest as the auction runs.Condition and detailsThe equipment list is the headline, and it is comprehensive. This S550 Cabriolet is finished in black over a two-tone designo beige interior and carries 20-inch AMG multi-spoke forged wheels, dynamic LED headlights, a Burmester sound system, heated and ventilated massaging front seats, heated rear seats, a heated steering wheel, Airscarf neck warmers, the Aircap anti-turbulence airfoil, a head-up display, a surround-view camera, soft-close doors, Keyless Go, and Airmatic air suspension. The current owner bought it in 2019 and added about 29,000 of the 35,000 miles, and an oil change was performed in October 2025. The seller reports it has been almost exclusively dealer-serviced per the Carfax and kept garaged, and the sale includes both keys and the owner's manual.2017 Mercedes-Benz S550 CabrioletBring a TrailerThe disclosures are handled openly, which is what you want on a used flagship. The listing highlights scratches in the gallery, curb damage on the 20-inch wheels, and an imperfection on the seat upholstery shown up close. In the comments, the seller also disclosed that the car has a new windshield fitted because the original had a slight crack, and confirmed it is an OEM-spec piece with an invoice available on request, though a bidder specifically asked whether the replacement is a genuine Mercedes windshield or aftermarket, which is worth confirming in writing. A question about whether the tool kit and jack are present was also raised, so verify the accessories are complete.2017 Mercedes-Benz S550 CabrioletBring a TrailerThe rest is standard diligence for a complex, depreciated German flagship. The Carfax is reported free of accidents, but these cars are expensive to maintain out of warranty, and the Airmatic suspension, the folding-top mechanism, and the electronics are the areas that get costly with age. Confirm the top cycles correctly and all the many features function, check tire age, and factor in that upkeep will be firmly in S-Class territory. A pre-purchase inspection is well worth it despite the modest purchase price, precisely because the repair costs are not modest.2017 Mercedes-Benz S550 CabrioletBring a TrailerAdvertisementAdvertisementThe offerSpecificationDetailMakeMercedes-BenzModelS550 Cabriolet (A217)Year2017Mileage35,000EngineTwin-turbocharged 4.7-liter V8Power449 horsepower, 516 lb-ftTransmissionNine-speed automaticDrive typeRear-wheel driveExterior colorBlackInterior colordesigno BeigeCurrent bidUSD $26,767Interested in this car? View the listing here.What makes the S550 Cabriolet uniqueThe A217 S-Class Cabriolet, introduced for 2017, was a genuine event: the first full-size four-seat Mercedes convertible in decades, reviving a body style the brand had not offered since the early 1970s. Built on the W222 S-Class platform, it paired that car's technology and craftsmanship with a fully open cabin and clever touches like the Airscarf neck-level heating and the Aircap airfoil that reduced buffeting. The S550 used the twin-turbocharged 4.7-liter V8 with 449 horsepower, giving this large, luxurious convertible genuinely effortless pace to match its serene ride.2017 Mercedes-Benz S550 CabrioletBring a TrailerThat rarity is part of the appeal now. As a commenter noted, Mercedes built the S-Class Cabriolet only from 2017 to 2021, with worldwide production estimated in the low tens of thousands against hundreds of thousands of S-Class sedans over the same span, making it a comparatively uncommon car. Values have fallen dramatically from the original six-figure stickers, which is exactly what makes a clean, well-optioned example so much car for the money today. The trade, as with any aging flagship, is that maintenance costs remain resolutely S-Class, so these reward buyers who want the experience and have budgeted for the upkeep rather than those chasing a cheap luxury car.My takeThis is a lot of flagship convertible for the money, and the combination of low-ish mileage, a heavy options list, a desirable color combination, and a clean Carfax makes it one of the more appealing S550 Cabriolets to come up. My fair-value call is $30,000 to $42,000, and I would be comfortable being active into the middle of that for a car that inspects cleanly and whose disclosed items check out.AdvertisementAdvertisementThe buying advice is to verify the details and respect the running costs. Confirm the replacement windshield is genuine Mercedes as the seller indicates, check that the tool kit and accessories are complete, and get the service records and a pre-purchase inspection with attention to the Airmatic suspension, the folding top, and the electronics. Budget realistically for S-Class upkeep. Handle those, and the current $26,767 bid reflects a market that is, correctly, treating this as a tremendous amount of last-of-its-kind luxury for the money.Disclaimer: This post is for informational purposes only. We are not a dealership or broker. All vehicle specifications, pricing, and availability are subject to change without notice. We are not responsible for typographical errors, omissions, or the accuracy of the provided information. Please verify all details directly with the seller.Autoblog aims to feature only the best products and services. If you buy something via one of our links, we may earn a commission.This story was originally published by Autoblog on Aug 3, 2026, where it first appeared in the Car Buying section. Add Autoblog as a Preferred Source by clicking here.