• SuperPro Diff Mount Bushing Kit SPF5178K for 1979-1992 Mercedes-Benz 300SD, 380SEL, 420SEL, 560SEL and 560SEC
  • SuperPro Diff Mount Bushing Kit SPF5178K for 1979-1992 Mercedes-Benz 300SD, 380SEL, 420SEL, 560SEL and 560SEC, view 2
  • SuperPro Diff Mount Bushing Kit SPF5178K for 1979-1992 Mercedes-Benz 300SD, 380SEL, 420SEL, 560SEL and 560SEC, view 3
  • SuperPro Diff Mount Bushing Kit SPF5178K for 1979-1992 Mercedes-Benz 300SD, 380SEL, 420SEL, 560SEL and 560SEC, view 4
  • SuperPro Diff Mount Bushing Kit SPF5178K for 1979-1992 Mercedes-Benz 300SD, 380SEL, 420SEL, 560SEL and 560SEC, view 5
  • SuperPro Diff Mount Bushing Kit SPF5178K for 1979-1992 Mercedes-Benz 300SD, 380SEL, 420SEL, 560SEL and 560SEC, view 6
  • SuperPro Diff Mount Bushing Kit SPF5178K for 1979-1992 Mercedes-Benz 300SD, 380SEL, 420SEL, 560SEL and 560SEC, view 7
1 7

SuperPro

SuperPro Diff Mount Bushing Kit SPF5178K for 1979-1992 Mercedes-Benz 300SD, 380SEL, 420SEL, 560SEL and 560SEC

SuperPro Diff Mount Bushing Kit SPF5178K for 1979-1992 Mercedes-Benz 300SD, 380SEL, 420SEL, 560SEL and 560SEC

$206.99 USD
$206.99 USD
Sale Out of stock
Shipping calculated at checkout.
  • Ships directly from the warehouse to you
  • Tracking emailed when it ships
  • Free fitment check before you order

More for your vehicle:All Mercedes-Benz parts

Listed for: 1979-1992 Mercedes-Benz 300SD, 380SEL, 420SEL, 560SEL and 560SECFitment notes & questions

SuperPro's SPF5178K kit renews the differential mount bushings on the large Mercedes-Benz sedans and coupes listed below, from the 300SD diesel to the 560SEL and 560SEC. It suits owners of these cruisers who notice a clunk from the rear on and off the throttle.

The differential is mounted to the body or subframe through bushings that absorb drivetrain movement. As they wear, the diff can shift under power and on and off the throttle, which feels like a clunk or shunt from the rear. New mounts help keep the drivetrain steady.

Key features

  • Differential mount bushing kit
  • Part number SPF5178K

Fitment

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

Check your year, trim and drivetrain against the list above before ordering.

Install notes

The bushings are a press fit. If you do not have a press, a suspension or alignment shop can install them for you.

Questions & answers

No questions yet. Ask about fitment, ride height or what's in the box and we'll answer by email.

View full details

SuperPro bushings for your Mercedes-Benz 300SD, 380SEL, 420SEL, 560SEL and 560SEC: what to know

If the car feels loose, clunks over bumps or wanders under braking, tired bushings are a common cause on a Mercedes-Benz 300SD, 380SEL, 420SEL, 560SEL and 560SEC with some age on it.

Fitment notes

  • Listed for: 1979-1992 Mercedes-Benz 300SD, 380SEL, 420SEL, 560SEL and 560SEC.
  • Model years: 1979-1992. Check your car's year falls inside this range.
  • Specs, lead time and warranty come from SuperPro and can change. The details above this guide are the latest we have.

Not sure it fits? Message us your car's details and we'll double-check fitment with the supplier before you buy.

Ask about fitment

Parts that usually go with it

  • An alignment after installing new arms or bushings.
  • Matching parts at the other end. Upgrading one side or one link and leaving worn parts elsewhere limits the improvement.
  • Install tools. Pressed-in bushings may need a press or a shop to fit them.

More for your car: Mercedes-Benz Coilovers & Suspension · All Bushings & Mounts

Questions about Mercedes-Benz 300SD, 380SEL, 420SEL, 560SEL and 560SEC bushings

Will this fit my Mercedes-Benz 300SD, 380SEL, 420SEL, 560SEL and 560SEC?
It is listed for the 1979-1992 Mercedes-Benz 300SD, 380SEL, 420SEL, 560SEL and 560SEC. Check your year, model, drivetrain and chassis code against the product title. If anything is different, contact us and we will confirm fitment with the supplier before you order.
Do I need an alignment after installing this?
If the part changes or affects suspension geometry, yes. It is a good idea after any arm, link or bushing change.
Can I install it myself?
Many bolt-on parts can be installed at home with the right tools and a safe way to support the car. Pressed bushings and anything you are unsure about are best left to a shop.
Where do specs and warranty details come from?
From SuperPro. We sell parts from several brands and suppliers, and each one sets its own specs, lead times and warranty terms. The product details above are the latest we have.
More parts for the Mercedes-Benz
Shop all Mercedes-Benz partsMercedes-Benz Coilovers & SuspensionBushings & Mounts