Mercedes is on a mission to replace its models every six years or so. So, with the current generation A-Class turning five years old as of 2017, it was no surprise to us when we saw the next-gen prototype putting in some work somewhere in Europe. Alongside the redesigned hatchback, Mercedes-Benz is also testing a new version of the AMG A45. More importantly, it seems that the German company wants to introduce a new model into the lineup. It’s reportedly called the AMG A40 and will slot below the familiar AMG A45.