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Cylindrical black rubber air spring with metal end caps, 12.6 by 7.87 inches

Unity

Unity 15-513100 Rear Air Spring 2003-2009 Mercedes E-Class

SKU CH-4MWH-02XMD

Rear air spring restores factory ride height on 2003-2009 Mercedes E-Class models including E320, E350, E500, E55 AMG and E63 AMG

  • Product typeInstallation Tools
  • Vehicle-specific OE-style fit enables trouble-free installation
  • Restores factory ride height for stable comfortable ride
  • Replacing both sides ensures balanced suspension performance
  • Fits E320, E350, E500, E55 AMG, E63 AMG models
  • Compact 12.6 x 7.87 x 7.87 inch dimensions simplify fitment

Rear Air Spring for E-Class 2003-2009

The Unity 15-513100 rear air spring fits 2003-2005 E320, 2006-2009 E350, 2004-2006 E500, 2006 E55 AMG and 2007-2009 E63 AMG models. It is a vehicle-specific OE-style replacement assembly engineered for superior fit and trouble-free installation. The part restores factory ride height and delivers a stable, comfortable ride. It is intended for owners and technicians servicing the air suspension on these Mercedes-Benz vehicles.

Sustained Load Behaviour

The air spring is built to maintain consistent pressure and damping characteristics over extended driving periods. It supports the vehicle weight continuously without the sag or leakage that develops in worn units. The assembly restores the original ride height under constant load, keeping handling predictable on long journeys. Replacing both rear units together ensures balanced performance side to side.

Build Quality and Mounting

The unit measures 12.6 x 7.87 x 7.87 inches and weighs 4.41 lbs, matching the original mounting points for direct bolt-on fitment. OE-style construction uses materials selected for long-lasting reliability and resistance to road debris. The design aligns with factory plumbing and electrical connectors, so no adaptation is required during installation. It is covered by the manufacturer's warranty.

How it compares

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Price $220.99
Pricier than about 90% of the 2,768 comparable items (median $21.99).

Specifications

Product
Product typeInstallation Tools

Questions about this item

How does the 15-513100 rear air spring perform under continuous daily driving loads?

The air spring is engineered as a vehicle-specific OE-style replacement that restores factory ride height and delivers a stable, comfortable ride during sustained operation.

What existing suspension components must be present on the Mercedes for this air spring to install correctly?

It fits the original rear air suspension mounting points on 2003-2009 E-Class models including E320, E350, E500, E55 AMG and E63 AMG without modification.

Will the 15-513100 work alongside the original air compressor and valve block on a 2005 E320?

Yes, the assembly is designed to integrate with the factory air suspension system on all listed model years, including the 2005 E320.

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