The Mercedes-Benz 450 SL: The R107 Roadster Story, 1972–1980

By Emily Chen

Published June 10, 2026 Updated June 19, 2026 3 generations 1972–1980

The 450 SL is the version of the R107 roadster that most Americans actually bought, and understanding it means understanding the platform it rode on. The R107 ran from 1971 to 1989, one of the longest production lives of any Mercedes, and it was engineered to be overbuilt in the way the company was known for at the time: a heavy, beautifully made convertible with a removable hardtop, a robust V8, and a structure designed around occupant safety years before that was fashionable. The 450 SL is the 4.5-liter V8 car sold in the US through the 1970s, and it is one of the most usable classic Mercedes you can own because the mechanicals are durable and the parts supply is good. The deciding factor on any example is condition, specifically rust and deferred maintenance, rather than mechanical wear.

Mercedes-Benz 450 SL — Generation by Generation

1972–1973

US Debut

"The 4.5 V8 arrives in America"

The R107 reached the United States with the 4.5-liter M117 V8, a smooth and torquey engine matched to a three-speed automatic. Early US cars briefly carried 350 SL badging despite the larger engine before the 450 SL name settled in. These first cars wear the cleaner pre-1974 chrome bumpers that many enthusiasts prefer, and they pair the new safety-focused structure with the removable hardtop that makes the SL a practical all-season car. Mechanically robust, they are sought after for the early bumper styling.

Key Changes

→ 4.5-liter M117 V8 for the US market
→ Three-speed automatic transmission
→ Early cars briefly badged 350 SL
→ Pre-1974 chrome bumpers
→ Removable hardtop standard

Specs

Engine	4.5L M117 V8
Transmission	3-speed automatic
Bumpers	Slim chrome (pre-1974)
Top	Soft top plus removable hardtop

Mercedes-Benz 450 SL for Sale — 1972–1973

Dealer

United States

1973 Mercedes-Benz 450 SL

$11,995 197,000 miles

Dealer

United States

1973 Mercedes-Benz 450 SL

$14,995

Dealer

United States

1972 Mercedes-Benz 450 SL

$16,995 130,800 miles

See all 1972–1973 450 SL listings →

1974–1976

Federalized Years

"Big bumpers and emissions tuning"

US safety rules brought the large impact-absorbing bumpers for 1974, the single most obvious visual change to the federal cars, along with the side marker and lighting updates of the era. Emissions equipment tightened, and power outputs softened as the M117 was tuned to meet the new standards. These remain durable, comfortable cars, and they are generally the most affordable way into a 450 SL, though buyers who dislike the heavy bumpers gravitate toward the earlier cars.

Key Changes

→ Large federal impact bumpers from 1974
→ Updated side markers and lighting
→ Tighter emissions tuning
→ Softer power outputs
→ Continued durable construction

Specs

Engine	4.5L M117 V8
Bumpers	Federal impact type
Emissions	Tightened tuning
Value	Most affordable 450 SL

Mercedes-Benz 450 SL for Sale — 1974–1976

Dealer

United States

1976 Mercedes-Benz 450 SL

$7,495 77,000 miles

Dealer

United States

1975 Mercedes-Benz 450 SL

$10,495 167,000 miles

Dealer

United States

1975 Mercedes-Benz 450 SL

$13,995 200,000 miles

See all 1974–1976 450 SL listings →

1977–1980

Late 450 SL

"Refinement before the 380 SL"

The later 450 SL cars gained the small refinements typical of a maturing Mercedes platform: improved fuel injection, interior and trim updates, and the addition of cruise control and other conveniences. Catalytic converters and tighter emissions controls arrived, trimming power further, but the cars are smooth and well sorted. The 450 SL gave way to the lighter 380 SL for 1981, which makes these final 450s the last of the big-V8 1970s SLs and a favorite for buyers who want the torque of the 4.5 with the most developed version of the car.

Key Changes

→ Improved fuel injection and trim
→ Cruise control and convenience features
→ Catalytic converters and tighter emissions
→ Most developed version of the 450 SL
→ Replaced by the 380 SL for 1981

Specs

Engine	4.5L M117 V8
Emissions	Catalytic converter
Features	Cruise control, trim updates
Successor	380 SL (1981)

Mercedes-Benz 450 SL for Sale — 1977–1980

Dealer

United States

1977 Mercedes-Benz 450 SL

$11,095 78,000 miles

Dealer

United States

1977 Mercedes-Benz 450 SL

$11,995 78,000 miles

Dealer

United States

1977 Mercedes-Benz 450 SL

$24,995 45,483 miles

See all 1977–1980 450 SL listings →

Legacy & Impact

For a buyer, the 450 SL is a known quantity, which is part of its appeal. The M117 V8 is durable, the hardtop makes it a genuine year-round car, and values sit below the earlier Pagoda SL while offering similar usability. The things that matter are condition items: rust in the rockers, floors, and around the rear of the front fenders, the state of the climate and fuel-injection systems, and a documented service history. Avoid the cheap car that needs everything, because the labor on these adds up fast. A well-kept, rust-free 450 SL with records is one of the best-value usable classic Mercedes, and a far smarter purchase than a tired example bought on price alone.

Frequently Asked Questions

Both are R107 roadsters. The 350 SL name was used in some markets with a 3.5-liter V8, while the 450 SL used the larger 4.5-liter M117 V8. In the United States the 4.5-liter engine was fitted from the start, even on early cars that briefly wore 350 SL badging.

The M117 V8 and the R107 chassis are durable and well supported by parts, so reliability is good for a car of its age. The main risks are rust and deferred maintenance on the climate and fuel-injection systems rather than fundamental mechanical weakness.

The R107 generation ran from 1971 to 1989, making it one of the longest-lived Mercedes platforms. The 450 SL covered the US 1970s, followed by the 380 SL and then the 560 SL in the 1980s.

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Emily Chen

Oakland, California

Bay Area engineer with a deep focus on vintage Japanese and European performance cars. Approaches classic car research and restoration with an analytical eye.