You have to remove the rubber bushings to do an adequate inspection for corrosion.
You must inspect the sway bar, especially if the car has been subjected to road salt. Kent will explain in more detail in the video below.
W123 and W126 Front Sway Bar Inspection Kit
$14.75
SKU:
SRS-SWAYBARINSPECT Product Details
This kit contains new rubber bushings, two new stainless bolts, and a tube of blue thread locker. Always use a thread locker when installing these bolts. If you find corrosion that is not too bad, clean and coat it with miracle paint before installing the new bushings. We recommend installing a rod end repair kit if the corrosion is severe. See related products below.