Looks like this (the second one):
http://www.*********.com/catalog/1979/mercedes/240d/suspension/sway_bar_link.html

Sway Bar link...but without the ball joints on either side.

__________________
1987 300TDT - 195,000 (Original #14 head)
1993 190E 2.3 - 105,000
1981 300D - 250,000