Rack-and-pinion with speed-sensing power assist and Direct-steer
34.5 ft, curb-to-curb
Traction Control and Stability
Electronic Stability Program (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]
Dual-circuit 4-wheel disc with single-piston sliding front and rear calipers
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.
Brake Assist (BAS®) 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]
The SLK's sophisticated restraint system includes front air bags with dual deployment thresholds, as well as new head air bags, plus thorax side-impact air bags and knee bags for both driver and passenger.[*6]
NECK-PRO head restraints
In the case of a rear impact exceeding a preset threshold, NECK-PRO active head restraints move forward and slightly upward, reducing the distance between the head restraints and the heads of occupants. This action helps to reduce the possibility or severity of whiplash-type neck injuries.[*6]
Emergency Tensioning Devices (ETDs)
If a collision exceeds a preset threshold, the ETDs instantly remove slack from the seat belts.[*6]
Locking & Security
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. You can close all open windows from outside the vehicle, simply by holding down the "lock" button on the SmartKey remote while aiming it at the infrared sensor in the driver's door handle.
Night security illumination
The exterior lights can be programmed to turn on for a preset interval when you remote-lock your vehicle in darkness, to help light a path for you as you leave.
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.