Mercedes has taken the wraps off a new GT4 car that will enter competition in 2018. The Mercedes-AMG GT4 has been unveiled ahead of this weekend's Spa 24 Hours Endurance Cup round of the Blancpain GT Series and will go on sale at a list price of €198,850 (£176,975), excluding taxes. Mercedes has joined a growing roster of manufacturers to sign up for the burgeoning GT4 category, a list that includes BMW, Audi, McLaren and Chevrolet. The new GT4 is based on the Mercedes-AMG GT R road car and retains its twin-turbo four-litre V8 unlike the GT3 version of the car, which is powered by the normally-aspirated V8 from the previous SLS AMG. Mercedes-AMG boss Tobias Moers said: "For us as a manufacturer, GT4 competition is a logical next step to extend our customer racing programme.