W210/OM606.962 EGR Delete
W210/OM606.962 EGR Delete
How does that article contradict anything that was said above? To summarize: EGR reduces NOx on all engines. However any fuel economy benefits are limited to throttled vehicles (gasoline). The benefits come from reducing the intake manifold vacuum that the engine has to work against by filling the intake manifold with inert combustion gasses.