SuperPro Differential Mount Bushing Kit

Suspension subframes form the connection between the suspension and the vehicle's body and passenger compartment. These are one of the key areas vehicle manufacturers use to tune the passenger comfort and isolation. This means in many vehicles the bushings that soft heavily-voided rubber is used. As this rubber ages and degrades it allows significant movement in the suspension mounting which impacts traction, handling and control. In more powerful vehicles the original soft rubber bushings can also contribute to wheel hop under acceleration and significant movement in changing loads or gear changes “ all of which sap performance and reduce passenger comfort. SuperPro repairs and enhances performance while retaining OEM levels of isolation through the use of superior materials and designs. Further; the performance of SuperPro's subframe bushings does not degrade overtime as the synthetic elastomer materials used are not compromised be exposure to the elements or the varying loads over a vehicle's life.

Restore stability and improve drivetrain control with the SuperPro Differential Mount Bushing Kit, part number SPF5178K. Designed for select Mercedes-Benz applications, this kit replaces aging, soft differential mount bushings that can allow excessive movement under acceleration, gear changes, and varying loads. Reduced movement helps support more consistent traction, handling, and control while maintaining a balanced level of ride isolation for everyday driving.
SuperPro uses advanced synthetic elastomer materials and performance-focused designs to provide a durable alternative to conventional rubber bushings. Unlike heavily voided factory rubber that can soften and degrade with age, these bushings are engineered to resist deterioration from road conditions, changing loads, and long-term use. The result is improved differential positioning and more predictable drivetrain response without unnecessarily harsh cabin vibration.
This automotive bushing kit is designed for installation on select Mercedes-Benz 300SD, 350SDL, and 500SEL models from the listed application years. Confirm vehicle fitment before ordering to ensure compatibility. The SuperPro SPF5178K kit is a practical choice for restoring worn differential mounting performance and supporting dependable suspension and drivetrain operation.

Features:

• Vehicle-specific differential mount bushing kit for select Mercedes-Benz applications

• Replaces aging rubber bushings that allow excessive differential movement

• Helps improve traction, handling, drivetrain control, and load-change response

• Synthetic elastomer construction resists deterioration from environmental exposure and repeated loading

• Maintains a balanced level of suspension and drivetrain isolation for improved driving comfort

• Designed for select 1981–1992 Mercedes-Benz 300SD, 350SDL, and 500SEL models

• SuperPro part number SPF5178K

Fitment:
Mercedes-Benz 300SD Base 1979
Mercedes-Benz 300SD Base 1980
Mercedes-Benz 300SD Base 1981
Mercedes-Benz 300SD Base 1982
Mercedes-Benz 300SD Base 1983
Mercedes-Benz 300SD Base 1984
Mercedes-Benz 300SD Base 1985
Mercedes-Benz 300SD Base 1992
Mercedes-Benz 300SDL Base 1986
Mercedes-Benz 300SDL Base 1987
Mercedes-Benz 300SE Base 1988
Mercedes-Benz 300SE Base 1989
Mercedes-Benz 300SE Base 1990
Mercedes-Benz 300SE Base 1991
Mercedes-Benz 300SE Base 1992
Mercedes-Benz 300SEL Base 1988
Mercedes-Benz 300SEL Base 1989
Mercedes-Benz 300SEL Base 1990
Mercedes-Benz 300SEL Base 1991
Mercedes-Benz 350SD Base 1991
Mercedes-Benz 350SDL Base 1990
Mercedes-Benz 350SDL Base 1991
Mercedes-Benz 380SE Base 1984
Mercedes-Benz 380SE Base 1985
Mercedes-Benz 380SEC Base 1982
Mercedes-Benz 380SEC Base 1983
Mercedes-Benz 380SEL Base 1981
Mercedes-Benz 380SEL Base 1982
Mercedes-Benz 380SEL Base 1983
Mercedes-Benz 380SLC Base 1981
Mercedes-Benz 420SEL Base 1986
Mercedes-Benz 420SEL Base 1987
Mercedes-Benz 420SEL Base 1988
Mercedes-Benz 420SEL Base 1989
Mercedes-Benz 420SEL Base 1990
Mercedes-Benz 420SEL Base 1991
Mercedes-Benz 450SEL Base 1980
Mercedes-Benz 500SEC Base 1984
Mercedes-Benz 500SEC Base 1985
Mercedes-Benz 500SEL Base 1984
Mercedes-Benz 500SEL Base 1985
Mercedes-Benz 560SEC Base 1986
Mercedes-Benz 560SEC Base 1987
Mercedes-Benz 560SEC Base 1988
Mercedes-Benz 560SEC Base 1989
Mercedes-Benz 560SEC Base 1990
Mercedes-Benz 560SEC Base 1991
Mercedes-Benz 560SEL Base 1986
Mercedes-Benz 560SEL Base 1987
Mercedes-Benz 560SEL Base 1988
Mercedes-Benz 560SEL Base 1989
Mercedes-Benz 560SEL Base 1990
Mercedes-Benz 560SEL Base 1991