Specifications

Dimensions


Key Features

The 2015 SL550 Roadster
MSRP $106,900*
Passenger capacity
2
Trunk Capacity
13.5 cu ft
Transmission type
7-speed automatic
Engine
4.7L biturbo V-8
Power
429 hp @ 5,250 rpm
Acceleration, 0-60 mph
4.5 sec
City fuel economy
17 mpg
Highway fuel economy
24 mpg

Interior Dimensions

Headroom
39.1 in
Hip Room
53.6 in
Shoulder room
55.5 in
Trunk capacity
13.5 cu ft (top up)
8.5 cu ft (top down)

More Exterior Dimensions

Overall height
51.8 in
Overall length
181.6 in
Overall width
82.6 in (w/mirrors)
Wheelbase
101.8 in
Coefficient of drag
0.29
Curb weight
4,001 lbs

Specs

  • Engine, Drivetrain, and Performance

    Engine, Drivetrain, and Performance

    Engine
    Net power
    429 hp @ 5,250 rpm
    Net torque
    516 lb-ft  @ 1,800-3,500 rpm
    Compression ratio
    10.5:1
    Construction
    Diecast alloy block and heads
    Fuel requirement
    Premium unleaded
    Fuel capacity
    19.8 gal
    Fuel economy
    City fuel economy
    17 mpg
    Highway estimate
    24 mpg
    Emission certification
    Bin5/ULEV II
    Drivetrain
    Transmission
    7-speed automatic
    Drive configuration
    Rear-wheel drive
    Final drive ratio
    2.65 : 1
    Performance
    Acceleration, 0-60 mph
    4.5 sec
  • Chassis and Traction Control/Stability Systems

    Chassis and Traction Control/Stability Systems

    Chassis
    Semi-active suspension with adaptive damping
    The semi-active Adaptive Damping System continually adjusts to driving inputs and the road surface, and can respond at each wheel in just 10 milliseconds to sharpen handling while the ride stays silky. Comfort and Sport modes let you tailor handling response and ride firmness to your present driving style. Virtually all components of the 4-wheel multilink suspension are made of rigid, lightweight aluminum.
    Steering type
    Rack-and-pinion with electromechanical power assist and Direct-steer
    Turning circle
    36.2 ft., curb to curb
    Traction Control & Stability
    Electronic Stability Control (ESP)
    This safety breakthrough first introduced by Mercedes-Benz continually monitors your driving inputs and the vehicle's motion to help keep it going in your intended direction, especially in corners and during evasive maneuvers. If it detects wheelspin, severe understeer (plowing), or oversteer (fishtailing), ESP® can brake individual wheels and reduce engine power to help bring the vehicle under control.[*4]
  • Brakes, Wheels, and Tires

    Brakes, Wheels, and Tires

    Brakes
    Braking system
    4-wheel disc, including perforated and internally ventilated front discs with 4-piston calipers.
    Adaptive braking technology
    Adaptive braking technology integrates a suite of advances. If you lift off the accelerator quickly, Predictive Brake Priming sets the pads closer to the discs for more immediate response when you apply the brakes. In the rain, Automatic Brake Drying periodically applies the brakes just enough to sweep water build-up from the discs. During uphill starts, Hill-Start Assist helps prevent unwanted rollback. And a brake HOLD feature can make long red lights or stopped traffic a little easier.[*5]
    Antilock Braking System (ABS)
    ABS senses impending wheel lockup under heavy braking and pumps the front brakes individually or the rear brakes together. This intelligent system can pump the brakes as needed up to 30 times per second, to prevent lockup and preserve the driver's steering ability.[*5]
    Brake Assist (BAS®)
    Brake Assist senses emergency braking via the speed at which the driver presses the brake pedal and immediately applies maximum available power boost. Brake Assist can potentially reduce the overall stopping distance by eliminating the delay caused by a common human tendency not to brake hard enough, soon enough. Letting up on the brake pedal releases Brake Assist.[*5]
    Wheels/Tires
    Wheels
    Twin 5-spoke, 8.5x18-inch front and 9.5x18-inch rear
    Tires
    255/40R18 95Y front and 285/35R18 97Y rear
  • Safety and Security Systems

    Safety and Security Systems

    Safety Features
    ATTENTION ASSIST®
    The first system of its kind, ATTENTION ASSIST continuously monitors different parameters of driving behavior, and can automatically alert the driver with both visual and audible warnings if it detects signs of drowsiness on long trips.
    PRE-SAFE®
    Another Mercedes-Benz safety breakthrough, PRE-SAFE® can detect instability during certain vehicle maneuvers that suggest a collision or rollover is imminent. It can then tighten the seat belts, adjust the occupied passenger seat, and close the front side windows, all in an effort to better prepare the occupants in the moments before a collision. If no accident occurs, you simply readjust your seat, reopen the windows, and continue on your way.[*6]
    Mercedes-Benz mbrace
    From your car, your computer or your compatible smartphone, mbrace® offers the industry's most comprehensive range of features for more connected, safe and productive drive time. From making your everyday life easier to helping out in an emergency, mbrace combines advanced cloud-based and GPS technology with 24-hour support from helpful experts. The mbrace hardware is standard, and a trial period for each of the three mbrace Packages is included.[*8,*9,*10]
    Restraint Systems
    Integrated Restraint System
    The sophisticated restraint system includes front air bags with dual deployment thresholds, as well as innovative head air bags, plus thorax side-impact air bags and knee bags for both driver and passenger.[*7]
    Seat belt technology
    Equipped with Emergency Tensioning Devices (ETDs) and belt force limiters, 3-point seat belts are arguably our most important passive safety feature. If a collision exceeds a preset threshold, the ETDs instantly remove slack from the seat belts. Belt force limiters allow a slight amount of give in the seat belts and reduce the peak seat-belt forces on the occupant.
    Occupant Classification System (OCS)
    OCS automatically turns the passenger's front air bag on or off and adjusts the air bag inflation rate based on the weight category determined by weight sensor readings from the passenger seat.
    Locking & Security
    SmartKey
    The SmartKey remote control integrates remote door locks and trunk opener, a removable valet key, and a remote panic alarm. You may selectively unlock only the driver's door and fuel filler, or both doors plus the trunk and fuel filler.
    Locator lighting
    Locator lighting uses the car's lights to help illuminate a return path when the car is remote-unlocked in darkness. Unlocking the car also activates the illuminated entry system.
    Emergency trunk opener
    An emergency release lever is located inside the trunk and illuminated for 60 minutes after the trunk lid is closed.
    Night Security Illumination
    Night security illumination uses the car's exterior lights to help illuminate a path after parking.
    Driver-programmable driveaway locking
    Automatically locks the doors when the car reaches 9 mph.
    Antitheft alarm with remote panic feature
    The standard antitheft alarm system is armed automatically when you lock your Mercedes from the outside. It sounds the horn and flashes the exterior lights if a door, the trunk or the hood is opened without first unlocking the vehicle. You can also sound the alarm by pressing the red “panic” button on your SmartKey remote when you’re within range of your vehicle.
    Integrated 3-button garage door control
    Compatible with HomeLink® components and some other systems.
    mbrace Remote Door Unlock
    Allows remote unlocking of the vehicle via the mbrace Mobile App or via telephone.
    mbrace GPS-based Stolen Vehicle Recovery
    Helps law enforcement agencies track and recover stolen vehicles.
    mbrace Antitheft Alarm Notification
    Alerts Mercedes-Benz to contact vehicle owner if antitheft alarm sounds.