Bilstein 44-239985 | Rear Left Air Suspension Strut

Part Number
B4 OE Replacement (Air) - Air Suspension Strut

Fits: 14-17 Mercedes-Benz S550, 15-17 Mercedes-Benz S550e

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Estimated Ship Date: 1 Business Day or Less
Bilstein B4 OE Replacement (Air) dampers are designed to replace the original air suspension systems on many European brand vehicles. Bilstein is an OE supplier for air suspension systems; the quality of these products meets, and typically exceeds, the standards set forth by the vehicle's manufacturer. Bilstein B4 OE Replacement (Air) dampers are designed to connect directly into the original connectors on the vehicle, ensuring modification-free installation and restoration of the original feel of the vehicle.

BRAND: Bilstein


  • Mercedes-Benz S550 2017-2014, S550e 2017-2015
  • B4 OE Replacement (Air) - Air Suspension Strut
  • MB S-Klasse W222;HL;B4AM
  • B4 OE Replacement (Air) - Air Suspension Strut
  • Air Suspension Strut
  • Air Spring with Monotube Shock Absorber


Boot IncludedNo
California Proposition 65WARNING: Cancer & Reproductive Harm -
FinishBlack Paint
Internal DesignMonotube
Lower Mount TypeEye
SeriesB4 OE Replacement (Air)
TitleBilstein Shock Absorbers
Upper Mount TypeMultiple Studs

Without Active Body Control



  • Mercedes-Benz: 222 320 73 13 89
  • Mercedes-Benz: 222 320 53 13
  • Mercedes-Benz: 222 320 73 13


  • 2014-2017 Mercedes-Benz S550 - Position: Rear Left
  • 2015-2017 Mercedes-Benz S550e - Position: Rear Left
Customer Questions
How often should shock absorbers be replaced?
Shock absorbers should generally be replaced every 50,000 miles or every 5-7 years
How to replace shock absorbers?
To replace shock absorbers, you need to remove the wheel and tire assembly, unbolt the old shock absorber, replace it with a new one, and tighten the bolts. Then, reinstall the wheel and tire, and test the new shocks.
Why do shock absorbers leak?
Shock absorbers can leak due to worn seals, damage to the piston or cylinder, or corrosion from exposure to moisture and road salt.
Can shock absorbers be replaced?
Yes, shock absorbers can be replaced when they start to wear out or fail.
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