Second-gen Mercedes-Benz CLA: Bigger, Wider, More Agile
Aerodynamics: intelligent solutions intelligently designed
On the way to series production, the aerodynamics of the new CLA underwent a considerably longer phase of optimization than its predecessor in the form of simulations, before the first measurements of models were carried out in the wind tunnel.
This was possible due to greater computing capacity, as well as more experience of working with simulation tools and their best possible use in the development process.
A key advantage of the simulation process is that it is easy to determine the exact proportions of the form, and to examine the effects of a change in form on flow at another point which is either before or after in the direction of flow, without it being necessary to make changes to the physical model.
Work on optimization was in close collaboration with the designers and was particularly intensive on the rear bumper, radiator grille, the fog lamp recesses (the relief-like diamond-shaped pattern of which was reduced to the edge on the CLA for aerodynamic reasons) and the height of the diffuser.
Totally new are the wheel-arch spoilers with their fins in the longitudinal direction; they help air to flow around the wheels with minimal losses. Integrated as standard at the front of the vehicle is a two-piece shutter system behind the radiator grille, which regulates air flow through the engine compartment. The almost complete underbody paneling encompasses the engine compartment, the main floor, parts of the rear axle and the diffuser.
Functions from the S-Class
The CLA has the very latest driving assistance systems with cooperative driver support, and thus provides the highest level of active safety in this segment with functions adopted from the S-Class. For the first time, the CLA is able to drive semi-autonomously in certain situations. To do this, it keeps a close eye on the traffic situation. Improved camera and radar systems allow it to see up to 1,640 feet (500 meters) ahead.
The CLA also uses map and navigation data for assistance functions. For example, Active Distance Assist DISTRONIC, as part of the optional Driver Assistance Package, is able to provide route-based support to the driver in numerous situations, and to predictively and conveniently adjust the speed, for example when approaching bends, junctions or roundabouts. Also on board are Active Emergency Stop Assist and the intuitively understandable Active Lane Change Assist.
The new CLA comes with enhanced Active Brake Assist as standard. Depending on the situation, it can effectively help to mitigate the consequences of rear-end collisions with slower-moving, stopping or stationary vehicles ahead, and even with crossing pedestrians and cyclists, or to prevent them altogether.
Active Lane Keeping Assist is able to warn the driver by means of pulsed vibrations in the steering wheel when the vehicle is unintentionally drifting out of its lane at speeds between approximately 35 and 125 mph. If the vehicle passes over a solid line, it can pull the vehicle back into lane by applying the brakes on one side. In the case of a dotted line, such intervention takes place only when there is a danger of collision with a vehicle in the adjacent lane (including danger from oncoming traffic).
PRE-SAFE PLUS can recognize an imminent rear-end collision from a vehicle from behind. If the danger of a collision persists, the system can also firmly apply the brakes of the stationary vehicle, thus lowering the risk of injuries by reducing the forward jolt caused by an impact from the rear.
LED Headlamps: better visibility in all conditions
Another example of automotive intelligence and the transfer of technology from the luxury segment to the compact class are the standard LED Headlamps and optionally available Active LED Headlamps. They allow extremely quick and precise, electronically controlled adjustment of the headlamps to suit the current traffic situation.
Each headlamp on the CLA incorporates 18 individually controllable LEDs. The daylight-like light color of the LEDs is easy on the eyes and has a positive effect on concentration. The road ahead is precisely and brightly illuminated. The tail lamps are also available with all- LED technology.
Drive system: start with the most powerful engine
At the trade show presentation in Las Vegas, the CLA on display is the CLA 250 with the powerful four-cylinder gasoline engine, paired with a 7G-DCT dual-clutch transmission, available with front-wheel drive or 4MATIC all-wheel drive.
The new Mercedes-Benz CLA will go on sale in the U.S. by late 2019.