The buttons and controls are arranged according to the principles of ergonomic design. They are positioned in order of either the importance of their functions, the frequency with which they are used or stylistic considerations. For example, the striking red button for the hazard lights is located in the upper-most position, within equally easy reach of the driver or front passenger. Underneath – depending on which has been specified – is the radio or navigation system, whose colour displays are positioned well within the driver’s field of vision. Next to bottom in the switch order on the centre console is the control unit for either the standard-fitted air conditioning or optional THERMOTRONIC automatic climate control. The latter stands out with its user-friendly and attractive rotary-type switch for manual adjustment of the fan speed (right) and air distribution (left). A switch strip with buttons for optional extras such as seat heating, PARKTRONIC, tow-away protection and interior motion sensor forms the bottom line of the centre console.

Buttons with convenient push-push control

The technology and functional principles behind the development of the buttons were also established on the back of knowledge compiled in touch-and-feel tests conducted by DaimlerChrysler research engineers and involving the input of 120 drivers. The tests involved assessing the force needed to operate the buttons and the force/path values, as well as the drivers’ sensual perception of the buttons when pressing them and when hearing the “click” sound. The results of the tests have helped produce a new generation of buttons based on the so-called “push-push” principle. In other words, a single press of one of these buttons is enough to activate or deactivate the function concerned. The buttons lock into position with a satisfying “click”, which doubles up as an audible confirmation that the required function has been successfully engaged.

The centre console leads down to a tunnel trim section, whose level design (standard) allows the integration of further stowage areas and a cup holder. A raised version of the tunnel trim can be ordered as an option, complete with a fore/aft sliding armrest and a stowage compartment drawer function for mobile phones.

High-class combination of materials in the door panels

The interior door panels also reflect the commitment of the Mercedes engineers to bring together attractive design and pleasant touch-and-feel properties. They achieve this aim by combining fabric (top) and scratch-resistant plastic (bottom), which has a new double-gloss grain-effect finish. This eye-catching styling is further enhanced – depending on the equipment line – by a striking trim strip in wood or aluminium. Discreet chrome surrounds adorn the grilles on the door-mounted speakers of the ELEGANCE and AVANTGARDE models.

The wide armrests integrated into the interior door panels are pleasantly soft and, as such, extremely comfortable. The attractively styled controls for the power windows and exterior mirrors are integrated into the door panels within easy reach of the driver/front passenger.