Those are pad wear sensors.

The ABS is a cable with a reluctor sensor on the end. Held with one mouinting bolt.

http://catalog.peachparts.com/ShopByVehicle.epc?q=1985-Mercedes--Benz-380sl-Brake&yearid=1985%40%401985&makeid=63%40%40MERCEDES+BENZ%40%40X&modelid=6256%3AMBC%7C1528%3AED%7C10000052%40%40380SL&catid=241658%40%40Brake&subcatid=241755@@ABS+Speed+Sensor&mode=PA

__________________
A Dalton