Mercedes-Benz CLS-Class 4-Door Coupé (C257) · CLS

C257

Third-generation four-door coupé elegance.

Production: 2018–2023
Body: Coupé
Chassis: C257

Mercedes-Benz CLS-Class 4-Door Coupé (C257) (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.

C257 interior — Cabin details of the C257, as preserved in period photography.

Every model.

6 model designations across 2019–2023 — engines, chassis codes and production figures for the C257.

Model	Lata modelowe	Zbudowano	Podwozie	Silnik	Razem
CLS 220 d	2019–	06.2018–	257.314	654.920	—
CLS 300 d	2019–	04.2018–	257.318	654.920	—
CLS 350 d	2019–	04.2018–	257.320	656.929	—
CLS 350 d 4MATIC	2019–	12.2017–	257.321	656.929	—
CLS 400 d 4MATIC	2019–	12.2017–	257.323	656.929	—
CLS 350	2019–	09.2018–	257.350	264.920	—
CLS 450 4MATIC	2019–	03.2018–	257.359	256.930	—
CLS 53 4MATIC+	2019–	05.2018–	257.361	256.930	—

Studio profile of the C257 — the proportions that defined this chassis.

Year by year.

The inline-six launch, MBUX update, sharpened 2021 design and end of the CLS line.

2018
- Third-generation CLS reached customers with five seats for the first time, widescreen cockpit, 64-color ambient lighting and E-Class-derived driver assistance.
- CLS 450 and AMG CLS 53 introduced 48-volt M256 inline-six power; the 53 replaced the previous V8 CLS 63 as the sole AMG derivative.
2020
- Model-year update added MBUX, revised assistance systems with hands-off steering-wheel detection, ENERGIZING COACH and new engine choices.
2021
- Facelift sharpened the grille and bumpers, made AMG Line exterior standard in more markets and added a capacitive-generation steering wheel, new trims, wheels and MANUFAKTUR colors.
- CLS 300 d 4MATIC gained the 48-volt OM654M diesel with 195 kW (265 PS) plus 15 kW boost.
- AMG CLS 53 Limited Edition capped at 300 cars combined matte paint, side stripes, both Night Packages and the AMG DYNAMIC PLUS Package.
2023
- C257 production ended in August without a direct successor, closing the Mercedes-Benz CLS line after three generations.

C257 rear three-quarter view — Rear three-quarter view of the C257.

Engines.

Four- and six-cylinder diesels and petrols — the OM654, OM656, M264 and M256 — as fitted to the C257.

OM654

Inline-4 diesel

654.920 CLS 220 d1.9 L · 1,950 cc
194 PS
143 kW · 191 KM przy 3,800 obr./min
400 N·m
295 lb·ft przy 1,600 obr./min
654.920 CLS 300 d1.9 L · 1,950 cc
245 PS
180 kW · 242 KM przy 4,200 obr./min
500 N·m
369 lb·ft przy 1,600 obr./min

OM656

Inline-6 diesel

656.929 CLS 350 d2.9 L · 2,925 cc
286 PS
210 kW · 282 KM przy 4,600 obr./min
600 N·m
443 lb·ft przy 1,200 obr./min
656.929 CLS 400 d2.9 L · 2,925 cc
340 PS
250 kW · 335 KM przy 4,400 obr./min
700 N·m
516 lb·ft przy 1,200 obr./min

M264

Inline-4

264.920 2.0 L · 1,991 cc
299 PS
220 kW · 295 KM przy 5,800 obr./min
400 N·m
295 lb·ft przy 3,000 obr./min

M256

Inline-6

256.930 3.0 L · 2,999 cc
367 PS
270 kW · 362 KM przy 5,500 obr./min
500 N·m
369 lb·ft przy 1,600 obr./min