The Mercedes-Benz R107 and C107 are automobiles that were produced by Mercedes-Benz from 1971 to 1989, being the second largest individual series ever produced by the automaker, after the G-Class. They were sold under the model names SL (R107) and SLC (C107) as the 280 SL, 280 SLC, 300 SL, 350 SL, 350 SL, 380SL, 420 SL, 450 SL, 450 SL, 500 SL and 560 SL .

The R107 / SL was a two-seater car with a detachable roof. It replaced the W113 SL-Class in 1971 and was replaced by the R129 SL-Class in 1989. It was the only Mercedes cabriolet throughout its production.

The C107 / SLC was a four-seater car with a fixed roof and an optional sliding steel sunroof. It replaced the W111 Coupé in 1971 and was replaced by the C126 S-class coupe in 1981.
The R107 and C107 took the chassis components of the mid-size Mercedes-Benz W114 model and initially combined them with the M116 and M117 V8 engines used in the W108, W109 and W111 series.

The SL variant was a 2-seater / roadster convertible with standard hood and optional hardtop and optional folding seats for the rear seat. The SLC derivative (C107) was a 2-door hardtop coupe with normal rear seats. The SLC is commonly referred to as an 'SL coupe', and this was the first time that Mercedes-Benz had based a coupe on an SL roadster platform instead of on a sedan, replacing the old 280/300 SE based coupe in sedan in Mercedes Line. The SLC was replaced before the SL, with the model running in 1981, with a much larger model, the 380 SEC and 500SEC based on the new S-class.

Volume production of the first R107 car, the 350 SL, began in April 1971 alongside the last of the W113 cars; the 350 SLC followed in October. The 350SL from early 1971 are very rare and were available with an optional automatic 4-speed fluid coupling gearbox. In addition, the rare 1971 cars were equipped with electronic fuel injection from Bosch. Sales in North America started in 1972, and the cars used the name 350 SL, but had a larger 4.5L V8 with 3 speeds (and 450 SL were renamed for the 1973 model year); the large V8 became available in other markets with the official introduction of the 450 SL / SLC in markets outside North America in March 1973. US cars sold from 1972 to 1975 used the Bosch D Jetronic fuel injection system , an old electronic engine management system.

As of July 1974, both SL and SLC could also be ordered with a fuel-injected 2.8-straight-6 like the 280 SL and SLC. The North American models sold from 1976 to 1979 used the Bosch K Jetronic system, a fully mechanical fuel injection system. All US models used the 4.5-liter engine and were called the 450 SL / SLC.

In September 1977, the 450 SLC 5.0 came on the line. This was a homologation version of the big coupe, with a new five-liter V8 all-aluminum, aluminum alloy hood and boot lid and a black rubber rear spoiler, along with a small front spoiler. The 450SLC 5.0 was produced to approve the SLC for the 1978 World Rally Championship.