Comparison Mercedes-Benz SLK (R172) SLK 250 CDI (204 Hp) & Mercedes-Benz S-class SEL (V126, facelift 1985) 560 SEL V8 CAT (242 Hp) Automatic & Mercedes-Benz S-class (W221, facelift 2009) S 350 (272 Hp) G-TRONIC
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| Brand: | Mercedes-Benz | Mercedes-Benz | Mercedes-Benz |
| Model: | SLK | S-class | S-class |
| Generation: | SLK (R172) | S-class SEL (V126, facelift 1985) | S-class (W221, facelift 2009) |
| Engine / modification: | SLK 250 CDI (204 Hp) | 560 SEL V8 CAT (242 Hp) Automatic | S 350 (272 Hp) G-TRONIC |
| Production start: | 2012 year | 1985 year | 2009 year |
| Production end: | 2015 year | 1987 year | 2011 year |
| Coupe type: | Cabriolet | Sedan | Sedan |
| Num. of Doors: | 2 | 4 | 4 |
| Num. of seats: | 2 | 5 | 5 |
| Fuel consumption / economy - urban: | 6.4-6.2 l/100 km | 18 l/100 km | 14.6-14.8 l/100 km |
| Fuel consumption / economy - extra urban: | 4.1-4.0 l/100 km | 11.4 l/100 km | 7.4-7.7 l/100 km |
| Fuel consumption / economy - combined: | 5.0-4.8 l/100 km | 10-10.2 l/100 km | |
| Fuel Type: | Diesel | Petrol (Gasoline) | Petrol (Gasoline) |
| Fuel tank volume: | 60 l | 90 l | 90 l |
| Emission standard: | Euro 5 | ||
| CO2 emissions: | 129-124 g/km | 234-237 g/km | |
| Power: | 204 hp | 242 hp | 272 hp |
| Max power in: | 3800 rpm. | 4800 rpm. | 6000 rpm. |
| Maximum speed: | 244 km/h | 228 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 6.5 sec | 7.6 sec | 7.3 sec |
| Torque: | 500 Nm @ 1600-1800 rpm. | 390 Nm @ 3500 rpm. | 350 Nm @ 2400-5000 rpm. |
| Model Engine: | M 117 E 56 / 117.968 | M 272.965 | |
| Engine position: | Front, longitudinal | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2143 cm3 | 5547 cm3 | 3498 cm3 |
| Engine oil capacity: | 8 l | 8.0 l | |
| Coolant: | 13.5 l | ||
| Fuel System: | Diesel Commonrail | Multi-point injection | |
| Aspiration / Turbine: | Turbo / Intercooler (Turbocharging / Intercooler) | ||
| Position of cylinders: | Inline | V engine | |
| Valvetrain: | SOHC | ||
| Number of cylinders: | 4 | 8 | 6 |
| Number of valves per cylinder: | 2 | ||
| Compression ratio: | 16.2 | 9 | 10.7 |
| Piston Stroke: | 94.8 mm | ||
| Cylinder Bore: | 96.5 mm | ||
| Wheel Drive: | Rear wheel drive | ||
| Number of Gears (automatic transmission): | 4 | 7G-TRONIC | |
| Number of Gears (manual transmission): | 6 | ||
| Length: | 4134 mm | 5160 mm | 5096 mm |
| Width: | 1810 mm | 1820 mm | 1871 mm |
| Width including mirrors: | 2120 mm | ||
| Height: | 1301 mm | 1446 mm | 1479 mm |
| Wheelbase: | 2430 mm | 3070 mm | 3035 mm |
| Front track: | 1559 mm | 1555 mm | 1600 mm |
| Rear (Back) track: | 1565 mm | 1527 mm | 1606 mm |
| Front overhang: | 888 mm | ||
| Rear overhang: | 1173 mm | ||
| Minimum volume of Luggage (trunk): | 225 l | 560 l | |
| Maximum amount of Luggage (trunk): | 335 l | ||
| Front suspension: | Independent multi-link | Double wishbone | |
| Rear suspension: | Multi-link independent | Threaded twist beam | |
| Max weight: | 1885 kg | 2270 kg | 2490 kg |
| Front brakes: | Ventilated discs | Ventilated discs | Disc |
| Rear brakes: | Disc | Disc | Disc |
| Kerb Weight: | 1570 kg | 1810 kg | 1820 kg |
| ABS: | yes | yes | |
| Steering type: | Steering rack and pinion | Cone worm with recirculation balls | Steering rack and pinion |
| Power steering: | Electric Steering | Hydraulic Steering | |
| Minimum turning circle (turning diameter): | 10.52 m | 11.8 m | |
| Tire size: | 205/55 R16 | Front wheel tires: 215/65 R15 | 235/55 R17 |
| Wheel rims size: | R16 | Front wheel rims: 7J x 15 | R17 |