SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

SL/R230: Ball joint for air suspension needed?

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Old May 13, 2020 | 10:51 AM
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From: South West
2003 SL55, 2004 E320 CDI Estate
Ball joint for air suspension needed?

Hi - my SL55 failed its MOT (inspection) today due to some play in the suspension bushes. The actual bush is on the bottom of the front air spring I've circled in in red.



Im shocked to hear Mercedes dont sell this bush. I also called Arnott and they wont sell the bushing they press into their units. I only have play on one side but clearly I don't want to replace just one bush. I don't think I can replace with a single Arnott spring but I could be wrong about that.

Does anyone know if this bush can be replaced or if the air spring(s) need replaced as a unit.

Last edited by Rawhide; May 13, 2020 at 11:59 AM.
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Old May 13, 2020 | 12:11 PM
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SL500 2009
Rawhide,

If you search for "abc strut ball joint repair" on Google you will get some places that fix the joint.
The system is hydraulic not air.
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Old May 13, 2020 | 12:16 PM
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2003 SL55, 2004 E320 CDI Estate
Having done some further research I'm learning;

1) It may be possible to fit a BMW(!) ball joint into the strut. Further checks to be done on this but maybe possible if not advisable
2) SL350 strut is much cheaper and the ball joint could be cut out from the new unit and pressed into the old strut.
3) It is possible to replace the front ABC spring with a single Arnott unit. However I've been advised against it by an Indy as he's had problems with Arnott ABC struts (not air suspension) before.

I'm now considering those ebay strutt rebuild services to see if they have ball joints or could offer a strut repair service.
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Old May 13, 2020 | 12:32 PM
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2003 SL55, 2004 E320 CDI Estate
Originally Posted by DavidCA
Rawhide,

If you search for "abc strut ball joint repair" on Google you will get some places that fix the joint.
The system is hydraulic not air.
Thanks - very handy. I'm trying a few places now.
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