*Compatibility Chart
1, You can distinguish specific model of an automobile by VIN(Vehicle Identification Number).
2, VIN(Vehicle Identification Number) consists of total 17 English letters and arabic digits.
3, VIN does not include the letters I (i), O (o), and Q (q) (to avoid confusion with numerals 1 and 0).
Mercedes Benz S-Class W221
S350 Bluetec4MaticSedan 4-Door 3.0L 2012-2013
S4504MaticSedan 4-Door 4.6L 2008-2011
S5504MaticSedan 4-Door 4.6L 2012-2013
S5504MaticSedan 4-Door 5.5L 2007-2011
Mercedes Benz CL-Class C216
CL5504MaticCoupe 2-Door 4.6L 2011-2013
CL5504MaticCoupe 2-Door 5.5L 2009-2010
Important Fitment Notes(Must Read):
For With 4MATIC (AWD) Suspension Only.
NOT fit on Vehicles Equipped with Base RWD or Active Body Control(ABC) Suspension Models
*Air SuspensionStructure:
10 A221 320 04 38 Air Suspension Strut
10 A221 320 05 38 Air Suspension Strut
10 A221 320 17 38 Air Suspension Strut
10 A221 320 18 38 Air Suspension Strut
20 A001 990 32 14 Bolt
30 A221 540 72 08 Wiring Harness
40 A000 327 03 69 Connector
50 A221 320 79 13 Hydropneumatic Spring Leg
50 A221 320 80 13 Hydropneumatic Spring Leg
60 A221 997 03 52 Hose
60 A221 997 04 52 Hose
65 A015 997 82 45 O-Ring
70 N 000000 003047 Hexalobular Bolt
70 N 000000 008043 Hexalobular Bolt
100 A221 330 00 85 Rs Collar
110 N 000000 005267 Nut
120 A221 327 02 95 Reinforcement
130 N 000000 003277 Nut
*Generation &Evolution:
Mercedes-Benz S-Class
W116 First generation (1972-1980)
W126 Second generation (1980-1991)
W140 Third generation (1991-1998)
W220 Fourth generation (1998-2005)
W221 Fifth generation (2006-2013)
W222 Sixth generation (2014-present)
Mercedes-Benz CL-Class
C140 First generation (1992-1999)
C215 Second generation (1999-2006)
Chassis Coupé of Mercedes-Benz S-Class (W220)
C216 Third generation (2006-2014)
*Platform Drive Layout:
4MaticModel-FourWheel Drive Layout
*Removal Guideline:
Caution: Damage to the vehicle and air suspension system can be incurred if work is carried out in a manner other than specified in the instructions or in a different sequence.
1.To avoid the possibility of short circuits while working with electric components consult your owner\'s manual on how to disconnect your battery.
2.Consult your vehicle owner\'s manual, service manual, or car dealer for the correct jacking points on your vehicle and for additional care, safety and maintenance instructions. Under no circumstances should any work be completed underneath the vehicle if it is not adequately supported, as serious injuries and death can occur.
1.Set steering to straight ahead.
2.Raise the vehicle.
3.Remove front left or right wheel.(picture 1)
4.Locate the air strut\'s wiring block inside the wheel well. Remove the metal retaining clip and the two(2)electrical plugs.(pictures 2,3)
5.Cut the cable tie and remove the wiring bracket from the air strut.(pictures 4,5)
6.Loosen and remove the lower mounting nut.(picture 6)
7.Separate the lower ball joint from the lower control arm.(picture 7)
8.Loosen and remove the air line from the top of the air strut.(picture 8)
9.Loosen and remove the three(3)top mounting nuts.(picture 9)
10.Remove the air strut from the vehicle.(picture 10)
11.Remove the offset plate from the top of the air strut.(picture 11)
12.Removal complete.
*Installation Guideline:
Installation is in reverse order of air strutremoval.
*Frequently Asked Questions:
How to prevent the damage of air springs/How to extend the service life of air springs/struts etc.?
An air strut with separable air springs
If your vehicle offers a separable air suspension (Audi Allroad A6 C5, Mercedes-Benz W164, BMW X5, etc.), you should regularly (about once a week) lift the car to the maximum position, and remove dirt with a high-pressure cleaner (keep the cleaner at a distance to the air spring about 30 cm/12 inches, otherwise water pressure can damage the air spring). The highest position may vary depending on your model and regulation options. Therefore, please test this by trying the different modes available to you (Sport, comfort, dynamic, off-road) and choose the one that sets your vehicle to the highest position. The dirt will most likely be found under the fold of the pneumatic chambers. If you find a frozen layer of bitumen on the piston guide (the part of a strut on which the air spring is installed), it is recommended to clean it as well. Whenever possible, avoid riding on fresh asphalt, as fresh bitumen mixed with sand immediately results in a build-up of abrasives on the piston and in turn contributes to accelerated wear and tear of the air spring.
A complete air suspension shock
Many cars such as Mercedes W220 or W211 are set up with a complete air strut - shock absorber and air spring visually form a complete spare part. In many cases, you can easily recognize these by the metal cups with which the air spring is tightly mounted. To best avoid any damage, we highly recommend to regularly check the condition of the dust protection seals of the air strut.
What is the difference between an air spring and an air strut?
The air spring is a part of the air strut. Some vehicles (e.g. Mercedes ML) allow you to change the air spring separately. At our online shop you have the opportunity to buy either the whole air strut or only the air spring. For some type of vehicles it is not possible to change the air spring separately. In this case the whole air strut should be replaced.
Which side of my car is the Right and Left?
The right and left sides of an automobile are determined as if sitting in the car facing forward. Thus, the left side is on the left when sitting in the car facing forward, and the right side is on the right. For American cars, the driver’s side is on the left, and the passenger sits to the right of the driver. For cars in Japan, Britain, Ireland, the Bahamas and some other former British colonies -- where they drive on the left side of the road -- the passenger sits on the left side, and the driver (along with all the driving controls) is on the right.
What does 4MATIC mean?
4MATIC is the marketing name of a four-wheel drive system developed by Mercedes-Benz. It is designed to increase traction in slippery conditions.
What does AIRMATIC mean?
AIRMATIC is a Mercedes-Benz trademark for vehicles with air suspension systems. Compared with a conventional steel suspension, the AIRMATIC air suspension provides advantages in terms of handling safety and ride comfort. The AIRMATIC air suspension automatically adjusts the damping force on each wheel according to the current state of the road.
What does ABC mean?
ABC (Active Body Control) is a registered Mercedes-Benz trademark. It is a high-quality suspension system, which automatically adapts the suspension setting to the respective driving situation. There is also a crosswind stabilisation integrated in ABC systems.
How can I see if my vehicle is equipped with AIRMATIC or ABC?
You can check which suspension you have by opening the bonnet of your car and examining the top of the shock absorber.
If your vehicle is equipped with AIRMATIC, you will have obvious air lines leading from the top of the shocks:
If your vehicle is equipped with ABC, you will have small black electrical plugs leading into the top of both shocks:
*OEM Part Number:
*Item Specifications:
- Key Words: Front PairAir Suspension ShockStrutsFor 4MaticMercedes S-Class W221S350 S450 S550 2008-2013 4MaticCL-Class C216 CL550 2009-2013
- Package Includes:Pair for Front Left & RightAir Suspension Shock Struts
Notes: Please double confirm the compatibility as well as the OEM number before purchasing.
Instruction is not included. Professional installation is class=\'pacp\'>
