The fourth-generation Mercedes-Benz A-Class (W177 for the compact hatchback, V177 for the sedan) marks a major technological breakthrough with the introduction of the MBUX infotainment system. Positioned as the benchmark premium compact against the Audi A3 and BMW 1 Series, it offers significantly improved finish quality compared to the previous generation (W176). A facelift occurred in late 2022, bringing mild hybridization (48V MHEV) to the petrol engines, the removal of the central touchpad, and a software update. Although global demand is shifting towards petrol and hybrid, the diesel offering (which is of particular interest here) remains one of the most accomplished on the market, with highly efficient engines (the reworked Renault-sourced OM608, then the excellent 100% Mercedes OM65
The Mercedes A-Class W177 is a highly desirable premium compact that has successfully corrected the comfort and finish flaws of its predecessor. If you are looking for a diesel, it is an excellent choice. The small 1.5L (180d until 2020) is an ultra-reliable workhorse, ideal for tight budgets. However, the 2.0L diesel (OM654q in 200d or 220d) is the true gem of this range: it offers superior driving pleasure, remarkable reliability, and negligible fuel consumption on the highway. Avoid 2.0L petrol models (220/250) from 2018-2019 without warranty due to cylinder head risks. Prioritize a post-2020 model to avoid the early electronic bugs of the MBUX system.