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Unity rear conversion kit in cardboard packaging

Unity

Unity 30-512700 Rear Conversion Kit

SKU CH-135M-B2KFE

Converts air suspension to passive coil springs on select 2003-2011 Mercedes E-Class and CLS models, excluding wagons

  • Converts air suspension to reliable coil springs
  • Fits Mercedes CLS550, E320, E350, E500, E55 AMG, E550, E63 AMG
  • Excludes wagon models for precise application
  • Over 50 years aftermarket manufacturing experience
  • Engineered for trouble-free installation and durability

Rear Air-to-Coil Conversion Kit

The Unity 30-512700 kit converts the rear air suspension on select Mercedes models to a passive steel-spring setup. It fits 2003-2011 CLS and E-Class sedans including E320, E350, E500, E55 AMG, E550, E63 AMG and CLS550. Wagon models are excluded from the application list. This kit targets owners seeking to eliminate air-system leaks and compressor failures.

Limited to Specific Sedan Chassis

The conversion only covers the rear axle on the listed sedan variants produced between 2003 and 2011. It does not fit any wagon body style or any model outside the named range. Front air suspension remains unchanged and must be serviced separately. Buyers needing a full four-corner conversion or coverage for wagon models cannot use this kit alone.

Direct Replacement Installation

The kit is designed as a direct retrofit for the original air springs using existing mounting points. No fabrication or welding is required for the listed vehicles. Common issues include reusing worn upper mounts or forgetting to disable the air-suspension warning light after installation. Proper torque on all fasteners prevents premature noise or alignment shifts.

How it compares

Measured against everything we stock in Brake Service Tools & Presses, at today’s prices. Recalculated every night.

Price $180.99
Pricier than about 80% of the 1,702 comparable items (median $86.99).

Specifications

Product
Brand nameUNITY

Questions about this item

Does the Unity 30-512700 kit cover my 2007-2011 Mercedes CLS550 rear suspension?

Yes, the kit is listed for 2007-2011 Mercedes CLS550 models, converting the rear air suspension to passive coil springs.

What does converting the rear air ride to passive suspension actually change on the car?

It replaces the factory air springs with steel coil springs, removing the compressor and air lines for a simpler, maintenance-free setup.

Are any special tools or adapters needed to fit this kit on a 2003-2009 Mercedes E320?

The kit is designed as a direct retrofit for the listed E-Class models, using the original mounting points without extra adapters.

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