The 2012-2016 Mercedes-Benz GL 63 AMG (X166) is a luxury SUV that pairs high-performance with spacious comfort. Powered by a twin-turbo V8 engine, this premium model offers exhilarating acceleration, advanced features, and enough space for a full family. However, despite its exceptional engineering, it’s not without its share of common issues. In this article, we’ll examine the most frequently reported problems with…