Mercedes CLS 2021 CLS 400 d (C257)

Mercedes CLS 2021 2.9 diesel description

Coupe Mercedes CLS 2021 CLS 400 d has been produced from 2021 to 2023. 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 fuel consumption is 6.5 litres per 100km in combined city/highway mode (15.4 km/l), fuel consumption in city - 8.6 l/100km, highway fuel economy - 5.3 l/100km. Fuel tank capacity is 50 litres or 13.21 gallons, which gives a mileage up to 760 kilometers without refueling in urban cycle and even up to 940 kilometers on highway.

Mercedes CLS 2021

Mercedes CLS 2021 CLS 400 d technical data

Model: Mercedes CLS CLS 400 d
Body style: Coupe
Production period: 2021. January ... 2023. December 
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): 6.5 (combined) 8.6 (urban) 5.3 (highway)
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
Gross weight: 2545 kg Net weight: 1860 kg Load capacity: 685 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
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 9 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.

All Mercedes CLS coupe [2021 - 2023] modifications

Modification Engine Power Consumption Drive type
Mercedes CLS 2021 2.0 CLS 220 d

Most fuel efficient diesel version

2.0 Diesel 194 HP 5.1 l/100km Rear wheel
Mercedes CLS 2021 2.0 CLS 300 d 4x4 2.0 Diesel
MHEV hybrid engine
265 HP 5.8 l/100km All wheel
Mercedes CLS 2021 2.9 CLS 400 d 4x4

Most powerfull diesel version (330 HP)

2.9 Diesel 330 HP 6.5 l/100km All wheel
Mercedes CLS 2021 3.0 CLS 450 4x4

Most fuel efficient petrol version

3.0 Petrol
MHEV hybrid engine
367 HP 8.5 l/100km All wheel
Mercedes CLS 2021 3.0 AMG CLS 53 4x4

Most dynamic version - 100 km/h in 4.5 seconds

3.0 Petrol
MHEV hybrid engine
435 HP 9.6 l/100km All wheel
Mercedes CLS 2021 reviews
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