Replacing the suspension strut Mercedes S / CL Class W221
Auto repair

Replacing the suspension strut Mercedes S / CL Class W221

22.07.2022 /

This guide provides step-by-step instructions for replacing the air suspension strut on Mercedes-Benz S-Class (W221) and CL-Class (W216) 2007-2013. A class is a failure of an air strut, causing the vehicle to fall into a corner where the strut fails. To fix this problem, you need to replace the failed air strut.

Symptoms

  • Front suspension strut failed
  • Left or right front corner drops when parked
  • One side under the other
  • Car sinking or sinking in a corner

What do you need

Mercedes S Class Air Strut

Replacing the suspension strut Mercedes S / CL Class W221

Note that the front air struts are different for RWD and 4Matic models. The air strut on 4Matic models has a ball joint at the bottom where it connects to the lower arm. Although not a 4matic (rear wheel drive models), the post has a hole in the bottom and uses a set screw.

4MATIC MODELS - Front Air Struts for S-Class/CL-Class

  • W221 Left air shock absorber 4Matic
    • (Valid also for W216
    • Corresponding part number: 2213200438, 2213205313, 2213201738
  • W221 Right air shock absorber 4Matic
    • Also applies to W216 CL models.
    • Related part number: 2213200538 2213200338 2213203213 2213205413

REAR MODELS - Front Valves for S-Class/CL-Class without 4Matic

  • W221 Left air strut without 4Matic
  • W221 Pneumatic strut right without 4Matic

Required Tools

  • Jack
  • Jack stands
  • Инструментарий
  • Front service kit
    • The ball joints will need to be pressed in.
    • Do not use the plug type as the patella protective boots may be damaged

Instructions

Below you will find instructions for replacing the front air suspension on Mercedes-Benz S Class 2007-2013.

  1. Park your Mercedes-Benz, apply the parking brakes, turn the switch to park and remove the key from the ignition. Before lifting the car, loosen the nuts.

    Replacing the suspension strut Mercedes S / CL Class W221
  2. Jack up the car and secure it with jack stands.
  3. Remove the air duct to the top of the air strut. Use a 12mm wrench to loosen the nut. Slowly loosen the nut and allow air to escape before completely disconnecting the line. After the nut is unscrewed, remove the tube by pulling on it.

    Replacing the suspension strut Mercedes S / CL Class W221
  4. Remove the three 13mm nuts connecting the brace to the brace support. We recommend that you do not completely remove the last loosening nut until you are ready to remove the air strut and replace it.

    Replacing the suspension strut Mercedes S / CL Class W221
  5. Disconnect the upper control arm. Remove the 17mm bolt. Then use a ball joint remover to separate them.

    Replacing the suspension strut Mercedes S / CL Class W221
  6. Disconnect the electrical connector from your S-Class air suspension strut and ABS line. Pull up on the small clip C, and then pull out the connector.

    Replacing the suspension strut Mercedes S / CL Class W221
  7. Remove the nut (4matic) or set screw (not only for 4matic/rwd).
  8. You are now ready to replace the air strut on the Mercedes S-Class Install the new S-Class air strut in reverse order.

    Replacing the suspension strut Mercedes S / CL Class W221
  9. Tighten the bolts at the top of the brace, upper and lower suspension arms.
  10. Lower the vehicle slowly. Dropping the vehicle to the ground too quickly can damage the air strut.

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