2012 Mercedes-Benz S-Class S550
The 2012 Mercedes-Benz S-Class S550 is a 429-hp 4.7-liter twin-turbocharged V8 with a 7-speed automatic and rear-wheel drive. It is rated at 19 mpg combined.
| Spec | Value |
|---|---|
| Engine | |
| Engine Type | Twin-turbocharged V8 |
| Displacement | 4.7 L |
| Boost Pressure | 12.9 psi |
| Horsepower | 429 hp @ 5,250 rpm |
| Torque | 516 lb-ft @ 1800-3500 rpm |
| Redline | 6,500 rpm |
| Valvetrain | DOHC with variable valve timing, 4 valves per cylinder |
| Bore and Stroke | 92.9 x 86.0 |
| Compression Ratio | 10.5:1 |
| Injection Type | Twin-turbocharged direct injection with piezo injectors |
| Drivetrain | |
| Drive Type | RWD |
| Transmission | |
| Transmission | 7-speed automatic |
| 1st Gear | 4.38 (45 mph **) |
| 2nd Gear | 2.86 (69 mph **) |
| 3rd Gear | 1.92 (103 mph **) |
| 4th Gear | 1.37 (144 mph **) |
| 5th Gear | 1 (197 mph **) |
| 6th Gear | 0.82 (241 mph **) |
| 7th Gear | 0.73 (270 mph **) |
| Reverse | 3.42 |
| Final Drive | 2.65 |
| Fuel Economy | |
| City | 15 MPG |
| Highway | 25 MPG |
| Combined | 19 MPG |
| Suspension | |
| Front Suspension | Four-link, anti-lift, gas-pressurized shock absorbers, stabilizer bar; AIRMATIC with adjustable ride height |
| Rear Suspension | Multilink independent, anti-squat and anti-dive; AIRMATIC with adjustable ride height |
| Front Stabilizer Bar | Yes |
| Brakes | |
| Front Brake Disc | 13.2 in. diameter, 1.3 in. thickness (ventilated) |
| Rear Brake Disc | 11.8 in. diameter, 0.45 in. thickness (ventilated) |
| Tires & Wheels | |
| Wheels Front | 8.5J × 18 in. |
| Wheels Rear | 8.5J × 18 in. |
| Tires Front | 255/45 R18 |
| Tires Rear | 255/45 R18 |
| Dimensions & Weight | |
| Length | 206.5 in |
| Width | 73.7 in |
| Height | 58 in |
| Wheelbase | 124.6 in |
| Front Track | 62.9 in |
| Rear Track | 63.2 in |
| Ground Clearance | 5.75 in |
| Cargo Volume | 16.4 ft³ |
| Curb Weight | 4,740 lbs |
| Interior | |
| Headroom Front | 37.8 in |
| Headroom Rear | 38.5 in |
| Legroom Front | 41.9 in |
| Legroom Rear | 42.3 in |
| Shoulder Room Front | 59.1 in |
| Shoulder Room Rear | 58.7 in |
** Theoretical max speed per gear at redline