I put W124 300CE Sportline ARB's (front & rear) on a W124 200.
They are 4mm thicker front & rear than my standard ones, the outcome is amazing in the dry its added 10MPH when cornering!
In the wet though I get major over-steer witch is pretty cool but dangerous when trying to take a roundabout.
I think you posted me the link for some second hand ARB's on eBay...
Yep just checked & it was you that got them for me... Thanks!