Does anyone know what the throttle plate in the intake is for? I have heard that some 240D did not have one. I have never seen a diesel with a intake restrictor throttle plate on it before. Could it have something to do with emissions or efficiency?
The older Mercedes Diesels that had Fuel Injection Pumps with Pneumatic Governors have a Buttery Fly Valve (Throttle Plate) in the Intake Manifold to create vacuum to operate the Governor.
On those models you would also find a tube or Hose going from the Intake Manifold to the rear of the Fuel Injection Pump where the Governor is.
BenzWorld.org forum is one of the largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the world. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more!