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Unity rear electronic air shock, metallic cylinder with electrical connector

Unity

Unity 13-517000 Rear Electronic Air Shock

SKU CH-BBSA-5Y1WE

Direct-fit rear electronic air shock for 2012–2017 Mercedes GL and ML models with ADS suspension

  • Direct-fit replacement for select Mercedes GL and ML models
  • Works with existing OE suspension components for easy installation
  • Designed for vehicles with Active Dampening Suspension (ADS)
  • Manufactured by Unity with over 50 years of aftermarket experience
  • Elite Suspension line built for long-lasting reliability and smooth ride

Direct-fit rear air shock for Mercedes-Benz GL

The Unity 13-517000 is a rear electronic air shock designed as a direct replacement for worn or leaking original units on 2013-2016 GL350, GL450, GL550 and GL63 AMG models. It also fits 2012-2015 ML350, ML550 and ML63 AMG plus 2016-2017 GLE series vehicles. The part works with existing suspension components to reduce repair time.

Built for reliable daily operation

The shock is engineered to integrate with the vehicle's original electronic suspension system and provide a smooth, comfortable ride under normal driving conditions. Unity's manufacturing standards target long-lasting reliability and trouble-free installation. No active dampening suspension (ADS) models are supported by this unit.

Maintains consistent performance over extended use

The air shock is constructed to withstand repeated compression cycles without degradation of ride quality. It replaces the factory component directly, preserving the original suspension geometry and electronic control behaviour during sustained operation. ADS-equipped vehicles require a different solution.

Highlights

  • Direct-fit replacement for select Mercedes GL and ML models
  • Works with existing OE suspension components for easy installation
  • Designed for vehicles with Active Dampening Suspension (ADS)
  • Manufactured by Unity with over 50 years of aftermarket experience
  • Elite Suspension line built for long-lasting reliability and smooth ride

Specifications

BrandUNITY

Questions about this item

How is the 13-517000 rear air shock installed, and what step is often missed?

Install the shock as a direct fit using existing suspension components. The step often missed is confirming the vehicle does not have Active Dampening Suspension (ADS), which this unit does not support.

What maintenance or replacement will the 13-517000 air shock need later?

Inspect the air lines and fittings for leaks during routine service. Replace the shock if the air bladder develops a leak or the electronic height sensor fails, as these are not serviceable separately.

What limit appears first on the 13-517000 under sustained heavy loading?

The air bladder reaches its maximum pressure capacity first, limiting further lift. Continuous heavy loads can also overheat the internal compressor relay, triggering a temporary suspension fault.

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