The Mercedes-Benz SL series has consistently represented automotive elegance and sophistication. Each generation of the SL seems to both embody and define the spirit of its time. This was certainly true when the R107 Mercedes-Benz SL debuted in 1971, succeeding the beloved 230/250/280SL W113 “Pagoda” series. The R107, including the celebrated 1975 Mercedes 450sl, enjoyed a remarkably long production run with only minor changes, lasting until 1989.
The R107 marked a significant shift for the SL, introducing a V-8 engine to the convertible lineup. This was a necessary upgrade considering the new model’s increased weight, tipping the scales at around 3400 pounds. The styling, while still recognizably Mercedes-Benz, was more substantial and mature than the previous “Pagoda” models. Despite having similar dimensions, the R107 appeared larger and more imposing on the road.
Initially, in 1972, the model was designated the 350SL, aligning with European naming conventions, even though under the hood resided a robust 4.5-liter V-8 engine. This fuel-injected V-8 featured a single overhead camshaft per bank and produced a healthy 230 horsepower. It was exclusively paired with a three-speed automatic transmission, reflecting the luxury touring nature of the car, with no manual option offered. The chassis boasted a fully independent suspension for a comfortable ride and confident handling, and four-wheel disc brakes were standard, ensuring ample stopping power.
Later in 1972, the model designation was revised, and the 450SL nameplate was adopted for the US market and beyond. Another significant change in 1972 was the method of horsepower rating. The introduction of SAE net horsepower ratings meant the 1975 Mercedes 450SL’s power was now listed at a more modest 190 hp, reflecting a change in measurement rather than actual engine output. The following year, 1973, saw the 450SL adopt substantial safety bumpers, front and rear, to comply with evolving federal safety regulations in the United States, a key market for the model.
By 1975, emissions control requirements became more stringent, further impacting engine output. With the addition of a catalytic converter to meet these new regulations, the 1975 Mercedes 450SL’s power was slightly reduced to 180 hp. Despite this reduction, the 1975 450SL remained a luxurious and capable grand tourer, embodying the sophisticated driving experience Mercedes-Benz was known for.
In 1976, further refinements were made to the fuel system with the introduction of continuous fuel injection, along with transistorized ignition, improving efficiency and reliability. In 1978, automatic climate control and stylish 14-inch aluminum wheels became standard equipment, further enhancing the luxury and appeal of the SL. While 1979 saw no major changes, 1980 brought another revision to the fuel injection system, unfortunately leading to a further decrease in power to 160 hp for the final year of the 450SL model run.
The 450SL model concluded its production with the 1980 model year, paving the way for the 380SL to carry the R107 torch into the 1980s. Throughout its production run, the 450SL, particularly models like the 1975 Mercedes 450SL, enjoyed consistent popularity, averaging around 6,000 units sold annually. This, combined with Mercedes-Benz’s renowned build quality and reputation for longevity, means that finding a 1975 Mercedes 450SL today is relatively easy. These classic roadsters remain highly sought after as comfortable and stylish open-top cruisers, offering a taste of 1970s luxury and a testament to Mercedes-Benz engineering excellence.
