A prototype for what’s thought to be a Black Series version of the next-generation Mercedes-AMG E63 has been spotted. The prototype features the new E63 Wagon’s body but is wearing some extra-wide fenders.

Infiniti will be the first major automaker to introduce an engine with variable compression technology. The engine is expected to debut in 2018 in the next-generation QX50, a vehicle previewed by the recent QX Sport concept car.

Koenigsegg’s first model designed to be street-legal in the United States will be presented at this week’s Monterey Car Week. The car is an Agera RS that its owner decided to badge an Agera XS. The owner also selected the biggest rear wing of any Koenigsegg built to date.

You'll find all of these stories and more in today's car news, right here at Motor Authority.

Possible Mercedes-AMG E63 Black Series spied

Infiniti confirms variable compression engine

First U.S.-spec Koenigsegg Agera RS to land in Monterey

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