Mercedes Classe B W246 (2011 – 2018)

Reliability score : 8.2/10

The Mercedes-Benz B-Class W246 represents the second generation of the brand's premium compact MPV. Abandoning the expensive and heavy 'sandwich floor' of its predecessor (W245), the W246 shares the MFA (Modular Front Architecture) platform with the A-Class (W176). This shift resulted in a lower center of gravity, vastly improved driving dynamics, and a more conventional, yet highly practical, interior layout. A mid-cycle facelift (LCI) was introduced in late 2014, bringing updated LED lighting, an upgraded infotainment screen, and revised trim levels. While this report focuses primarily on the petrol variants (which are highly recommended for this model), the W246 was also offered with robust diesels, a rare natural gas version, and a fully electric variant developed in partnership with T

✅ Strengths

Excellent interior space and practicality within a compact footprint
High-quality interior materials, especially on post-2014 facelift models
M270 petrol engines are refined, efficient, and generally very reliable
High seating position offers great visibility and easy ingress/egress
Strong safety record with advanced driver assistance systems for its era

⚠️ Weaknesses

Firm ride quality, particularly on models equipped with AMG Line suspension and 18-inch wheels
7G-DCT dual-clutch transmission can be jerky at low speeds or in stop-and-go traffic
Maintenance and repair costs are typical of a premium brand (expensive)
Wind noise becomes noticeable at highway speeds due to the upright MPV shape
B250e electric version has poor range and potentially catastrophic drive unit issues

🎯 Verdict

The Mercedes-Benz B-Class W246 is an excellent choice for buyers seeking a premium, practical, and safe family vehicle without the bulk of an SUV. For the vast majority of buyers, the petrol variants (B180 or B200) are the absolute best choice. The M270 engine is refined, efficient, and avoids the complex emissions systems (DPF, EGR) that plague modern diesels in urban environments. While early petrol models had minor timing chain/thermostat issues, these are well-documented and easily checked. Avoid the B250e electric version unless it has a replaced drive unit and a solid warranty. When buying, prioritize a post-2014 facelift model with a fully documented service history, paying special attention to the 7G-DCT transmission fluid changes.