This 10th generation E-Class debuted for the 2017 model year at which point I tested the entry-level E300 and was most impressed with its semi-autonomous driving capabilities, beautiful styling and modern luxury. Four years later and the E-Class ratchets up the cabin tech, tweaks the exterior styling and introduces a new electrified powertrain to this step-up E450 model. 4Matic all-wheel drive is standard and of course, there are all sorts …