Air Spring: Service and Repair

Removing
^ Remove suspension strut first
^ Mark position of shock absorber- air spring piston - mounting bracket.
^ Remove mounting bracket





^ Unscrew nut -1-
^ Use new nut
Tightening torque: 60 Nm
^ Remove air-spring bellow upward.

Installing
Installation is the reverse of removal.





^ Coat rubber sealing ring -2- with G 052 150 A2 lithium lubricant.
^ Align shock absorber - air spring piston - mounting bracket. according to mark.
^ Be sure auxiliary spring is properly seated in cover
^ Lower rubber sealing ring must be dry and dust-free.
Lower rubber sealing ring must be placed on the second step of the strut tube from the top.





^ Place air-spring on rubber sealing ring and press downward.

Note: Air spring must not cant when pressing down

With sliding motion of piston, rubber sealing ring rolls up to the 3. offset on which the spring supports itself and seals.





Dimension between the center bore for air-spring/control arm bolts and the lower end of air-spring must be less than 262 mm before filling.
^ Check lateral movement of piston.
It must not be possible to twist air-spring strut.
^ Install mounting bracket
^ Install suspension strut





^ Hold suspension strut only at mounting bracket and strut tube as shown in illustration.