The third-generation Mercedes-Benz CLS (C257) marks a return to stylistic roots with a refined design (Sensual Purity language) and the abandonment of the Shooting Brake variant. Based on the E-Class W213's MRA platform, it notably signifies the grand return of inline 6-cylinder engines (petrol and diesel) to Mercedes. This generation stands out for the massive integration of 48V mild-hybridization (EQ Boost) on its petrol powertrains, offering a high level of driving pleasure. Although production officially ceased in August 2023 to rationalize the range (in favor of the CLE and EQE), it remains a prestigious and highly accomplished grand touring choice. Mechanical reliability is generally excellent, although the onboard electronic systems (MBUX, 48V network) require particular attention.
The Mercedes CLS C257 is a formidable touring machine, which particularly shines when powered by the inline 6-cylinder engines (CLS 450, 53 AMG or 400d). If you are targeting a petrol engine, the M256 block (CLS 450) is the top choice: it offers a level of refinement worthy of the badge while remaining reasonable in consumption thanks to mild hybridization. Purchase is highly recommended, provided you opt for a model with a clear service history within the Mercedes network, and whose recall campaigns (especially concerning the 48V network) have been scrupulously carried out. Avoid the entry-level 4-cylinder models (CLS 350) which lack the prestige for a vehicle of this standing.