Quick Detail 

Fitment:

for Mercedes GL-Class X166 2012-2019

for MercedesGL-Class X166 GL320 4 Matic

for Mercedes GL-Class X166 GL350 CDI 4 Matic

for Mercedes GL-Class X166 GL400 4 Matic

for Mercedes GL-Class X166 GL450 4 Matic

for Mercedes GL-Class X166 GL500 4 Matic

for Mercedes GL-Class X166 GL550 4 Matic

for Mercedes GL-Class X166 GL63 AMG

for Mercedes GLS-Class X166 2015-2019

for Mercedes GLS-Class X166 GLS320 4 Matic

for Mercedes GLS-Class X166 GLS350 4 Matic / BLUETEC

for Mercedes GLS-Class X166 GLS350 CDI 4 Matic

for Mercedes GLS-Class X166 GLS400 4 Matic

for Mercedes GLS-Class X166 GLS450 4 Matic

for Mercedes GLS-Class X166 GLS500 4 Matic

for Mercedes GLS-Class X166 GLS550 4 Matic

for Mercedes GLS-Class X166 GLS63 AMG

OE Number:

1663202513 / A 166 320 25 13 / A1663202513

1663207313 / A 166 320 73 13 / A1663207313

1663204966 / A 166 320 49 66 / A1663204966

Size and Quality:OEM standard

Air Suspension System Components
Early versions of air suspension systems were relatively simple. Air bags replaced the coil springs. The bag was inflated to the correct pressure or height with an outside compressor through a valve on the bag. Changes in technology and use added more components, and control, to the system. But today's air suspension systems all have a basic stock of similar components that vary little from maker to maker. The differences come mainly in controls and ease of installation.
Air bag material has changed little over time. The bag is a composite of rubber and polyurethane, which provides structural integrity, air-tight construction, toughness against light abrasion from road debris and sand, and resistance to salt and chemical corrosion.
The bags come in three basic shapes:
·Double-convoluted bag. This bag is shaped like an hourglass. The design allows for a little more lateral flexibility than the other designs.
·Tapered sleeve. This air bag performs the same as any other but is designed to fit in a tighter area and offers a little more adjustability on ride height.
·Rolling sleeve. This is also a specific-application air bag. The pertinent differences between the two sleeves are really about ride height and spring control, and what's best for the vehicle and the application.
Most air suspension systems now come with an on-board compressor. The compressor is an electric pump feeding air to the bags through a series of compressed air lines. The compressor is generally mounted on the vehicle's frame, or in the trunk. The vast majority of compressors come with an attached drier. The compressor works by drawing outside air into the pump, compressing it and moving it to the bags. Outside air is often laden with moisture, and moisture can wreak havoc in a closed system. The drier uses a substance known as a desiccant to absorb as much moisture from the air as possible before the air is sent through the system.
Simpler compressor systems rely on the compressor itself to maintain, increase or decrease pressure. More advanced systems add an air tank to maintain pressure and provide an even transition between pressures. Compressors can be activated manually or automatically, and controlled solely by the driver, automatically through an electronic system, or a combination of both.

Note:
1. 12 month warranty
2. 100% quality testing before shipping.We will provide you excellent customer service and 100% satisfaction warranty.
3. Please note that we do not be responsible for any customers fee which is charged by your country.
When you take the order ,it means the buyer has agreed clearly all of our terms.If not ,please contact us before order.
Instruction is not included. Professional installation is recommended. We are not responsible for the warranty because of Artificial damage and Improper installation. Please provide photos or videos to apply for warranty. If you are not sure whether our parts fit your car please provide the VIN number of your car,we will confirm for you.