Every classic Mercedes-Benz carries the same promise: it was built to an engineering standard first and a price second. That idea gave the world fuel-injected sixes in the 1950s, hand-finished V8 convertibles in the 1960s and a 6.9-liter sedan in the 1970s. It also explains why so many of these cars survive.
But survival isn’t the same as being special. Plenty of old Mercedes models are pleasant and durable without stirring anything inside you. A few, however, are different. They mix rarity, engineering and the feeling you get behind the wheel in a way that makes letting go almost impossible.
These are our picks for the eight Mercedes-Benz models we’d keep no matter what someone offered. The “refuse to sell” verdict is our opinion. On the other hand, the specs, production totals and sale results come from auction catalogs, maker history and period sources.
1. 1963 Mercedes-Benz 230SL, the classic Pagoda
Mercedes unveiled the 230SL at the Geneva Motor Show in March 1963. Its first party piece was the roof. Béla Barényi and Paul Bracq designed a hardtop with a slightly concave center, and that dip gave the car its “Pagoda” nickname. Under the hood sat a 2,308cc inline-six with mechanical Bosch fuel injection, rated at 150 PS.
The 230SL also brought serious safety thinking to a small sports car. Barényi built the body around a rigid passenger cell with crumple zones front and rear. As a result, the Pagoda felt solid in a way few open two-seaters of its day did.
Mercedes built 19,831 of the 230SL before the 250SL replaced it in 1967. The later 280SL sold in bigger numbers, but the 230SL is the purest version of the idea, with the original engine and the original look. Our take: this is the classic Mercedes-Benz we’d hand down rather than sell. If you’re drawn to the earlier SL, our story on why the Mercedes 300SL sparks bidding wars at 70 covers the car that started the line.
2. 1971 Mercedes-Benz 280SE 3.5 Cabriolet
The 280SE 3.5 Cabriolet was the last of a breed. Mercedes added the 3.5-liter models in August 1969 and sold them through the 1971 model year. The open car carried a 3,499cc overhead-valve V8 rated at 200 hp, wrapped in the elegant W111 body that dated back to the early 1960s.
According to RM Sotheby’s catalog, Mercedes built just 1,232 of the cabriolets over 24 months, alongside 3,270 coupes. The same catalog calls the 3.5 cars the last production Mercedes models built with a high degree of hand finishing. That shows in the wood, the leather and the way the top folds away.
Not surprisingly, collectors have noticed. RM Sotheby’s sold the car in that catalog for $330,000. In our view, though, the real value is in the drive, because a V8 and a convertible top suit this body perfectly. We’d keep one forever and use it every sunny weekend.
3. 1975 Mercedes-Benz 450SEL 6.9
The 450SEL 6.9 was a luxury sedan with a secret. Its M100 V8 displaced 6,834cc and made about 286 PS in European form, while US cars carried a 250-hp rating. Mercedes also fitted a full hydropneumatic suspension as standard, so the car rode on gas and fluid instead of steel springs.
Yet it wasn’t cheap. For 1978, the US price for the 6.9 stood at $38,230, a huge figure for a four-door sedan then. In return, buyers got near-limousine space, a big-car ride and the punch of a sports car. Production ran from 1975 to 1980, and Mercedes built 7,380 of them.
In our opinion, the 6.9 is the finest sleeper in plain clothes, because nothing outside shouts about the engine. Keeping the suspension healthy takes a specialist, so we’d hold on to a well-sorted car rather than risk finding another. For more on the regular 450SEL, see our look at why the 450SEL focused on authority.
4. 1986 Mercedes-Benz 560SEC
The SEC was the S-Class with two doors and no B-pillars. The coupe followed the sedan in 1981, and the 560SEC arrived with the 1986 update. It used a 5.5-liter M117 V8. The Truth About Cars rates it at 275 hp and 317 lb-ft.
Meanwhile, the coupe always played the rarer role. The same report says Mercedes built 818,063 sedans of this S-Class generation but only 74,060 coupes. Production of both ended in October 1991. With the side windows down, the pillarless profile still looks clean today.
So why would we refuse to sell one? Because big Mercedes coupes from this era are bargains now, and a good one will never be cheaper to replace than it is to keep. The car in that 2020 listing, with 158,000 miles, carried a price of $10,950. Our take: buy the best 560SEC you can afford and keep it. Our story on when the 500SEC ruled authority tells the earlier side of the story.
5. 1958 Mercedes-Benz 220SE Ponton Cabriolet
The 220SE was the “Ponton” Mercedes with fuel injection. When the 220S gained Bosch injection, it became the 220SE, and its overhead-cam, 2.2-liter six got an aluminum head. Mercedes built the cabriolet version from July 1958 to November 1960.
It was also a low-volume car. The Truth About Cars counts 1,112 cabriolets and 830 coupes. Its report also gives a 1959 price of $8,091 for the 220SE, about $72,000 in modern money.
Buyers paid for craftsmanship, and that’s what you get. The heavy doors, thick top and handsome dashboard make it feel like a coachbuilt car. In our view, the 220SE Cabriolet is the most underrated open Mercedes of the 1950s, and we’d guard ours closely.
6. 1978 Mercedes-Benz 450SLC 5.0
This is the homologation special of the SL family. Mercedes built the 450SLC 5.0 to qualify the SLC coupe for rallying. It got an all-aluminum 5.0-liter M117 V8 making 240 bhp. Mercedes also used aluminum for the hood, doors and trunk lid, and it added a rear spoiler and front air dam.
According to Silodrome, the aluminum panels saved about 125 pounds. The aluminum engine was 88 pounds lighter than the iron-block V8 it came from. Then the plan paid off. In 1979, works cars finished first through fourth at the Bandama Rally in the Ivory Coast.
Road cars, by comparison, are scarce. Mercedes made 2,769 of the 5.0-liter SLCs from 1978 through 1981, counting the later 500SLC. RM Sotheby’s calls it the rarest car on the 107 chassis. In our opinion, few people outside classic Mercedes-Benz circles know what a 450SLC 5.0 is, and that’s exactly why we’d keep one.
7. 1994 Mercedes-Benz C36 AMG
The C36 AMG was the first car Mercedes and AMG developed together. The two companies began working on high-performance models in 1990. Then the C36 premiered at the Frankfurt motor show in September 1993, as the top model of the new C-Class.
AMG enlarged the C280’s six-cylinder engine to 3,606cc. According to a Mercedes-Benz release, it made 280 hp at 5,750 rpm and 385 Nm of torque. The release adds that Mercedes had built 5,221 of them by 1997.
Today, AMG is a household name. Yet this compact sedan is where that story started. Our take: the C36 drives like a smooth, quick sedan rather than a muscle car, and its place in history makes it one we’d never sell.
8. 1992 Mercedes-Benz 300CE-24 Cabriolet
The 300CE-24 Cabriolet finally arrived in 1991. According to Classic Trim Parts, it was the first Mercedes cabriolet since the W111 range ended in 1971. That 20-year gap tells you how hard Mercedes worked on it. Engineers had to make the W124 body strong enough without a fixed roof, which took a great deal of redesign.
The result had a 3.0-liter, 24-valve M104 six with Bosch fuel injection. Classic Trim Parts rates it at 217 hp at 6,400 rpm and 195 lb-ft of torque. Meanwhile, Mercedes built only 6,343 of the 300CE-24 Cabriolets from 1991 to 1993.
In our view, it’s the best everyday classic Mercedes-Benz convertible ever made: solid, quiet with the top up and easy to live with. Mercedes built 33,952 A124 cabriolets in all, but the early 300CE-24 is the one that started that run.
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