inspected then resold to potential customers worldwide. A training course is also offered to owners and chauffeurs, and teaches car control in case of emergency situations. Hydrogen 7 (E68) The BMW Hydrogen 7 is a limited production hydrogen-fueled model. It uses a modified version of the 760Li's N73 V12 engine, producing . Claimed fuel economy is and the hydrogen is stored as a liquid in an insulated tank. Only 100 cars were made, which were leased to high-profile customers, in order to promote the use of hydrogen vehicles. Alpina B7 The Alpina B7 prototype was introduced to the public at the 2003 Geneva Motor Show in March, and the production version was later unveiled at the 2003 Frankfurt Motor Show. Production began in February 2004, and was built in the Dingolfing BMW plant alongside the regular E65 models. The Alpina B7 uses a supercharged version of the 4.4-litre V8 found in the 745i, and was the first Alpina model to feature a supercharged engine. Exterior changes include a rear spoiler and 21-inch traditional Alpina multi-spoke style wheels. Interior changes include sports seats, an Alpina instrument cluster, a three spoke steering wheel with shift buttons, and a silver plated production plaque. A total of 1114 cars were produced, including 803 cars for North America. Yearly changes 2003 iDrive updates including faster processor, addition of "menu" and "customisable" buttons and maps switching to DVD format. 2005 facelift In March 2005, the facelift (also known as "LCI") models began production. The major changes were: Revised styling for front and rear bodywork, headlights, tail-lights, and a less pronounced trunk lid to address the criticisms of the pre-facelift design. BMW offered "conversion kits" that could be purchased by existing owners to apply these exterior changes to pre-facelift cars. iDrive updates including a simplified interface, clearer graphics, and the iDrive controller now having a leather top surface. Petrol V8 engines increased in displacement, resulting in the 735i model being replaced by the 740i and the 745i being replaced by the 750i. 745d model power increased from 220 kW to 242 kW. Rear track width increased by . Adaptive cruise control upgraded to ACC II. Late 2005 In late 2005, night vision (BMW night vision) became available. The system uses passive infrared sensors and has a claimed range of . Automatic highbeam headlamps (BMW high-beam assistant) was introduced at the same time, whereby the high beam headlights