Date registered: Aug 2009
Vehicle: '85 300D - 381K and increasing daily
Location: Youngstown, OH
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
79mercy's on it. that would be your servo (or actuator) for your cruise control. theres a vac line, a bleed line, and a 2-wire connector at the bottom on the inboard side. your tempomat amplifier (the big tin box above the brake pedal) modulates the amount of vaccum the servo pulls, holding the throttle to maintain a set speed regardless of load. these components are notorious for being schizo, btw.