Further evolution on the efficiency front is a big issue among carmakers.
Not to be left in the dust, BMW has a wide range of innovations - covering lightweight construction, smart energy management and laser headlights. While such efforts used to focus on the engine, today it's about an overall concept. That includes using innovative materials for weight reduction.
Smart and sensible driving also helps to save fuel. And these days, you can get smart assistance from the car itself. When changing gears, for example - or when overtaking. Thanks to sensors detecting the driving situation, the vehicle accelerates only as much as is needed to pass safely.
Another crucial part of the economy puzzle is the increasing trend towards alternative drive systems. This X5 is a plug-in hybrid prototype that has an all-electric range of 30 kilometers. Also on board is a smart automatic transmission that helps select the right mode. The X5's design makes it predestined for this new kind of powertrain.
When it comes to key components such as the electric motor, high-voltage battery and power electronics, BMW invests heavily in in-house solutions. That ensures all these parts will meet the specific requirements of the model.
Electric-run devices are another fuel guzzler. Here, for example, we have headlamps without precedent - using laser technology.
Efficient mobility is like a jigsaw puzzle: made up of many little parts that only work when combined in exactly the right way.