Auto Spare Part A1663201313 Front Left Suspension Air Strut For Mercedes Benz ML

Auto Spare Part A1663230300 Rear Left Suspension Air Strut For Mercedes Benz ML-Class W166

Product Description

GUOMAT NO.505031 Air Suspension OE Part Number

A1663201313

A 1663201313

A 166 320 1313

A 166 320 13 13

A1663230300

A 1663230300

A 166 323 0300

A 166 323 03 00

A1663206713

A 1663206713

A 166 320 6713

A 166 320 67 13

A1663206913

A 1663206913

A 166 320 6913

A 166 320 69 13

F309513901

F 309513901

Advantages

1, Improve the ride comfort of the vehicle;

2, Improve the stability of vehicle driving control;

3, Enhance the vehicle driving power and braking force on bumpy road;

4, The body height remains the same, will not increase or decrease with the load, reduce or increase;

5, Prolong the service life of tires and brake discs;

6, Reduce electrical, air conditioning, exhaust system, bridge, body and chassis maintenance costs;

7, Prolong the service life of the vehicle and increase the depreciation value.

How Do I Know if My Aair Struts are Bad?

Here are the key signs that your air struts (or air springs) are failing or already bad:

1.Uneven Ride Height (Sagging):

Most Obvious Sign: One corner (front left, front right, rear left, rear right) of the vehicle sits noticeably lower than the others, especially after sitting overnight or for a few hours. The whole front or rear end might sag.

Visual Check: Park on a level surface and step back. Compare the wheel gaps (distance between tire and fender) on all four corners.

2.Suspension Warning Light/Messages:

Most vehicles with air suspension have a dedicated warning light (often looks like a car with squiggly lines underneath or arrows pointing up/down at the wheels) or a message on the instrument cluster (e.g., "AIR SUSPENSION FAULT," "LEVEL CONTROL INACTIVE," "SUSPENSION RIDE HEIGHT LOW"). This is a major red flag.

3.Excessive Compressor Run Time:

You hear the air compressor running much more frequently than usual, especially immediately after starting the car or when parked on level ground. It might run for unusually long periods trying to maintain pressure due to leaks.

The compressor might cycle on and off repeatedly while driving.

4.Hissing Sounds:

Audible hissing or air leaking sounds coming from the wheel wells, especially noticeable when parked after a drive or when the compressor is running. This indicates a leak in the strut's bladder, a line, or a fitting.

5.Poor Ride Quality:

Rougher Ride: The suspension feels significantly harsher over bumps, transmitting more impact into the cabin. The air spring isn't cushioning properly.

Bouncy Ride: The car bounces excessively after hitting a bump instead of settling quickly (though this can also indicate worn shocks inside the air strut assembly).

Feels "Boaty" or Unstable: Excessive body roll in corners, nose-diving under braking, or rear-end squatting during acceleration can occur if the system can't maintain pressure and firmness.

6.Vehicle Doesn't Lift (or Lifts Slowly):

When using a lift/height adjustment setting (if equipped), the vehicle struggles to rise, rises unevenly, or takes an excessively long time to reach the desired height. It might not lift at all at the affected corner.

7.Vehicle Drops Quickly After Shutoff:

The vehicle visibly sinks down much faster than normal (within minutes) after you turn off the engine and exit.

8.Handling Feels Imprecise or "Sloppy":

The steering feels vague, the car wanders more on the highway, or it generally feels less planted and secure during maneuvers. This is due to inconsistent ride height and pressure affecting alignment and damping.

9.Visible Damage:

Cracks/Dry Rot: Inspect the rubber air bladder (looks like a large black or grey accordion-style bellows) for cracks, deep cuts, or signs of dry rot/weathering.

Oil Leaks: Air struts often have a hydraulic shock absorber integrated inside. If you see oil leaking from the strut body (especially the shaft seal), the strut part is failing, even if the air spring part holds pressure.

Damaged Lines/Fittings: Check the air lines leading to the strut for cracks, abrasions, or disconnected fittings.