This replacement window regulator is precision-engineered and extensively tested to match the exact fit, function and performance of the stock window regulator on specific vehicle years, makes and models. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Mercedes-Benz 300SD: 1983, 1984, 1985] - [Mercedes-Benz 300SDL: 1986, 1987] - [Mercedes-Benz 300SE: 1988, 1989, 1990, 1991] - [Mercedes-Benz 300SEL: 1988, 1989, 1990, 1991] - [Mercedes-Benz 350SD: 1991] - [Mercedes-Benz 350SDL: 1990, 1991] - [Mercedes-Benz 380SE: 1984, 1985] - [Mercedes-Benz 380SEL: 1983] - [Mercedes-Benz 420SEL: 1986, 1987, 1988] - [Mercedes-Benz 500SEL: 1984, 1985] - [Mercedes-Benz 560SEL: 1986, 1987, 1988]