Air Suspension Bellow Rear W166 for Mercedes-Benz

Rear air suspension bellow for Mercedes W166 ML, GLE and GL, restores correct ride height and comfort with OEM quality and easy fitment. #PartsForMercedes

Replacement rear air suspension bellow for Mercedes-Benz ML, GLE and GL models on the W166 platform. Designed to restore correct rear ride height and load leveling, it delivers smooth damping and stable handling under everyday driving, towing and off-road use. Built from OEM grade elastomer with reinforced crimp rings for long service life. Direct-fit design mounts to factory brackets and connects to the original air line for a quick, clean installation that solves sagging or uneven rear suspension.

Key Features:

OEM Specification:
Engineered to match Mercedes-Benz pressure rating, ride quality and durability requirements for W166 rear Airmatic systems.

High Quality Air Spring Material:
Multi-layer rubber construction resists cracking and fatigue, even under heavy load or rough road conditions.

Precision Crimp Seal:
Strong metal crimp ring provides an airtight seal for consistent system pressure and reduced risk of leaks.

Direct Fitment:
Fits original top and bottom mounts and accepts the OE air line connector, so no cutting or modifications are needed.

Ride Comfort Restored:
Brings back factory ride height and comfort, improving stability during cornering, braking and highway cruising.

Compressor Friendly:
A tight, leak resistant design helps reduce compressor run time and extends the life of the complete air suspension system.

Compatibility:

Mercedes-Benz ML-Class (W166):
ML250, ML300, ML320, ML350, ML400, ML500, ML63 AMG

Mercedes-Benz GLE-Class (W166):
GLE250, GLE300, GLE350, GLE400, GLE43, GLE63 AMG

Mercedes-Benz GL/GLS-Class (X166):
Selected GL and GLS models using rear Airmatic air suspension

Typical model years: 2011 to 2018
(Rear axle, left or right, for vehicles equipped with factory air suspension.)

Related Part Numbers:

Mercedes-Benz OEM references include:
A1663200325, 1663200325, A1663200525, A1663200625, 1663200625, plus earlier A1643200225, A1643200425, A1643200625, A1643200725 and related supersessions. Aerosus+2PES Germany GmbH+2

(Always confirm against the VIN and the part number printed on your original bellow before purchase.)

Why Choose TOParts:

TOParts supplies OEM quality Mercedes-Benz replacement components that are engineered for precise fitment and dependable performance. Our parts are trusted by workshops across South Africa for consistent quality, value and after sales support.

Q&A:

Q1: Will this fix a rear sagging or “vehicle rising slowly” message?
A1: If the problem is caused by a leaking rear bellow, replacing it will usually solve sagging and speed up lifting. Also check for leaks in lines and confirm the compressor is operating correctly.

Q2: Should I replace both rear bellows at the same time?
A2: This is recommended. If one side has failed, the other is usually worn. Replacing in pairs gives balanced ride height and more predictable handling.

Q3: Do I need coding after installation?
A3: Most W166 vehicles self level after start up and a short drive. A professional suspension calibration with diagnostic equipment is still recommended for best results.

Q4: Does this kit include an air line or fittings?
A4: The product is supplied as a complete rear air bellow. Reuse the original air line, clips and mounting hardware unless they are damaged or corroded.

Q5: How do I confirm this will fit my vehicle?
A5: Compare your VIN and the part number on your old air spring with the OEM references listed above, and make sure your vehicle is equipped with rear Airmatic suspension.