2012 Mercedes-Benz E63 gets AMG turbo V8, trees win

AMG's new, 5.5-liter bi-turbocharged V8 impressed us in the CLS63, even if it didn't snarl like the old 6.2-liter naturally-aspirated blaster. Today, the turbo trickled into the midfield, showing up in the E-Class. Better mileage, too, for more greenness.

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