Audi A2

I drove the Mercedes-Benz B-class last week—here’s some background: Mercedes-Benz is launching the third generation of its compacts—and this one marks a full departure from the previous A- and B-classes’ unique architecture. Previously, there was a sandwich-style, two-level floor, and the entry-level cars sported engines with a triangular cross section. The dual floor was designed to carry batteries, but alas, the expected EV breakthrough never materialized.