Mercedes CLS 2021 CLS 400 d (C257)
Mercedes CLS 2021 2.9 diesel description
Coupe Mercedes CLS 2021 CLS 400 d is being produced from January, 2021. It has six-cylinder diesel engine with displacement of 2.9 litres, which produces power of 330 horsepower on 3600 rpm and torque 700 Nm (Newton metres) on 1200 revolutions per minute.
This 6-cylinder 24-valve engine camshaft is driven by chain (What is an engine chain and belt? ). Engine has Common Rail fuel system and BorgWarner R2S turbine. The engine meets the Euro 6 emissions standard. Engine lifespan (mileage before major repairs or overhaul) can last from 210 up to 360 thousand kilometres. Remember that engine life depends on regular maintenance and the quality of the materials used (oils, fuels, etc.).
More engine specs
This Mercedes CLS 2.9 engine oil type is 5W-30 and oil capacity is 8.5 litres.
Mercedes CLS 2021 CLS 400 d has all four wheel drive (AWD, 4x4) and automatic gearbox with 9 gears.
Mercedes CLS 2021 CLS 400 d accelerates to speed 100 kilometres per hour in 5.2 seconds. The maximum speed of this car is 250 km/h.

Mercedes CLS 2021 CLS 400 d technical data
Model: | Mercedes CLS CLS 400 d | ||
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Body style: | Coupe | ||
Production period: | 2021. January | ||
Engine: | 2927 cm3 Diesel, 6 cylinders | CO2 emissions: | no data |
Power: | 330 HP ON 3600 RPM | Torque: | 700 NM ON 1200 RPM |
Gearbox: | Automatic gearbox (9 gears) | Drive type: | All wheel drive (AWD, 4x4) |
Top speed: | 250 km/h | Acceleration 0-100 km/h: | 5.2 seconds |
Fuel consumption (l/100km): | no data | ||
Fuel tank capacity: | 50 litres (13.2 gallons) | ||
Car dimensions: | 5.01m (length) 1.90m (width) 1.42m (height) | ||
Turning diameter: | 11.9 meters | ||
Seats: | 5 seats | ||
Trunk capacity: | 520 litres | ||
Gross weight: | 2545 kg |
Mercedes CLS 2021 CLS 400 d engine OM656 400 D
Engine reliability:
Overall, this engine can last around 210,000 to 360,000 km if properly maintained, using the correct quality oil and fuel, and carrying out regular checks and maintenance.The engine has hydraulic valve tappets (lifters), which provide quieter operation and do not require periodic adjustment, but are more complex in design and can cause serious engine damage in the event of failure.
Engine displacement | 2927 cm3 |
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Number of cylinders | 6 |
Bore (cylinder diameter) | 82 mm |
Stroke length (piston move) | 92.4 mm |
Compression ratio | 15.5 : 1 |
Camshaft drive | Timing chain Chain motors are considered more reliable, chain replacement usually is required less often than a timing belt, but they are often louder and vibrate more. |
Fuel system | Common Rail Common rail fuel injection provides more engine power, is quieter, more environmentally friendly and offers better fuel economy, but is more expensive to maintain and repair. |
Mercedes CLS 2021 CLS 400 d oil type | 5W-30 |
Oil capacity | 8.5 litres (9 quarts) |
Power | 330 - 340 HP ON 3600 RPM |
Torque | 700 NM ON 1200 RPM |
Start of production (year) | 2017 |
Duration of production | 8 years |
Engine also used on | Mercedes E klase Mercedes GLC Mercedes GLE |
Generally, the use of an engine in several models and its long production run is an indication of the quality of the engine and the success of its design. |
Most often compared to
All Mercedes CLS coupe [2021 modifications
Modification | Engine | Power | Consumption | Drive type |
---|---|---|---|---|
Mercedes CLS 2021 2.0 CLS 220 d | 2.0 Diesel | 194 HP | - | Rear wheel |
Mercedes CLS 2021 2.0 CLS 300 d 4x4 | 2.0 Diesel | 265 HP | - | All wheel |
Mercedes CLS 2021 2.9 CLS 400 d 4x4
Most powerfull diesel version (330 HP) |
2.9 Diesel | 330 HP | - | All wheel |
Mercedes CLS 2021 3.0 CLS 450 4x4 | 3.0 Petrol | 367 HP | - | All wheel |
Mercedes CLS 2021 3.0 AMG CLS 53 4x4
Most dynamic version - 100 km/h in 4.5 seconds |
3.0 Petrol | 435 HP | - | All wheel |