With AMG calibration and components, the 4-wheel independent suspension of the GLA45 teams tenacious handling with refined composure. Front struts and wishbones team with a four-link design at the rear, all featuring rigid yet lightweight components with firmer spring and damping rates and a more aggressive, lowered stance.
Rack-and-pinion with electromechanical power assist
Traction Control & Stability
AMG Performance 4MATIC all-wheel drive
AMG Performance 4MATIC® all-wheel drive is cleverly integrated with the gearbox, for class-leading lightness. A multiplate clutch in the rear differential instantly varies the torque split, with cornering agility further enhanced by 3-stage ESP® and torque-vectoring Curve Dynamic Assist. From more confident cornering to more capable handling in any season, on any road, it's all-wheel drive of a higher order.[*4]
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]
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]
COLLISION PREVENTION ASSIST PLUS uses radar-based technology to help detect an impending collision with a vehicle ahead, or even some stationary objects, based on your speed and distance. In addition to alerting the driver, its Adaptive Brake Assist with autonomous braking can automatically apply up to 100% of the car's braking force in certain situations, to help prevent a collision or reduce its severity.[*7]
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.[*8]
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. Three mbrace packages are offered, and every 2015 Mercedes-Benz includes a 6-month mbrace trial subscription.[*9,*10,*11]
Integrated Restraint System
An advanced system of 8 air bags offers 10-way occupant protection. Dual two-stage front air bags, front side-impact head/torso air bags, dual front knee air bags, and side curtain air bags for both seating rows are standard.[*12]
Side curtain air bags
In a side impact exceeding a preset threshold, a multi-chamber air bag deploys along the front and rear side windows on the affected side of the vehicle. An integrated rollover sensor automatically deploys the ETDs and, if deemed necessary, the side curtain air bags in the event of a detected rollover.[*12]
Seat belt technology
Arguably our most important passive safety feature, all four outboard 3-point seat belts are equipped with Emergency Tensioning Devices (ETDs) and belt force limiters. If a collision exceeds a preset threshold, ETDs instantly remove slack from the seat belts. Belt force limiters allow a slight amount of give in the seat belts, to reduce the peak seat-belt forces on the occupant.
Occupant Classification System (OCS)
OCS automatically turns the front 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 front passenger seat.[*13]
ISOFIX / Universal LATCH system (Lower Anchors and Tethers for Children)
Standardized child-seat attachments are provided at both outboard rear seating positions. Selectable passenger seat-belt retractors help secure child seats.
Locking & Security
The SmartKey remote control integrates remote door locks and power liftgate opener, a removable valet key, and a remote panic alarm. You may selectively unlock only the driver's door and fuel filler, or all doors plus the liftgate and fuel filler.
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.
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 liftgate 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.