Audi SA plugs a 2.0 TDI Efficiency model into its A4 range and adds a neat new tool to up the efficiency on its other models.Audi SA’s range currently includes three models that emit fewer than 120g/km of carbon emissions and are, therefore, exempt from CO2 taxation. Several Audis sold in South Africa are also fitted with a range of fuel-saving technologies and features such as Start-Stop and energy recuperation are standard on most models. To bolster its cause for greater efficiency, Audi’s new A4 2.0 TDI Efficiency sedan replaces the previous 2.0 TDI. Its performance remains unchanged, but the CO2 emissions have reportedly dropped from 119 to 115 g/km, while the average fuel consumption on the combined cycle is down from 4.6 to 4.4 litres per 100 km. The 2.0 TDI Efficiency costs R350 000. The new A4 derivative, along with three-door and Sportback versions of the A3 1.6 TDI S tronic, falls beneath the 120g/km CO2 emissions threshold introduced by government on September 1, 2010. The introduction of the A1 range early in 2011 will see an additional four models fall beneath this mark. Audi reports that the 1.6 TDI version of the A1 will emit 103 g/km of CO2. All A1s in South Africa will also feature start-stop technology as standard equipment. In 2011, also look out for start-stop on the A3, A7 Sportback, 3.0 TDI A8 and the new A6 range.Until then, as part of their regular running changes, all 2011 model year Audi excluding the current A6 and R8 ranges are fitted as standard with a Driver Information System trip computer. DIS comes with an Efficiency programme that provides the driver with economical driving tips based on the driving conditions and suggests gear changes on manual models. The system is also able to advise the driver if additional drag is created by an open window or sunroof, or whether seat heating is turned on for a seat without a bum to warm.