Comparison Mercedes-Benz R-class (W251) R 300 CDI BlueEFFICIENCY (190 Hp) & Mercedes-Benz CLS Shooting Brake (X218 facelift 2014) CLS 350 d (258 Hp) G-TRONIC & BMW 6 Series Gran Coupe (F06) 640i (320 Hp) xDrive Steptronic
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| Brand: | Mercedes-Benz | Mercedes-Benz | BMW |
| Model: | R-class | CLS | 6 Series |
| Generation: | R-class (W251) | CLS Shooting Brake (X218 facelift 2014) | 6 Series Gran Coupe (F06) |
| Engine / modification: | R 300 CDI BlueEFFICIENCY (190 Hp) | CLS 350 d (258 Hp) G-TRONIC | 640i (320 Hp) xDrive Steptronic |
| Production start: | 2009 year | 2015 year | 2013 year |
| Production end: | 2012 year | 2018 year | 2015 year |
| Coupe type: | Combi | Combi | Coupe |
| Num. of Doors: | 5 | 5 | 4 |
| Num. of seats: | 5 | 4-5 | 4 |
| Fuel consumption / economy - urban: | 9.6-9.9 l/100 km | 6.5 l/100 km | 11.1-11.3 l/100 km |
| Fuel consumption / economy - extra urban: | 6.4-6.7 l/100 km | 5.0-5.1 l/100 km | 6.4-6.6 l/100 km |
| Fuel consumption / economy - combined: | 7.6-7.8 l/100 km | 5.6-5.7 l/100 km | 8.1-8.3 l/100 km |
| Fuel Type: | Diesel | Diesel | Petrol (Gasoline) |
| Drag coefficient: | 0.29 | 0.32 | |
| Fuel tank volume: | 80 l | 59 l | 70 l |
| Emission standard: | EURO V | Euro 6 | Euro 5 |
| CO2 emissions: | 145-149 g/km | 189-193 g/km | |
| Power: | 190 hp | 258 hp | 320 hp |
| Max power in: | 3800 rpm. | 3400 rpm. | 5800-6000 rpm. |
| Maximum speed: | 215 km/h | 245 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 9.5 sec | 6.6 sec | 5.3 sec |
| Torque: | 440 Nm/1400-2800 rpm. | 620 Nm @ 1600-2400 rpm. | 450 Nm @ 1300-4500 rpm. |
| Model Engine: | OM 642.852, OM 642.858 | N55B30 | |
| Engine position: | Front, longitudinal | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2987 cm3 | 2987 cm3 | 2979 cm3 |
| Engine oil capacity: | 8 l | 6.5 l | |
| Coolant: | 10.8 l | 10.2 l | |
| Fuel System: | Diesel Commonrail | Diesel Commonrail | Direct injection |
| Aspiration / Turbine: | Turbo / Intercooler (Turbocharging / Intercooler) | Turbo / Intercooler (Turbocharging / Intercooler) | Twin-power turbo |
| Position of cylinders: | V engine | V engine | Inline |
| Valvetrain: | DOHC | ||
| Number of cylinders: | 6 | 6 | 6 |
| Number of valves per cylinder: | 4 | 4 | |
| Compression ratio: | 15.5 | 15.5 | 10.2 |
| Piston Stroke: | 92 mm | 89.6 mm | |
| Cylinder Bore: | 83 mm | 84 mm | |
| Wheel Drive: | Rear wheel drive | Rear wheel drive | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 7 | 9G-TRONIC | 8 Steptronic |
| Length: | 4922 mm | 4953 mm | 5007 mm |
| Width: | 1922 mm | 1881 mm | 1894 mm |
| Width including mirrors: | 2075 mm | ||
| Height: | 1674 mm | 1419 mm | 1392 mm |
| Wheelbase: | 2980 mm | 2874 mm | 2968 mm |
| Front track: | 1661 mm | 1596 mm | 1600 mm |
| Rear (Back) track: | 1651 mm | 1629 mm | 1665 mm |
| Ride height(clearance): | 126 mm | ||
| Front overhang: | 898 mm | ||
| Rear overhang: | 1181 mm | ||
| Minimum volume of Luggage (trunk): | 550 l | 590 l | 460 l |
| Maximum amount of Luggage (trunk): | 1950 l | 1550 l | 1265 l |
| Front suspension: | Helical spring | McPherson | Double wishbone |
| Rear suspension: | Helical spring | Multi-link independent | Multi-link independent |
| Max weight: | 2840 kg | 2460 kg | 2430 kg |
| Front brakes: | Ventilated discs | Ventilated discs | Ventilated discs |
| Rear brakes: | Disc | Disc | Ventilated discs |
| Kerb Weight: | 2185 kg | 1860 kg | 1825 kg |
| ABS: | yes | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Electric Steering | Electric Steering |
| Max. roof load: | 100 kg | 75 kg | |
| Minimum turning circle (turning diameter): | 11.8 m | 11.18 m | 11.95 m |
| Permitted trailer load with brakes (12%): | 2100 kg | ||
| Permitted trailer load without brakes: | 750 kg | ||
| Tire size: | 235/65 R 17 | 245/45 R17 | 225/55 R17; 245/45 R18; 245/40 R19; 275/35 R19; 245/35 R20; 275/30 R20 |
| Wheel rims size: | R17 | R17 | 8J x 17; 8J x 18; 8.5J x 19; 9J x 19; 8.5J x 20; 9J x 20 |