2018 Mercedes-Benz SL Roadster SL 550
The 2018 Mercedes-Benz SL Roadster SL 550 is a 449-hp 4.7-liter turbocharged V8 convertible with a 9g-tronic 9-speed automatic and rear-wheel drive. It starts at $112,300 MSRP and is rated at 20 mpg combined.
| Spec | Value |
|---|---|
| Price | |
| MSRP | $112,300 |
| MSRP with Destination | $113,295 |
| Destination Charge | $995 |
| Engine | |
| Engine Type | 4.7L V8 Biturbo |
| Displacement | 4.7 L |
| Horsepower | 449 hp |
| Torque | 516 lb-ft |
| Redline | 6,300 rpm |
| Valvetrain | DOHC, 4-valves per cylinder |
| Bore and Stroke | 92.9 x 86.0 |
| Compression Ratio | 10.5:1 |
| Injection Type | Twin-turbocharged V8 direct injection |
| Drivetrain | |
| Drive Type | RWD |
| Transmission | |
| Transmission | 9G-TRONIC 9-Speed Automatic |
| 1st Gear | 5.35 (34 mph **) |
| 2nd Gear | 3.24 (56 mph **) |
| 3rd Gear | 2.25 (81 mph **) |
| 4th Gear | 1.64 (111 mph **) |
| 5th Gear | 1.21 (151 mph **) |
| 6th Gear | 1 (183 mph **) |
| 7th Gear | 0.86 (213 mph **) |
| 8th Gear | 0.72 (254 mph **) |
| 9th Gear | 0.6 (305 mph **) |
| Reverse | 4.8 |
| Final Drive | 2.65 |
| Fuel Economy | |
| City | 17 MPG |
| Highway | 25 MPG |
| Combined | 20 MPG |
| Recommended Fuel | Premium Unleaded |
| Tank Capacity | 19.8 gal |
| Suspension | |
| Front Suspension | Independent multi-link with coil spring, single-tube shock absorber with continuously adjustable damping and tubular torsion bar |
| Rear Suspension | Independent multi-link with coil spring, single-tube shock absorber with continuously adjustable damping and tubular torsion bar |
| Turning Diameter | 36.2 ft |
| Brakes | |
| Front Brake Disc | 13.5 in diameter / 1.4 in thick |
| Rear Brake Disc | 12.6 in diameter / 0.94 in thick |
| Tires & Wheels | |
| Wheels Front | 8.5J x 19 in (Cast) |
| Wheels Rear | 9.5J x 19 in (Cast) |
| Tires Front | 255/40 R18 (note: source shows 19-in wheels with R18 tires) |
| Tires Rear | 285/35 R18 |
| Dimensions & Weight | |
| Length | 182.3 in |
| Width | 76.7 in |
| Height | 51.2 in |
| Wheelbase | 101.7 in |
| Front Track | 62.8 in |
| Rear Track | 63 in |
| Ground Clearance | 3.7 in |
| Curb Weight | 4,012 lbs |
| Interior | |
| Headroom Front | 39.1 in |
| Legroom Front | 42.9 in |
| Shoulder Room Front | 55.5 in |
** Theoretical max speed per gear at redline