AdAge reports that Mitsubishi, the carmaker that most enthusiastically embraced online marketing, saw its head of marketing resign. The stepping down of Ian Beavis comes just weeks after Mitsubishi lowered sales estimates by almost a third and just a day after the manufacturer named Bob Martin as head of brand marketing. Beavis joined Mitsubishi only last year in a wide scale management shakeup. Sales through October of this year showed a decline of 36 percent. In a radical move to shake up its marketing, Mitsubishi said last April that it would move about $260 million from TV advertising to other media.