M256
Inline-6- 256.9303.0 L · 2,999 cc
435 PS
320 kW · 429 hp at 6,100 rpm
770 N·m
568 lb·ft at 1,800 rpm
Mercedes-Benz CLS-Class 4-Door Coupé (C257) · CLS
C257
Third-generation four-door coupé elegance.
- Production
- 2019
- Body
- Coupé
- Chassis
- C257
The four-door coupé grew up — the second-generation CLS on the C257 chassis traded the original's shock-value styling for a more refined, more technologically advanced interpretation of the format Mercedes-Benz had invented.
Launched in 2018, the C257 CLS shared the MRA platform with the E-Class and adopted a cleaner, more sculptural body with frameless side windows and a fastback profile moderated for better rear accommodation. Turbocharged inline-six and V8 engines — including the CLS 53 AMG with EQ Boost mild-hybrid assistance — powered a car positioned as a design-led alternative to the conventional E-Class saloon. The widescreen MBUX cockpit and advanced driver-assistance systems reflected the CLS's role as a technology showcase.
Built from 2018 to 2023, the C257 CLS represented the second and final iteration of Mercedes-Benz's original four-door coupé concept — a more mature car that proved the format could evolve beyond its novelty origins.
Every model.
6 model designations for 2019 — engines, chassis codes and production figures for the C257.
| Model | Model years | Chassis | Engine | Transmission | Total |
|---|---|---|---|---|---|
| CLS 220 d | 2019– | 257.314 | 654.920 | — | |
| CLS 300 d | 2019– | 257.318 | 654.920 | — | |
| CLS 350 d 4MATIC | 2019– | 257.321 | 656.929 | — | |
| CLS 400 d 4MATIC | 2019– | 257.323 | 656.929 | — | |
| CLS 350 | 2019– | 257.350 | 264.920 | — | |
| CLS 450 4MATIC | 2019– | 257.359 | 264.930 | — |
Engines.
The M256 as fitted to the C257.