Rear Pair Air Suspension Shocks For Mercedes W220 S320 S430 S500 S600 S55 S65

Air Suspension Structure

5 A220 320 23 38 Air Suspension Strut

5 A220 320 50 13 Air Suspension Strut

5 A220 320 78 13 Hydropneumatic Spring Leg

5 A220 320 79 13 Air Suspension Strut

8 A220 350 02 37 Boot

11 A220 320 91 13 Hydropneumatic Spring Leg

11 A220 320 92 13 Hydropneumatic Spring Leg

15 A220 540 46 08 Wiring Harness

17 A220 352 00 27 Supporting Joint

20 N 000000 003175 Nut

25 N 910105 014017 Hexagon Head Bolt

30 N 000000 003277 Nut

35 A000 327 03 69 Connector

40 A220 323 02 71 Ts Fastening Parts Kit

Item Specifications

Key Words: Rear Pair Air Suspension Shock Struts For Mercedes-Benz S-Class W220 S320 S350 S420 S430 S500 S600 S55 AMG S65 AMG 1999-2006 Compatile With Airmatic(RWD), 4Matic(4WD) and AMG Model.

*Installation Guideline

Please refer to the manual in gallery above.

Replace self-locking nuts and bolts.

See special information on AIRmatic.

1.Use Star Diagnosis to drain struts (41) prior to working on them.

2.Remove rear wheels.

3.Remove cover (arrow) in parcel shelf.

4.Unscrew pressure line connection (41a).

CAUTION: Residual pressure in strut up to 3.5 bar. If residual pressure valve is damaged, replace the strut (41).

*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 rear wheel.

4.Remove the side cover of the rear dash panel to expose the top of the air strut(located in the rear window area).(pictures 1,2)

5.Loosen and remove the 3 mounting nuts from the top of the air strut. Disconnect the air line.(picture 3)

6.Remove rubber boot and disconnect electrical connector leading to the shock damper solenoid.(pictures 4,5).

7.Remove the brake caliper retaining clip.(picture 6)

8.Loosen the two(2)bolts on the backside of the brake caliper.(picture 7)

9.Disconnect the sensor connector and remove the sensor bracket.(picture 8,9)

10.Secure the brake caliper.(picture 10)

11.Disassemble the outer suspension arm.(picture 11)

12.Disassemble the stabilizer bar link.(pictures 12,13)

13.Remove the nut and bolt connecting the strut assembly to the suspension arm.(picture 14)

14.Loosen the lower control arm nut slightly(this will allow the lower control arm to swing down).(picture 15)

15.Remove strut assembly from vehicle.(pictures 16,17)

*Installation Guideline

1.Installation is in reverse order of air strut removal.

Note

Seal off pressure line with blind plugs during repair work.

If pressure line connections or pressure lines are damaged, Repair AIRmatic pressure line connection.

5.Unscrew nuts (41b).

CAUTION: Installation: Fit nuts (41b) and tighten after filling the suspension strut with the vehicle ready to drive.

To facilitate tightening operations and ensure the correct torque on the nuts (41b), it may prove useful to remove the trim from the C-pillars.

6.Separate plug-in wiring connection (Y53x1/Y54x1).

7.Unscrew bolts (72d) for suspension strut cover (72c).

8.Unscrew nut (78c) and press linkage rod (78) from torsion bar (77).

9.Unscrew bolts (41c/41d) connecting strut (41) to track control arm (72).

CAUTION: Installation: Fit nut (41d) and tighten after pressurizing the suspension strut with the vehicle ready to drive.

10.Unscrew bolts (41e/41f) connecting track control arm (72) to wheel carrier.

CAUTION: Installation: Fit nut (41e) and tighten after pressurizing the suspension strut with the vehicle ready to drive.

11.Pull down track control arm (72) and remove strut assembly (41) by lowering it and pulling it out to the side.

CAUTION

Do not damage brake hose.

If replacing or reinstalling the suspension struts (41), check condition of suspension struts and if necessary, Dispose suspension strut.

12.Install in the reverse order.

13.Use Star Diagnosis to recharge the strut (s).

Fill to 5 bar.

CAUTION

During recharging the wheels should never be in contact with the floor; refilling with the suspension compressed leads to destruction of the air spring bellows in the strut (41).

14.Check AIRmatic for leaks.

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.

Includes

Pair for Rear Left & Right Air Suspension Shock Struts

Notes : Please double confirm the compatibility as well as the OEM number before purchasing.

Instruction is not included. Professional installation is recommended.