Response system. The automatic gearbox was an option on this model. The 3.0-litre Gen III model (only with automatic gearbox) is also available in the GS trim level. The Discovery 4 also features a redesigned interior (in keeping with the new styles introduced elsewhere in the LR range for 2010). The instrument cluster is updated with redesigned analogue speedometer and tachometer gauges for improved clarity. The analogue temperature/fuel gauges of the previous model and the electronic information display are replaced by a single TFT screen capable of displaying information in a variety of modes and formats. The interior also has a new centre console, which includes redesigned and simplified switches and controls. The Discovery also has a new seat design and a wider range of available interior materials – some previously only seen in Range Rover models. The stated aim of the interior redesign was to lift the vehicle upmarket, with higher-spec models now aimed at the luxury and executive markets. The car gains some electronic systems from the Range Rover lineup, such as the optional 'Surround Camera System' – a series of cameras located in the front bumper, door mirrors, and rear tailgate handle which can display their images on the centre console screen to improve visibility (although the image quality of this system was downgraded by Land Rover around 2014). Other electronic systems are intended to improve efficiency – the engines feature a 'Smart' alternator that only charges the battery when engine load is low, thus helping to reduce fuel consumption when the engine is working harder. The Discovery 4 was unveiled in the summer of 2009 and went on sale in the United Kingdom on 1 September that year. A Commercial van variant was released in the UK at the same time using the 2.7 engine and offered in GS and XS trim levels. In the Republic of Ireland a Commercial van was offered from 1 January 2010 based on the XE 2.7 manual and HSE 3.0 auto engines. An armoured Discovery with B6 ballistic level of protection was announced in 2010. It offers numerous safety features designed to protect the occupants, including protection from grenades and small arms fire. The vehicle is indistinguishable from the standard LR4. For the 2011 model year announced late 2010, the 2.7-litre engine was dropped and two versions of the 3.0-litre engine were made available – one called the TDV6 and