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Unity rear electronic air shock, black metal cylinder with electrical connector

Unity

Unity 13-512900 Rear Electronic Air Shock

SKU CH-1T0R-GPX3N

Replaces rear air shocks on select 2006-2012 Mercedes GL and ML models using existing suspension components

  • Direct-fit replacement for select Mercedes models
  • Works with existing suspension components
  • Minimises repair time during installation
  • Built by a brand with 50 years' experience
  • Designed for long-lasting reliability

Rear Electronic Air Shock for Mercedes

The Unity 13-512900 rear electronic air shock replaces worn or leaky units on select Mercedes-Benz GL and ML models from 2006 to 2012. It is designed for vehicles without Active Dampening Suspension, using existing components to reduce repair time. Professional technicians and DIY owners restoring factory ride quality will find this a direct-fit solution.

Direct-fit design minimises installation effort

Because the shock matches original equipment dimensions and mounting points, no suspension modifications are required during fitting. The unit integrates with the vehicle’s electronic control system to maintain proper damping response. This compatibility helps avoid the calibration issues that can arise with non-OE specification parts.

Built for long-term reliability on supported models

Unity’s 50-year aftermarket manufacturing background informs the construction of this Elite Suspension line air shock. The housing and seals are engineered to withstand road salt, temperature cycles and repeated compression cycles. Coverage includes GL320, GL350, ML320, ML350, ML450, ML500 and ML550 variants within the stated model years.

Highlights

  • Direct-fit replacement for select Mercedes models
  • Works with existing suspension components
  • Minimises repair time during installation
  • Built by a brand with 50 years' experience
  • Designed for long-lasting reliability

Specifications

BrandUNITY

Questions about this item

How is the Unity 13-512900 rear electronic air shock installed, and what step is commonly missed?

Install as a direct-fit replacement using existing suspension components; the step often missed is verifying the vehicle does not have Active Dampening Suspension (ADS) before fitting.

What maintenance or replacement will the Unity 13-512900 rear electronic air shock need later?

Inspect air lines and fittings for leaks during routine service; replace the unit if damping performance degrades or electronic control signals fail.

What limit appears first on the Unity 13-512900 rear electronic air shock under sustained use?

Continuous operation on ADS-equipped models (2006-2012 Mercedes-Benz GL/ML 320, 350, 450, 500, 550) will cause electronic control mismatch and premature wear.

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