Comparison Mercedes-Benz B-class (W246) B 250 (211 Hp) DCT & Mercedes-Benz 300 SLR Coupe (W196S) 3.0 (310 Hp)
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| Brand: | Mercedes-Benz | Mercedes-Benz |
| Model: | B-class | 300 SLR |
| Generation: | B-class (W246) | 300 SLR Coupe (W196S) |
| Engine / modification: | B 250 (211 Hp) DCT | 3.0 (310 Hp) |
| Production start: | 2012 year | 1955 year |
| Production end: | 2014 year | 1955 year |
| Coupe type: | Hatchback | Coupe |
| Num. of Doors: | 5 | 2 |
| Num. of seats: | 5 | 2 |
| Fuel consumption / economy - urban: | 8.6-8.5 l/100 km | |
| Fuel consumption / economy - extra urban: | 4.7-4.6 l/100 km | |
| Fuel consumption / economy - combined: | 6.1 l/100 km | 30 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Fuel tank volume: | 50 l | 155 l |
| Emission standard: | Euro 6 | |
| CO2 emissions: | 143-141 g/km | |
| Power: | 211 hp | 310 hp |
| Max power in: | 5500 rpm. | 7400 rpm. |
| Maximum speed: | 240 km/h | 284 km/h |
| Acceleration from 0 to 100 km/h: | 6.8 sec | |
| Torque: | 350 Nm @ 1200-4000 rpm. | 311 Nm @ 5950 rpm. |
| Model Engine: | M 270.920 | M 196 S |
| Engine position: | Front, transverse | Front, longitudinal |
| Engine displacement: | 1991 cm3 | 2982 cm3 |
| Engine oil capacity: | 5.8 l | |
| Coolant: | 7 l | |
| Fuel System: | Direct injection | Direct injection |
| Maximum engine speed: | 7800 rpm. | |
| Aspiration / Turbine: | Turbocharging | |
| Position of cylinders: | Inline | Inline |
| Valvetrain: | DOHC | |
| Number of cylinders: | 4 | 8 |
| Number of valves per cylinder: | 4 | 2 |
| Compression ratio: | 9.8 | 9 |
| Piston Stroke: | 78 mm | |
| Cylinder Bore: | 78 mm | |
| Wheel Drive: | Front wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 7G-DCT | |
| Number of Gears (manual transmission): | 5 | |
| Length: | 4359 mm | 4350 mm |
| Width: | 1786 mm | 1750 mm |
| Height: | 1557 mm | 1210 mm |
| Wheelbase: | 2699 mm | 2370 mm |
| Front track: | 1552 mm | 1330 mm |
| Rear (Back) track: | 1549 mm | 1380 mm |
| Minimum volume of Luggage (trunk): | 488 l | |
| Maximum amount of Luggage (trunk): | 1547 l | |
| Front suspension: | McPherson | Double wishbone |
| Rear suspension: | Trailing | Torsion |
| Max weight: | 2000 kg | |
| Front brakes: | Ventilated discs | |
| Rear brakes: | Disc | |
| Kerb Weight: | 1475 kg | 1117 kg |
| ABS: | yes | |
| Steering type: | Steering rack and pinion | Worm-reduction unit |
| Power steering: | Electric Steering | |
| Minimum turning circle (turning diameter): | 11 m | |
| Tire size: | 225/45 R17 | Front wheel tires: 175/95 R16 |
| Wheel rims size: | R17 | Front wheel rims: R16 |