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Unity rear air strut assembly kit with compressor in box

Unity

Unity Rear Air Strut Assembly Kit 2C-28-513400-20-013404

SKU CH-BTPM-YGE7A

Rear air strut assembly kit with compressor restores ride comfort and structural support for select Mercedes-Benz models

  • OE-spec rear air strut kit restores factory ride quality
  • Includes two electronic strut assemblies for balanced suspension
  • Bundled air compressor rebuilds system pressure
  • Fits select 1999-2006 Mercedes-Benz S-Class models
  • 50 years of aftermarket suspension manufacturing experience

Unity Rear Air Strut Assembly Kit

This kit provides two electronic air suspension strut assemblies and the air suspension compressor needed to restore the original ride quality. It is built to OE specifications for a direct fit on specific Mercedes-Benz models. The components deliver structural support and a smooth, comfortable ride for the vehicle and its load. Unity Automotive backs the parts with over 50 years of aftermarket manufacturing experience.

For Mercedes S-Class owners replacing failed air

Owners of 1999 S320, S420, S430 and S500 models or the 2006 S350 needing a complete rear air suspension refresh will find the correct components here. The kit suits repairs where both struts and the compressor require replacement simultaneously. Vehicles outside the listed model years or different chassis configurations cannot use this assembly kit. Buyers needing only a single strut or a non-electronic unit should look for a different part.

2C-28-513400-20-013404 part number confirms fitment

This specific manufacturer part number identifies the exact kit containing two electronic rear struts and the compressor for the listed Mercedes-Benz applications. Verifying this number against the vehicle's original equipment tag is the only way to ensure compatibility before purchase. No other part number or component count will match this assembly configuration. The number 2C-28-513400-20-013404 is the definitive specification for this kit.

Highlights

  • OE-spec rear air strut kit restores factory ride quality
  • Includes two electronic strut assemblies for balanced suspension
  • Bundled air compressor rebuilds system pressure
  • Fits select 1999-2006 Mercedes-Benz S-Class models
  • 50 years of aftermarket suspension manufacturing experience

Specifications

BrandUNITY

Questions about this item

How do I install the rear air strut assembly kit and which step is commonly missed?

Mount the two electronic air struts to the rear suspension points, connect the air lines and electrical plugs, then fit the compressor. The step often missed is calibrating the ride-height sensors after installation so the electronic control module learns the new strut positions.

What maintenance or replacement will the kit need later?

The air springs and compressor piston seals wear over time. Expect to inspect the air lines for cracks every 20 000 km and plan on replacing the compressor dryer filter if the system starts running longer to reach pressure.

What limit appears first during sustained heavy-load driving?

The compressor duty cycle is the first limit. Continuous inflation under a fully loaded 1999 Mercedes-Benz S500 can overheat the pump, triggering a thermal cut-out until the unit cools.

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