Despite these increased dimensions, the E65 7 Series is only heavier than the E38. Interior styling The E65 contained many departures from automotive interior design conventions. BMW removed the traditional console mounted gear selector, replacing it with a steering-column mounted stalk in favour of two cup holders. The e-brake is controlled using a button on the dashboard. The seat adjustment controls were moved from their traditional place on the side of the seat base to the inside of the raised central console, which drew some criticisms. Unlike most BMWs since 1975 (including the E65's predecessor and successor), the centre instrument panel is not angled towards the driver. Engines The V8 models were the first to use the then-new BMW N62 V8 engine, which was the world's first engine to use a continuously variable-length intake manifold. It was also BMW's first V8 engine to use variable valve lift (Valvetronic), replacing throttle butterflies for added response, efficiency and power. A system using traditional throttle butterflies was also present as a backup in case of faults in the valvetronic system. Petrol Diesel Transmissions The E65/E66 was the first sedan to use a 6-speed automatic transmission. The specific models of transmission used for the E65 are: 6-speed ZF 6HP26 automatic (730d / 735i / 740i / 745i / 750i / 760i) 6-speed ZF 6HP19 automatic (730i) 6-speed ZF 6HP32 automatic (740d / 745d) The E65/E66 was one of the few BMWs to have a column shift lever, as opposed to a stick in the centre console. iDrive The E65 was the first BMW to use the iDrive infotainment system. The iDrive system was built on VxWorks while the navigation system was built on the Windows CE for Automotive platform, and featured an interface primarily based around a central control knob. Many of the functions such as climate, navigation, seat heating, telephony, and car settings were incorporated into a single system allowing for centralised control. Early versions of iDrive were criticised for complicated menu structures and a steep learning curve. The first generation of the system relied on CD media for map data. In March 2003, the maps switched to DVD format, a faster processor was used and a 'Menu' and 'Customisable' button were added below the control knob. In 2005, dedicated buttons were added to change radio stations or skip tracks and a brighter screen was used for the 8.8" widescreen option. Equipment The