2012 Mercedes-Benz SL-Class Technical Data
| SL550 | SL63 AMG | ||
| Vehicle type | Two-seat coupe / roadster with power-operated retractable hard top | Two-seat coupe / roadster with power-operated retractable hard top | |
| Chassis | Steel unibody | Steel unibody | |
| Engine | 90-degree V8 | 90-degree V8 | |
| Valve arrangement | 4 valves per cylinder | 4 valves per cylinder | |
| Valvetrain | Double overhead camshaft | Double overhead camshaft | |
| Displacement (cc) | 333.2 / 5,461 | 378.7 / 6,208 | |
| Bore (in./mm) | 3.82 / 98.0 | 4.02 / 102.2 | |
| Stroke (in./mm) | 3.31 / 90.5 | 3.72 / 94.6 | |
| Compression ratio | 10.7:1 | 11.3:1 | |
| Horsepower @ rpm | 382 @ 6000 | 518 @ 6,800 | |
| Torque (lb-ft.) @ rpm | 391 @ 2800 - 4800 | 465 @ 5,200 | |
| Intake system | Sequential fuel injection, electronic throttle, continuously variable intake and exhaust valve timing | Two-stage resonance intake manifold | |
| Max. engine speed (rpm) | 6,500 | 7,200 | |
| Transmission | Seven-speed automatic | Seven-speed multi-clutch transmission with AMG SPEEDSHIFT PLUS | |
| Shift controls | Touch Shift manual shift control | Touch Shift manual shift control | |
| Gear ratios | Automatic | Automatic | |
| 1 | 4.38:1 | 4.38:1 | |
| 2 | 2.86:1 | 2.86:1 | |
| 3 | 1.92:1 | 1.92:1 | |
| 4 | 1.37:1 | 1.37:1 | |
| 5 | 1.00:1 | 1.00:1 | |
| 6 | 0.82:1 | 0.82:1 | |
| 7 | 0.73:1 | 0.73:1 | |
| R | - 3.42:1 | - 3.42:1 | |
| R2 "comfort mode" | - 2.23:1 | - 2.23:1 | |
| Final drive | 2.65:1 | 3.06:1 | |
| Stability control | ESP stability control | ESP stability control | |
| Suspension | Four-wheel independent with ABC active suspension (automatic four wheel level control, driver-selectable ride height and automatic lowering at higher speed) |
Four-wheel independent with ABC active suspension (automatic four wheel level control, driver-selectable ride height and automatic lowering at higher speed) |
|
| front | Independent four - link double control arm, gas shocks, coil springs in series with hydraulic cylinders | Independent four - link double control arm, gas shocks, coil springs in series with hydraulic cylinders | |
| rear | Independent five-link, gas shocks, coil springs in series with hydraulic cylinders | Independent five-link, gas shocks, coil springs in series with hydraulic cylinders | |
| Steering | Speed-sensitive rack-and-pinion, hydraulic power assist | Speed-sensitive rack-and-pinion, hydraulic power assist | |
| Turning radius (ft.) | 36.2 | 36.2 | |
| Wheels (in.) | front | 8.5 x 18 | 8.5 x 19 |
| rear | 9.5 x 18 | 9.5 x 19 | |
| Tires | front | 255/40 R18 | 255/35 R 19 |
| rear | 285/35 R18 | 285/30 R 19 | |
| Brakes | Four-wheel disc, power assisted, electro- hydraulic; Four-channel ABS anti-lock, Brake Assist, electronic brake proportioning | Four-wheel disc, power assisted, electro- hydraulic; Four-channel ABS anti-lock, Brake Assist, electronic brake proportioning | |
| Disc diameter (in./mm) | front | 13.8 / 350.5; ventilated, perforated | 14.2 / 360.7; ventilated, perforated |
| rear | 12.6 / 320; solid | 13.0 / 330; ventilated, perforated | |
| Disc thickness (in./mm) | front | 1.26 / 32 | 1.42 / 36 |
| rear | 0.94 / 24 | 1.00 / 26 | |
| Exterior dimensions (in/mm) | |||
| Wheelbase | 100.8 | 100.8 | |
| Length | 180.4 | 180.8 | |
| Width | 81.4 | 81.4 | |
| Height | 51.1 | 51.1 | |
| Ground clearance (in.) | -- | -- | |
| Track | front | 61.4 | 61.4 |
| rear | 60.5 | 60.5 | |
| Interior dimensions (in.) | |||
| Head room | front | 37.7 | 37.7 |
| 2nd / 3rd row | -- | -- | |
| Leg room | front | 42.9 | 42.9 |
| 2nd / 3rd row | -- | -- | |
| Shoulder room | front | 54 | 54 |
| 2nd | -- | -- | |
| Cargo Length | Back row up | -- | -- |
| Back | -- | -- | |
| Capacities | |||
| Cabin volume (cu. ft.) | 50.5 | 50.5 | |
| Cargo volume | seats up | 10.2 (top up) / 7.2 (top down) | 10.2 (top up) / 7.2 (top down) |
| Back row down | |||
| Curb weight (lbs.) | 4,222 | 4,398 | |
| Towing (lbs.) | -- | -- | |
| Max. total payload | -- | -- | |
| Fuel tank/reserve (gallons) | 21.1 / 2.6 | 21.1 / 2.6 | |
| AdBlue tank (gallons) | N/A | N/A | |
| Performance | |||
| 0-60 (seconds) | 5.3 | 4.5 | |
| Top speed (mph) | 155 | 155 | |
| Fuel mileage, city/hwy (EPA estimates) |
14 City / 22 Highway / 17 Overall | 12 City / 19 Highway / 14 Overall | |
