It’s been a while since Mercedes-AMG last had a Black Series in its lineup but a new one could now be brewing.

A prototype for AMG’s new E63 Wagon is featured in this video from YouTube user walkoART – Videos, but the tester is sporting some modifications that suggest it may be for an even more extreme version of the upcoming car, potentially a Black Series.

The prototype has much wider fenders front and rear compared to previous prototypes for the new E63 Wagon, shown below. Its wheels are also slightly wider.

2017 Mercedes-AMG E63 Wagon (Estate) spy shots - Image via S. Baldauf/SB-Medien

2017 Mercedes-AMG E63 Wagon (Estate) spy shots - Image via S. Baldauf/SB-Medien

It may be that we’re looking an early mule for an entirely different vehicle. Then again, we know AMG bosses are seriously considering adding an E63 Black Series to the lineup. The smaller C63 is also likely to receive the Black Series treatment, along with the new GT sports car.

We should have more details soon as the new E63, in sedan form, is expected to debut late next month at the 2016 Paris auto show. The new E63 Wagon should follow next March at the 2017 Geneva auto show. Any Black Series would likely trail the regular versions by about a year.   

According to recently leaked info, the new E63 will come with 563 horsepower and 553 pound-feet in standard form and 603 hp and 627 lb-ft in sportier E63 S trim. Both will receive their power from AMG’s twin-turbocharged 4.0-liter V-8 and divert it to all four wheels via a 9-speed automatic transmission. Any Black Series would have to deliver well in excess of 600 horses.