If Mercedes won’t AMG your GLK, you’ve just got to do it yourself. They started by removing the GLK’s standard 3.5-liter V6 and replacing it with a 5.5-liter V8 from a 2010 E550.

GLE-Class (including the four-door GLE-Class Coupe), GLK-Class, and G-Class. Available engines include turbocharged four-cylinder, V-6, V-8, and diesel. Chassis layouts can be front-, rear-, or ...

The company offers the GLA-Class, GLK-Class, M-Class, and G-Class. Available engines include turbocharged four-cylinder, V-6, V-8, and diesel powertrains. Drivetrain layouts can be front-, rear-, or ...