2005-2011 Mercedes-Benz CLS 500 4 Wheel Conversion Kit Installation Manual

Take a look at our easy-to-follow 2005-2011 Mercedes-Benz CLS 500 4 Wheel Conversion Kit Installation Manual to learn how to install your new Strutmasters air suspension conversion kit. Our step-by-step instructions include pictures to help you along the way.

Mercedes-Benz CLS 500 parts included in this kit:

  • MJ14F: 2 Coilover Strut Assemblies, 2 Eibach coil springs, 2 mounts, 2 pucks, and 2 gas/hydraulic shocks.
  • MJ14FM: 2 Coilover Strut Assemblies, 2 Eibach coil springs, 2 mounts, 2 pucks, and 2 gas/hydraulic shocks, and a suspension light disarm module.

Getting Started

  1. Disconnect Battery
  2. Read general service precautions
  3. Wear Eye Protection
  4. Support the vehicle
  5. Remove air suspension parts
  6. Install conversion kit

Tools needed for installation:

  • Metric sockets
  • Metric wrenches
  • Floor jack or vehicle lift
  • Level work surface
  • Jack stands
  • Screw drivers (Phillips and Flat-Head)
  • Allen wrenches and metric torque bits.
  • Pry Bar
  • General Tools

Front OEM Strut Removal InstructionsStep 1

Caution: A sudden release of pressure may cause personal injury or damage to the vehicle. The air suspension system is under pressure until the air supply lines are disconnected. Use the following precautions when servicing the air suspension system: Wear gloves, ear protection, and eye protection. Wrap a clean cloth around the air supply lines. The vehicle must be raised to perform this conversion! Use proper lifting equipment only! Read instructions carefully before attempting installation, if you have problems during the install then feel free to call our Technical Support Line. Please before calling for technical help, have your invoice handy.

  1. Raise vehicle enough to remove front wheels, then support.
  2. Going under the hood, remove the air line attached to the top of the strut. See Fig 1.
  3. Unplug the electrical connector from the strut. See Fig 2.
  4. Remove the three stud nuts from the top of the strut. Then raise vehicle to work in wheel well. See Fig 3.
  5. Remove the front wheel well liner to access the struts wiring connector. See Fig 4.
  6. Follow the electrical wire at the base of the strut back to the connector that was behind the wheel well. See Fig 5.
  7. Disconnect the connector. See Fig 6.
  8. Replace the wheel liner.
  9. Support the lower control arm and then separate the upper control arm to spindle arm ball joint. See Fig 7.
  10. Remove the lower strut mounting bolt. See Fig 8.
  11. Remove strut from vehicle, and repeat steps on opposite side.

Front Conversion Kit Installation InstructionsStep 2

  1. Remove the three nuts and washers from the top of the new strut.
  2. Place top of strut up through the upper control arm and align studs to fit into the existing holes. See Fig 1.
  3. Push strut up so that studs protrude through mounting holes, Replace the black support plate. See Fig 2 & Fig 3.
  4. Install washers and nuts on the studs but do not tighten yet.
  5. Align the lower strut mounting fork over the lower control arm.
  6. Raise lower control arm enough to install original bolt; tighten bolt. See Fig 4.
  7. Continue raising the lower control arm to connect the spindle arm back to the upper control arm ball joint; tighten ball joint nut. See Fig 5.
  8. Tighten the three upper strut studs.
  9. Double check that all nuts and bolts are tight.
  10. Install wheel and torque to factory specs.
  11. Repeat steps 1-10 on opposite side to finish installation.

Front installation now complete.

Rear Air Bag & Shock Removal InstructionsStep 3

  1. Before raising car access the trunk and remove the upper shock mounting nut. Located under the side trim panels. See Fig 1 & Fig 2.
  2. Raise vehicle and support, then remove wheel.
  3. Remove the wheel well liner enough or fully to locate the shocks wiring plug. See Fig 3.
  4. Follow the electrical wire from the base of the shock back to the plug in the well. See Fig 4.
  5. Remove the wire retaining clip and then remove the plug to the shock. Replace the clip to hold the other plug in place. See Fig 5 & Fig 6.
  6. Remove lower shock bolt and remove shock.
  7. Remove or cut the small air line from the top of the air bag. (CAUTION) Control arm may rise up if bag is still pressurized. See Fig 7.
  8. Support lower control arm with floor jack or appropriate stand.
  9. Remove the lower sway bar link bolt and locator arm bolt. See Fig 8.
  10. Remove the track bar bolt. See Fig 9.
  11. Remove lower control arm to wheel carrier bolt. Pry carrier from control arm. (CAUTION: Pry carrier just far enough to clear control arm. Any further may damage CV joint. See Fig 10).
  12. Loosen the inner control to frame to allow the control arm to drop down. See Fig 11.
  13. Remove air bag lower bolt from control arm. Pull bag out from lower control arm. Pull bag down from upper mount to access large black air hose. See Fig 12.
  14. You will need to cut the large black air line to remove the bag. (CAUTION: Pressure may still exist inside the bag. Wear eye protection). Remove bag as in Fig 13.
  15. Repeat steps 1-13 for opposite side of vehicle.

Rear Conversion Kit Installation InstructionsStep 4

  1. Install lower spring mounting plate into the lower control arm using the original bolt from the air bag. Leave this bolt loose. See Fig 1.
  2. Install the supplied allen bolt into the smaller hole on the control arm and tighten, then tighten the large bolt. See Fig 2.
  3. Ensure rubber spring isolator is placed over the black puck with the step facing the inside of the car. See Fig 3.
  4. Place the thin black locating puck on the small end of the spring. (Note the ridge that fits into the spring has the smaller diameter. See Fig 4).
  5. Spring will be installed with the writing upside down.
  6. Install spring up into car, the hole in the puck will fit over the locating pin on the upper frame. See Fig 5 & Fig 6.
  7. Make sure the rubber spring isolator is in the lower spring plate with step facing inside of car. Push control arm down then align the spring end to fit into the step, see Fig 7. (Note the large end of spring is at bottom with the lettering upside down).
  8. With spring in position in car use a jack or suitable stand to raise the lower control arm up to about horizontal to reinstall wheel carrier, see Fig 8. Note that with the vehicle in the air, the rear springs will be curved looking, but this will line up correctly as the car is set on the ground .
  9. Before reinstalling carrier you must move the slide collar in the carrier back so that it’s flush in the housing. To do this use a socket and an extension and drive the collar back with a small hammer. See Fig 9 & Fig 10.
  10. Install carrier onto control arm, replace bolt and tighten. Also tighten inner control arm bolt at frame.
  11. Reinstall remaining suspension components in reverse order and tighten to factory specs.
  12. Make sure the remaining air lines are tied back away from any moving or hot parts.
  13. With suspension components reassembled and control arm hanging down, install the new shock into the lower control arm using the washers supplied as spacers along with the original bolt. Tighten bolt.
  14. Using the jack raise the control arm up and guide the top of the shock into the mounting hole. Then install upper shock hardware inside the trunk and tighten. See Fig 11.
  15. Ensure all bolts are tight.
  16. Replace the wheel liner.
  17. Install wheel and torque lug nuts to factory specs.
  18. Repeat steps 1-17 for opposite side of vehicle.

Conversion Kit install is now complete.

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