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DIY: How To Replace Rear ABC Struts on a 2003-2012 Mercedes-Benz SL

This guide is for customers installing the Arnott SK-2414 Rear Right ABC Strut and Arnott SK-2415 Rear left ABC Strut for the 2003-2006 SL500, 2003-2008 SL55 AMG, 2007-2012 SL550, 2003-2009 SL600, 2009-2012 SL63 AMG, and 2005-2012 SL65 AMG

The removal and installation of air struts on the Mercedes Benz R230 chassis SL can be performed by a skilled do it yourselfer at home. If you are unsure of your abilities or not in possession of the required tools, seek the help or guidance of a professional. All information is for informational purposes only and should be taken as helpful hints and visualizations, not a comprehensive guide. Your vehicle may be equipped or modified with additional equipment not shown or mentioned.

Removal

  1. The Mercedes ABC air suspension system may be under up to 150 lbs/in of pressure, disconnect power to air ride system and verify that air pressure has been relieved before disassembling.
  2. Raise Vehicle and set steering straight ahead, remove wheels. Remove trunk material to gain access to tops of struts.
  3. Disconnect electrical connector from strut and remove two top nuts.
  4. Remove bottom strut bolt and suspension arm.
  5. Remove brake caliper.
  6. Remove bottom control arm bolt attached to spindle and pry lower control arm from spindle assembly.
  7. Disconnect hydraulic line.
  8. Push down on lower control arm and remove strut from vehicle.

Installation

  1. Remove top two nuts and hose dust cap from new strut.
  2. Push down on lower control arm to create enough space to fit new strut in place on the vehicle.
  3. Reconnect hydraulic line.
  4. Install bottom strut bolt and nut.
  5. Line up bottom control arm bushing with spindle assembly and bolt hole, then install bolt.
  6. Reattach suspension arm and tighten bolt.
  7. Reinstall brake caliper.
  8. Install top two nuts and electrical connector to strut.
  9. Replace wheels and trunk material

Note: The Mercedes-Benz SL ABC air strut contains a solenoid valve that requires use of the Mercedes DAS Star diagnostic computer for inflation.

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