2012 Mercedes-Benz SL-Class SL550
The 2012 Mercedes-Benz SL-Class SL550 is a 382-hp 5.5-liter V8 with a seven-speed automatic and rear-wheel drive. It is rated at 17 mpg combined.
It makes 382 horsepower at 6,000 rpm and 391 lb-ft of torque at 2800-4800 rpm, spinning to a 6,500 rpm redline. EPA fuel-economy estimates are 14 mpg city and 22 mpg highway (17 mpg combined).
The SL-Class measures 180.4 inches long on a 100.8-inch wheelbase and has a curb weight of 4,222 lb.
| Spec | Value |
|---|---|
| Engine | |
| Engine Type | Naturally Aspirated V8 |
| Displacement | 5.461 L |
| Horsepower | 382 hp @ 6,000 rpm |
| Torque | 391 lb-ft @ 2800-4800 rpm |
| Redline | 6,500 rpm |
| Valvetrain | DOHC, 4 valves/cylinder |
| Bore and Stroke | 98.0 x 90.5 |
| Compression Ratio | 10.7:1 |
| Injection Type | Sequential fuel injection with variable valve timing |
| Drivetrain | |
| Drive Type | RWD |
| Transmission | |
| Transmission | Seven-speed automatic |
| 1st Gear | 4.38 (43 mph **) |
| 2nd Gear | 2.86 (66 mph **) |
| 3rd Gear | 1.92 (98 mph **) |
| 4th Gear | 1.37 (138 mph **) |
| 5th Gear | 1 (189 mph **) |
| 6th Gear | 0.82 (230 mph **) |
| 7th Gear | 0.73 (258 mph **) |
| Reverse | 3.42 |
| Final Drive | 2.65 |
| Fuel Economy | |
| City | 14 MPG |
| Highway | 22 MPG |
| Combined | 17 MPG |
| Recommended Fuel | Premium Gasoline |
| Suspension | |
| Front Suspension | Independent 4-link double control arm, gas shocks, coil springs in series with hydraulic cylinders (ABC) |
| Rear Suspension | Independent 5-link, gas shocks, coil springs in series with hydraulic cylinders (ABC) |
| Turning Diameter | 36.2 ft |
| Brakes | |
| Front Brake Disc | 13.8 in ventilated/perforated |
| Rear Brake Disc | 12.6 in solid |
| Tires & Wheels | |
| Wheels Front | 8.5 x 18 in |
| Wheels Rear | 9.5 x 18 in |
| Tires Front | 255/40 R18 |
| Tires Rear | 285/35 R18 |
| Dimensions & Weight | |
| Length | 180.4 in |
| Width | 81.4 in |
| Height | 51.1 in |
| Wheelbase | 100.8 in |
| Front Track | 61.4 in |
| Rear Track | 60.5 in |
| Cargo Volume | 10.2 ft³ |
| Curb Weight | 4,222 lbs |
| Interior | |
| Headroom Front | 37.7 in |
| Legroom Front | 42.9 in |
| Shoulder Room Front | 54 in |
** Theoretical max speed per gear at redline