E65 was the flagship model and the most technologically advanced car produced by BMW at the time. The following features were first introduced on the E65: Active anti-roll bars (active roll stabilisation) to reduce body roll when cornering. It uses a hydraulic servo in the middle of the anti-roll bar to actively counteract body roll and to reduce body roll without the traditional trade-off in ride comfort. Directional headlights (adaptive headlights) which electronically adjust the low-beam lights horizontally (during turns) and vertically (based on rear axle load). Also, the E65 was the first BMW available with bi-Xenon (HID) headlights. World's first car with an electric parking brake. This could automatically activate in stop-and-go traffic situations and when the ignition was switched off. World's first car to offer a 6-speed automatic transmission First BMW with DVD-based GPS automotive navigation system. Adaptive cruise control (ACC), however this was available in some markets on the previous generation 7 Series (E38). The optional automatic soft close system minimized the force required to close the doors and boot lid, and would completely close them if improperly closed. Two fibre-optic electronic networks: MOST Bus (media-orientated system transport) and "Byteflight" (safety systems bus). These busses operate at 22.5Mbit/s and 10Mbit/s respectively. Also, the I-bus, K-bus and P-bus were replaced by the K-CAN (Body-controller area network). This increased the system speed from 9.6kbit/s to 100kbit/s. Special models Long-wheelbase 7 Series (E66) The E66 long-wheelbase models, badged "Li" were introduced in June 2002. Long-wheelbase models are longer, allowing for extra rear legroom. The initial long wheelbase models were the 735Li, 745Li and 760Li. After 2003, 730Li, 730Ld, 740Li and 750Li models were added to the lineup. High security 7 Series (E67) The E67 high security 7 Series is an armoured variant of the BMW 7 Series. The 760Li high security was introduced at the 2003 Geneva Motor Show, with the 745Li high security model released later in September 2003. E65 high security models are designed to withstand attacks, and meet the requirements of the B7 weapons standard. Security features include a detachable multi-layer laminated windscreen, a remote starting system, a fire extinguishing system, a fresh air system, and under-body protection. High security models also feature run flat tyres, with Michelin's PAX system; which allows continuous driving at for approximately , with a puncture. BMW offers a buyback service for high security models up to seven years old, which are