Mercedes (84-93 Diesel) Belt Tensioner Shock OEM Stabilus Brand new Belt Tensioner (pneumatic Shock Type, not spring type) part# 604 200 01 14, by OEM Stabilus, fits: 124: 300D 2.5 turbo 126: 300sdl, 350sd, 350sdl 201: 190d 2.2/2.5/2.5-t