Arnott Installation Manuals
C-3269
ARNOTT COIL SPRING CONVERSION KIT
FOR MERCEDES-BENZ S-CLASS (W220)

Congratulations on your purchase of an Arnott® air suspension product. We at Arnott Incorporated are proud to offer a high quality product at the industry’s most competitive pricing. Thank you for your confidence in us and our product.

Proper installation is essential to experience and appreciate the benefits of this system. Please take a moment to review these installation instructions before you begin to install these components on your vehicle. The removal and installation of air suspension products should only be performed by a fully qualified, ASE Certified, professional.

It is equally important to be aware of all necessary safety measures while installing your new Air Suspension System. This includes proper lifting and immobilizing of the vehicle and isolation of any stored energy to prevent personal injury or property damage.

"Engineered to Ride, Built to Last®"

C-3269 Arnott Coil Spring Conversion Kit

WARNING: 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 Industries® is committed to the quality of its products. If you have a question or problem with any Arnott product, please contact us by calling +1 321-868-3016 during normal business hours or email techassistance@arnottinc.com (In the EU please call +31 (0)73 7850 580 or email Info@arnotteurope.com).

GENERAL INFORMATION:

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 www.arnottinc.com

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.

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.

WARNING: To avoid the possibility of short circuits while working with electric components consult your owner's manual on how to disconnect your battery.

WARNING: 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.

WARNING: This vehicle contains a “Closed Air Supply System”. Replacement of components requires proper adherence to procedures set forth within OE servicing literature. Failure to comply with the OE prescribed procedures can result in component damage and/or failure.

FRONT AIR STRUT REMOVAL

1. Set steering to straight ahead.

2. Raise the vehicle.

3. Remove front wheels.

4. Disconnect the shock control cable connector located in the fender well. (FIGURE 1)

FIGURE 1
FIGURE 1
FIGURE 1
FIGURE 1

5. Loosen the two (2) set screws (180 degrees apart) located on the bottom of the strut assembly. (FIGURE 2)

FIGURE 2
FIGURE 2

6. Raise hood and disconnect the air supply line to the strut assembly. (FIGURE 3)

FIGURE 3
FIGURE 3

7. Remove the three (3) nuts holding the top mount of the strut. (FIGURE 4)

FIGURE 4
FIGURE 4

8. Separate upper control arm ball joint from the spindle assembly and remove the air strut. (FIGURE 5)

FIGURE 5
FIGURE 5

9. Removal complete.

FRONT COIL STRUT INSTALLATION

WARNING: Tighten all nuts and bolts to manufacturer's specifications during the installation process.

1. Install the strut into the vehicle, being sure to seat the ball joint into the lower mount. (FIGURES 6, 7)

FIGURE 6
FIGURE 6
FIGURE 7
FIGURE 7

2. Reattach the upper control arm to the spindle assembly and reinstall the nut, tightening to manufacturer’s specifications. (FIGURES 8, 9)

FIGURE 8
FIGURE 8
FIGURE 9
FIGURE 9

3. Reinstall the three top shock mounting nuts and tighten to manufacturer’s specifications. (FIGURE 10)

FIGURE 10
FIGURE 10

4. Tighten the two set screws to manufacturer’s specifications. (FIGURE 11)

FIGURE 11
FIGURE 11

5. Installation complete.

REAR AIR STRUT REMOVAL

1. Remove rear wheels.

2. Remove the side cover of the rear dash panel to expose the top of the air strut (located in the rear window area). (FIGURES 12, 13)

