Mercedes-Benz S-Class Coupe / CL (C140)

60 sales analyzed · 18 topics from real Bring a Trailer & Cars & Bids comments.

“The W140 coupe represents the zenith of pre-Chrysler merger Mercedes-Benz over-engineering.”TurtleGarage · Dec 18, 2021 at 12:35 PM

• Biodegradable wiring harness on the early (1992-1995) carsmechanical
  The pre-1996 cars used a biodegradable insulation that cracks and crumbles, taking out engine and injector wiring and even reaching into the throttle actuators. Commenters agree the updated harness fixes it permanently and is a relatively cheap part, though labor and the shrinking supply worry buyers. …
• The M120 6.0 V12: robust, under-stressed, and long-livedmechanical
  Owners repeatedly describe the M120 V12 as one of the best production twelves ever, extremely under-stressed, and good for very high mileage when maintained. Multiple owners report 100k-200k-mile examples still strong; the internals are considered essentially bulletproof, with problems coming from the surrounding luxury systems rather than the engine itself. …
• M119 V8 plastic cam oilers and start-up tickingmechanical
  The M119 V8's plastic cam oilers are the engine's signature weak point, producing a threaded ticking noise on cold start when they crack. Owners treat this as a cheap, easy preventive job replacing them with metal units, and consider it a point of information rather than a value detriment. …
• V8 CL500 versus V12 CL600: the ownership choicebuying
  Opinion splits sharply on which drivetrain to buy. V8 advocates argue the lighter nose gives better handling balance and cheaper, easier maintenance, making the CL500 the true enthusiast pick. …
• Naming confusion: S-Class Coupe versus CL, and the 1996-97 switchoverhistory
  Mercedes created the CL-class designation in 1996 for the rest of the world but North America kept marketing the car as the S-Coupe (S500/S600) through 1997, adopting CL500/CL600 only for 1998-99. This produces cars where the trunk badge, build sheet and VIN decoder disagree, especially early-build 1997s. …
• Rarity and disputed production numbersmarket
  The C140 is low-production (roughly 26,000 worldwide versus ~75,000 of the preceding C126), and the final 1999 US coupes especially are rare. Actual figures are hotly disputed: long-circulated numbers of '19 V8 / 15 V12' were debunked in favor of ~777 S500 and ~180 S600 for US MY1999, while individual owners tracking VINs cite still different counts. …
• Vacuum-operated soft-close doors, trunk and central lockingmechanical
  Central locking and the soft-close (pull-in) doors and trunk run off vacuum, served by two pumps (a PSE pump under the rear seat and a CA pump in the trunk) plus door actuators that leak with age. Failures are common but often resolved by a fuse reset or actuator/pump replacement, and owners keep spares. …
• Coupe door latches ("locks") are NLA and labor-intensiveownership
  The driver's-side coupe door latch (technically a 'lock') wears out with use and is effectively impossible to buy new, differing from the sedan and between pre- and post-1996 cars. Replacing one means largely disassembling the door, a job owners quote at around eight hours and well over a thousand dollars in labor, on top of finding a good used part. …
• Hydraulic self-leveling (SLS) and ADS suspensionmechanical
  The V8 coupes typically have only a rear hydraulic self-leveling system with conventional front struts, while four-wheel ADS was standard on the 600s and uncommon on the V8s. Accumulators are a periodic maintenance item (owners cite roughly $500 at an indie), and a full hydraulic ADS rebuild with NOS parts can run into the thousands. …
• Running costs: budget several thousand a year, and sort it or sufferownership
  The consensus maintenance budget for a driven car is roughly $5k a year (some owners say $2-3k for a lightly used one), reflecting the sheer number of complex luxury systems. The repeated theme is that a properly serviced 140 is trouble-free while a neglected one is a nightmare, and that deferred maintenance, not fragility, is what bankrupts owners. …
• Market values: brutal depreciation, a bottom near $6-10k, then a firmingmarket
  Cars that cost roughly $140k new (about $265k in 2022 dollars per one owner) fell to well under $10k, and 'holy depreciation' bargains appear throughout the threads. Prices peaked around 2021-22 (low-mile 600s at ~$40k) then softened, with sellers noting the ridiculous 2021-22 numbers are gone. …
• Bruno Sacco styling: polarizing then, appreciated nowcosmetic
  The C140 is framed as the final S-Class styling statement from Bruno Sacco, and owners increasingly see the big-body coupe as a modern classic. The design remains polarizing: some find the proportions and clips bulbous, and color opinions run strong (white divides people), but the 'so ugly they're beautiful' presence is a recurring source of pride. …
• Pillarless profile and rear-seat comfortdriving
  The true pillarless hardtop design, with all side glass down, is a defining feature owners specifically buy the car for. The rear seat is praised as genuinely comfortable and usable, unlike a 2+2, though access is awkward; the coupe is described as a far more personalized experience than the sedan. …
• Driving character: high-speed grand tourer and 'road tank'driving
  The car is celebrated as a supremely composed long-distance cruiser that pulls like a freight train and stays serene and quiet at illegal speeds, feeling more nimble than its weight suggests. Owners also prize the vault-like build and safety of the double-pane glass and heavy doors, calling it among the safest cars they've owned. …
• Wheels: the correct Eltanin coupe wheel versus Monoblockscosmetic
  Purists insist the factory-correct upsize wheel for the C140 coupe is the 18-inch Eltanin, sold everywhere except North America, and that AMG Monoblocks were sedan wheels never fitted to coupes from the factory. Nonetheless a large share of owners run Monoblocks for the look, and the small US-market 16-inch wheels are widely seen as unflattering to the proportions. …
• Transponder keys are NLA; two working keys is a big plusownership
  The 1997-onward cars use transponder key fobs that have been NLA from the dealer for years, so a car with two working keys commands a real premium and a single-key car makes owners nervous. A chrome ring around the key receptacle identifies a transponder car. …
• Interior: soft 'Exclusive' leather over increasingly brittle plastics and woodcosmetic
  The extended 'Exclusive' leather is prized as extremely soft, supple and thin, but demands care and is hard to re-source. The bigger worry is aging interior plastic: hidden ABS trim, clips and the wood surrounds become brittle, so removing wood trim risks breaking it and simple fixes turn into ordeals. …
• Buying advice: records, PPI and a well-sorted example over low milesbuying
  Experienced owners stress that a full dealer service history or VMI is what separates a good value from a money pit, and that any 140 will have something needing attention at a PPI. Low mileage is explicitly called an unreliable indicator of value; a drivable high-miles car with no warning lights has necessarily received care, and a 'perfect' low-mile car can hide a huge deferred-maintenance bill. …