| General | |
| Body type | Coupe |
| Brand | Mercedes-Benz |
| Doors | 4 |
| End of production | 2021 |
| Generation | CLS coupe (C257) |
| Model | CLS |
| Modification (Engine) | CLS 350 (299 Hp) EQ Boost G-TRONIC |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle, power-assist hybrid, battery-assisted hybrid vehicles, BAHV) |
| Seats | 5 |
| Start of production | 2018 |
| Performance | |
| Acceleration 0 - 100 km/h | 6 sec |
| Acceleration 0 - 60 mph | 5.7 sec |
| Acceleration 0 - 62 mph | 6 sec |
| CO2 emissions | 162 g/km |
| CO2 emissions (WLTP) | 172-195 g/km |
| Emission standard | Euro 6 |
| Fuel Type | Petrol (Gasoline) |
| Fuel consumption (economy) - combined | 7.9 l/100 km |
| Fuel consumption (economy) - extra urban | 5.6 l/100 km |
| Fuel consumption (economy) - urban | 9.3 l/100 km |
| Maximum speed | 249 km/h |
| Electric | |
| Electric motor power number 1 | 14 Hp |
| Electric motor Torque number 1 | 150 Nm |
| Internal Engine | |
| Compression ratio | 10 |
| Coolant | 9 l |
| Engine aspiration | Turbocharger |
| Engine displacement | 1991 cm |
| Engine location | Front, Longitudinal |
| Engine oil capacity | 6.6 l |
| Fuel System | Direct injection |
| Model Engine | M 264.920 |
| Number of cylinders | 4 |
| Number of valves per cylinder | 4 |
| Position of cylinders | Inline |
| Power | 299 Hp @ 5800-6100 rpm. |
| Power per litre | 150.2 Hp/l |
| Torque | 400 Nm @ 3000-4000 rpm. |
| Dimensions | |
| Approach angle | 11.9° |
| Departure angle | 11.5° |
| Front overhang | 888 mm |
| Front track | 1619 mm |
| Height | 1436 mm |
| Length | 4996 mm |
| Minimum turning circle (turning diameter) | 11.60 m |
| Ramp angle | 8.5° |
| Rear (Back) track | 1634 mm |
| Rear overhang | 1169 mm |
| Ride height | 94 mm |
| Wheelbase | 2939 mm |
| Width | 1896 mm |
| Drivetrain | |
| Drive wheel | Rear wheel drive |
| Front brakes | Ventilated discs |
| Number of Gears (automatic transmission) | 9 G-TRONIC PLUS |
| Power steering | Electric Steering |
| Rear brakes | Ventilated discs |
| Steering type | Steering rack and pinion |
| Tires size | 245/40 R19; 275/35 R19 |
| Wheel rims size | R19 |
| Space | |
| Fuel tank capacity | 80 l |
| Kerb Weight | 1775 kg |
| Max load | 645 kg |
| Max. weight | 2420 kg |
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