The 325Ci Convertible can change your perspective with one extraordinary drive. Of course, a silky-smooth, 184-hp inline 6-cylinder engine can do that to a driver. But when the top is dropped at the touch of a button, the vehicle's incredibly crisp handling is enhanced by the sense of crisp air rushing overhead. And with a Rollover Protection System (RPS) and Dynamic Stability Control (DSC) on board, there's no reason to stop exploring all the possibilities that lie ahead, and above. Úses infrared light to measure the amount of rain. When the wipers are in the 'intermittent' mode, the rain sensor automatically adjusts the windshield-wiping interval as needed.
All Season Traction (AST)
Provides three mode choices: 'Drive' incorporates BMW's adaptive transmission control; 'Sport,' a more dynamic shift pattern; and STEPTRONIC, the hands-on control of a manual without using a clutch.
All Season Traction, part of Dynamic Stability Control, provides better stability and control in slippery road conditions all year long - packed snow, ice, rain- or oil-slicked roads, and sandy or rough surfaces. The system continually processes data from the anti-lock braking wheelspeed sensors. Any time a rear 'drive' wheel begins to lose traction, the system modifies the engine's electronic throttle and ignition timing to reduce torque. It also can act on each rear brake individually or simultaneously, as needed, to bring wheelspin under control. Dynamic Traction Control aids driving in deep snow or sand.
Check Control helps the driver to be aware of the operational readiness of important functions, such as the lighting system and fluid levels. A pictogram display indicates the location of the feature that requires attention. Warnings are shown in the Check Control display at the bottom of the main instrument cluster, and are prioritized according to urgency. On-board computer functions can also be shown in the Check Control display, if desired.
Double VANOS allows the engine to 'steplessly' choose valve timing for both intake and exhaust camshafts. Electronically controlled in response to engine speed, load and temperature, Double VANOS maximizes engine response, efficiency and emission control. The benefit: more low- to medium-speed torque for strong acceleration and added flexibility for better highway performance, plus quieter, smoother engine at idle. Dynamic Brake Control
Dynamic Brake Control is another important safety feature, crucial in extreme braking situations (such as when avoiding an accident). When it is necessary to build up brake pressure as quickly as possible, Dynamic Brake Control can speed up and reinforce this process, helping to provide the shortest possible stopping distance. Dynamic Stability Control
Dynamic Stability Control is an innovative technology that combines the functions of traction control, braking enhancement, and cornering stabilization. DSC sensors continually monitor cornering-steering angle, transverse acceleration, yaw, wheel speed and brake pressure to instantly detect and correct loss of wheel traction due to slick spots, nasty weather, or emergency maneuvers. DSC helps you stay in control under all conditions, in any situation. Service Interval Indicator
Recognizing that each vehicle is used differently - and so the need for routine maintenance is different for each vehicle - BMW developed the Service Interval Indicator. This device continually analyzes the way the BMW is driven, and uses this analysis to determine when it needs servicing - not just based on miles driven. The basic Oil Service includes a change of engine oil and filter, and select other maintenance items. Long-life sparkplugs are designed for a service life of 100,000 miles. Vehicle & Key Memory
Handy Vehicle & Key Memory features can activate special convenience and safety features already programmed in the 3 Series. Vehicle Memory offers the choice of activating/deactivating Daytime Running Lights, an anti-theft motion detector, and 'Pathway Lighting' - headlights that stay on for 40 seconds after turning off the ignition.
With Key Memory, up to three keys can be separately programmed to individual preferences. Choose to unlock just the drivers door or both doors with the first press of the keyhead remote. Key Memory can also be programmed to relock the vehicle automatically when it reaches 5 mph. Key Memory can return the drivers seat to the same position as the last time that key was used; similarly, it can return climate control to the previous setting used.Source - BMW