A-2724
ARNOTT REAR AIR SPRING
FOR 2003-2009 MERCEDES-BENZ E-CLASS
FOR 2005-2011 MERCEDES-BENZ CLS-CLASS
(EXC. AMG)
If replacing an O.E. unit with an Arnott Air Spring you MUST replace both rear air
springs at the same time.
Replacing just one O.E. spring with the Arnott designed air spring may result in a
slight difference in heights between the O.E. side and new air spring side. This is due to
the vehicle’s ride height sensor reading different pressures in the new and O.E. springs
and automatically making adjustments for that. This does not occur if you replace both
sides at once.
The A-2724 Eliminates The Need For An Air Reservoir.
Arnott® is committed to the quality of its products. If you have a question or problem with any Arnott product, please contact Arnott by calling 800-251-8993 during normal business hours or email
The air suspension system is under pressure (up to 10 bar, or 150 lbf/in). Verify pressure has been relieved and disconnect power to the air suspension system prior to disassembly. Do not allow dirt or grease to enter the system. Always wear standard hand, ear, and eye protection when servicing the air suspension system.
Arnott® is committed to the quality of its products. If you have a question or problem with any Arnott product, please contact Arnott by calling 800-251-8993 during normal business hours or email
Reading this manual signifies your agreement to the terms of the general release, waiver of liability, and hold harmless agreement, the full text of which is available at
Not to be stored below 5°F (-15°C) or above 122°F (50°C).
Avoid damage to air lines and cables.
Removal and installation is only to be performed by fully qualified personnel.
Use car manufacturer’s diagnostic software.
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.
To avoid the possibility of short circuits while working with electric components consult your owner's manual on how to
disconnect your battery.
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.
The air spring(s) contains a solenoid valve. Once inflated, only the “Mercedes DAS Star” diagnostic computer can deflate
the air spring(s).
1. Set the steering to straight ahead.
3. Remove the rear wheels. (FIGURES 1, 2)
4. Locate and remove the electrical plug from the air spring's top mount. (FIGURE 3)
5. Locate and remove the air line from the air spring's top mount using a Mercedes socket wrench (211 589 00 90 00) or other suitable method. (FIGURES 4, 5)
6. Loosen and remove the lower shock mounting nut and bolt. (FIGURE 6)
7. Loosen and remove the rear control arm nut and bolt. (FIGURE 7)
8. Dislocate the air spring’s top mount from the vehicle. (FIGURE 8)
9. Loosen and remove the air spring’s lower mounting nut and bolt. (FIGURE 9)
10. Remove factory air spring from the vehicle by disconnecting the factory rubber hose leading from the air spring
to the air spring’s reservoir. Secure the hose in a suitable location away from any moving parts or components
with excessive heat. (FIGURE 10)
Tighten all nuts and bolts to manufacturer's specifications during the installation process.
Arnott Air spring(s) contain a solenoid valve. Only the “Mercedes-Benz DAS Star” diagnostic computer software can
inflate the air spring(s).
1. Installation is in reverse order of air spring removal, with the exception of the secured reservoir hose.
It is recommended to have your vehicle aligned after installation is completed.