FIGURE 12
FIGURE 12
FIGURE 13
FIGURE 13

3. Disconnect the airline and remove the three (3) mounting nuts from the top of the air strut. (FIGURE 14)

FIGURE 14
FIGURE 14

4. Remove rubber boot and disconnect electrical connector leading to the shock damper solenoid. (FIGURES 15, 16)

FIGURE 15
FIGURE 15
FIGURE 16
FIGURE 16

5. Remove the brake caliper retaining clip. (FIGURE 17)

FIGURE 17
FIGURE 17

6. Loosen the two (2) bolts on the backside of the caliper. (FIGURE 18)

FIGURE 18
FIGURE 18

7. Disconnect the sensor connector and remove the sensor bracket. (FIGURES 19, 20)

FIGURE 19
FIGURE 19
FIGURE 20
FIGURE 20

8. Secure the caliper. (FIGURE 21)

FIGURE 21
FIGURE 21

9. Disassemble the outer suspension arm. (FIGURE 22)

FIGURE 22
FIGURE 22

10. Disassemble the sway bar end link. (FIGURES 23, 24)

FIGURE 23
FIGURE 23
FIGURE 24
FIGURE 24

11. Remove the nut and bolt connecting the strut assembly to the suspension arm. (FIGURE 25)

FIGURE 25
FIGURE 25

12. Loosen the lower control arm nut slightly (this will allow the lower control arm to swing down). (FIGURE 26)

FIGURE 26
FIGURE 26

13. Remove strut assembly from the vehicle. (FIGURES 27, 28)

FIGURE 27
FIGURE 27
FIGURE 28
FIGURE 28

14. Removal complete.

REAR COIL STRUT INSTALLATION

WARNING: Tighten all nuts and bolts to manufacturer's specifications during the installation process.

1. Install the shock into the vehicle. (FIGURE 29)

FIGURE 29
FIGURE 29

2. Install the lower shock mounting bolt and nut and tighten to manufacturer’s specifications. (FIGURE 30)

FIGURE 30
FIGURE 30

3. Reinstall the three top shock mounting nuts and tighten to manufacturer’s specifications. (FIGURE 31)

FIGURE 31
FIGURE 31

4. Reinstall the lower control arm nut and bolt and tighten to manufacturer’s specifications. (FIGURE 32)

FIGURE 32
FIGURE 32

5. Reinstall the upper and lower sway bar end link nuts and tighten to manufacturer’s specifications. (FIGURES 33, 34)

FIGURE 33
FIGURE 33
FIGURE 34
FIGURE 34

6. Retighten the inner suspension arm nut and tighten to manufacturer’s specifications. (FIGURE 35)

FIGURE 35
FIGURE 35

7. Reinstall the brake caliper. (FIGURE 36)

FIGURE 36
FIGURE 36

8. Install the brake caliper bolts and tighten to manufacturer’s specifications. (FIGURE 37)

FIGURE 37
FIGURE 37

9. Install the brake caliper clip. (FIGURE 38)

FIGURE 38
FIGURE 38

10. Install the sensor bracket. (FIGURES 39, 40)

FIGURE 39
FIGURE 39
FIGURE 40
FIGURE 40

11. Reinstall the wheel.

12. Lower the vehicle.

13. Installation complete.

ELECTRONIC BYPASS MODULE INSTALLATION

1. Locate the N51 control module (located in the left side fuse box) verify that it reads “TEMIC”. (FIGURES 41, 42)

FIGURE 41
FIGURE 41
FIGURE 42
FIGURE 42

2. After verifying computer, disconnect all three (3) multi-pin connectors permanently. (FIGURES 43, 44)

FIGURE 43
FIGURE 43
FIGURE 44
FIGURE 44

3. Connect light blue connector from electronic bypass module to the wire harness side of the vehicle N-51 can-bus 2 pin connector. (FIGURE 45)

FIGURE 45
FIGURE 45

4. Run the ground wire from the electronic bypass module to the nearest vehicle ground terminal. (FIGURE 46)

FIGURE 46
FIGURE 46

5. Locate an available switched ignition power source in the fuse panel and install the fuse holder (12+V). (FIGURE 47)

FIGURE 47
FIGURE 47

6. Re-install fuse box cover. (FIGURE 48)

FIGURE 48
FIGURE 48

7. Installation complete.

C-3269 REV 2 01/30/2019