Additional Air Intake

This system is utilized only on models 280 SE and 600. When correct conditions are met, an additional supply of air is delivered to the engine by the gulp valve through the supplementary air line from the air filter. All of the conditions below must be present:

1. Oil Temperature above 17°C (63°F).
2. Accelerator pedal in idle position.
3. Engine speed at time of deceleration over 2900 RPM (280 SE only).
4. Transmission in 3rd or 4th gear (600 only).
   Fig 1: Two-Way Valve & Gulp Valve (280 SE & 600)

   Courtesy of MERCEDES-BENZ USA