directly with the larger 240 and 740 wagons. This did not stop independent suppliers ASC and Heuliez from designing station wagon models and presenting them to Volvo, while the Dutch company Toncar sold a bolt-on conversion which replaced the 440's tailgate with an add-on station wagon structure. First generation 400 series cars resemble the bigger 940, whilst the facelifted example bore a resemblance to the Volvo 850 to increase sales. The interiors of the 400-series variants were designed by famed British Volvo designer Peter Horbury. Safety Safety has always been an issue of primary importance to Volvo, who have developed many features since adopted widely throughout the car industry. Crumple zones were carried on from the previous 300 series into the design of 400 series cars, aided by additional airbags both for passenger and front driver. Other safety items included a high level brake light; a 'bulb blown' warning system; 'door open' warning light; adjustable seat belts with pretensioners and a seatbelt reminder/warning light: all of which all came as standard on all models throughout the range. Safety was further improved on models from 1993 onward with the introduction of Side Impact Protection System (or SIPS). This was virtually unheard of at the time, and was provided (again as standard) by the forerunner of the SIPS system used on all modern Volvo cars. United Kingdom models also included daytime running lights as standard, although these could be disabled by the dealer at the owner's request. The original advertising campaign for the 400 range centred on occupant safety. A family of crash test dummies appeared to 'survive' intact after driving the car through a plate glass office window some storeys up. Various other scenarios simulating crashes were employed in addition, all of which ended with the family walking away relatively unharmed — only to be used again in further crash tests. Continuously Variable Transmission (CVT) option At launch, Volvo decided to offer a four-speed ZF conventional style automatic transmission, even as they spent a few more years redesigning the DAF-derived constantly variable transmission (CVT) to work with engines with more torque than the ones used in the Volvo 340. The majority of automatic 440/460s thus had a conventional four-speed automatic. The CVT transmission, as fitted to the last generation 440/460 Series, used steel belts (as opposed to the rubber belts used in the 300 Series) and was known as Transmatic, although