A very reliable insider from BMW has shared some interesting titbits about the next 5 Series. Slated for a 2010 arrival the 5 will be sold as a 2010 model in countries like the US. With rivals fast catching up and some even overtaking the car, BMW has apparently planned a reply that will silence critics and regain it some lost market share, especially in regions like Germany where the Audi A6 and the new Mercedes-Benz E-Class have made serious sales inroads.

An important aspect of automotive development for the 5 is weight. Several methods were used to reduce the weight which is good for both performance and fuel consumption. Such measures include using lighter body construction materials and producing parts like water pumps, transmission cases and suspension mounts out of lighter substances.

Although quite related to the 5 Series GT, the sedan will only share a minimum number of body panels with its four-seater sibling. Among them are the door handles, the side indicator lights and the side mirrors. BMW has deliberately designed the car to look more compact than it actually is in order to help it stand out in a segment populated by cars that look quite large. The short overhangs, the low roofline and the wide track will ensure a lot of this happens.

EfficientDynamics systems are now an everyday part of most BMWs sold in Europe so expect to see the next evolution of the fuel-saving measures. Still on fuel, the 2011 5 Series will be fitted with hybrid power for two models. The first will be the same mild ActiveHybrid system used in the 7 Series while the other will be one from the X6 ActiveHybrid. Instead of the V8 petrol though the car will use a 3.0d engine.