"Step on the gas!" - Drive it! is taking that literally for once. We test the Seat Leon ST TGI - a bi-fuel model that drives on either gasoline or natural gas. The internal combustion process for natural gas is similar to that with gasoline.The gas is mixed with air, as with gasoline, and ignited in a cylinder. Driving with natural gas means emitting 123 grams of CO2 per kilometer -- 40 grams less than with gasoline. And carbon monoxide and nitrogen oxide emissions are cut by about 80 percent.

Off to the future! -- Drive it! reports on the future of Europe's streets with a virtual cockpit, self-driving buses, and compact cars powered by sustainable energy.Present it!: Audi Q2Audi presents the newest member of the Q family: the Q2, with off-road qualities and an off-road appearance. The Q2 offers the good visibility of an SUV, but is primarily at home in the city. Its connectivity and infotainment are up to luxury-class standards.On an optional touchpad, the driver can zoom into the map, while his passengers use a WIFI hotspot to surf or stream with their smartphones or tablets. If desired, the speedometer and rev counter glow in a completely digital virtual cockpit whose 12.3-inch monitor shows brilliant, high-resolution graphics.Test it!: Infiniti Q70The Q70 is the flagship of the Japanese premium brand Infiniti. We'll test the Q70 2.2d with the 4-cylinder diesel engine Infiniti developed in cooperation with Daimler and with a 7-speed automatic transmission operated with steering wheel paddles.Even the entry-level version we drove has full LED headlights, chrome accents on the front grille, a rear-view camera, front and back parking sensors, and 18-inch wheel rims -- along with Infiniti's typically generous standard fittings.Picture it!: Mercedes-Benz Future Bus with CityPilotMercedes-Benz's Future Bus with CityPilot shows how public transport may look in the future. Thanks to CityPilot, the municipal bus is partially self-driving, making it safer and more efficient than conventional buses. It's also more comfortable.The technology -- connectivity, camera and radar systems with data fusion -- is spectacular, but the Future Bus also has an innovative interior design. The bus and its technology are milestones on the path to accident-free, autonomous driving.Taste it!: Seat Leon TGI"Step on the gas!" - Drive it! is taking that literally for once. We test the Seat Leon ST TGI - a bi-fuel model that drives on either gasoline or natural gas. The internal combustion process for natural gas is similar to that with gasoline.The gas is mixed with air, as with gasoline, and ignited in a cylinder. Driving with natural gas means emitting 123 grams of CO2 per kilometer -- 40 grams less than with gasoline. And carbon monoxide and nitrogen oxide emissions are cut by about 80 percent.Vintage: Apollo 3500 GTThe Apollo 3500 GT is unmistakably a sports car with Italian contours. Inspired by the European icons of the time, like the Jaguar E type and especially Pininfarina’s extravagantly expensive designs for Ferrari. But the Apollo 3500 GT is not purely Italian.Under the hood is a V9 engine made by the US auto maker Buick. 3.5-liters of displacement are the source of the sporty sound and the power in this car that weighs only about 1,000 kilos. At the top of fourth gear, the 200-horsepower Gran Tourismo runs at 210 km/h. That was pretty fast in the early 60s. Only about 70 Apollos were built, all betwen 1962 and 1968. It's estimated that 40 of them are still around.

The Apollo 3500 GT is unmistakably a sports car with Italian contours. Inspired by the European icons of the time, like the Jaguar E type and especially Pininfarina’s extravagantly expensive designs for Ferrari. But the Apollo 3500 GT is not purely Italian.Under the hood is a V9 engine made by the US auto maker Buick. 3.5-liters of displacement are the source of the sporty sound and the power in this car that weighs only about 1,000 kilos. At the top of fourth gear, the 200-horsepower Gran Tourismo runs at 210 km/h. That was pretty fast in the early 60s. Only about 70 Apollos were built, all betwen 1962 and 1968. It's estimated that 40 of them are still around.

Mercedes-Benz's Future Bus with CityPilot shows how public transport may look in the future. Thanks to CityPilot, the municipal bus is partially self-driving, making it safer and more efficient than conventional buses. It's also more comfortable.

Audi presents the Q2, the newest member of its Q family, with off-road qualities and an off-road appearance. The Q2 has the good visibility of an SUV, but is at home primarily in the city.

The Volvo S90 is the Swedish carmaker's latest luxury sedan. Volvo is taking a new tack both technologically and visually.The design is based on the XC90 and promises to be a hit. Everything is elegant and luxurious rather than boxy. The Volvo S90 T6 AWD Inscription we tested has 235 kilowatts of power and costs 61,450 euros in Germany. It comes with the "Pilot Assist" semi-automatic driving system.

718 is now the prefix in the names of Porsche's Boxster and its coupe, the new Cayman. The number 718 recalls Porsche's sports car with the 4-cylinder, midsized engine that had such racing success in the late 1950s.The 718 Cayman has a newly developed turbocharged 4-cylinder engine in two variants: 2 liters or 2-and-a-half liters displacement. We tested the 718 Cayman on a racetrack near Malmö, Sweden. Thanks to Launchcontrol, the car sprints from zero to 100 in 4.2 seconds.

For many people this is the time of year when they head out on holiday. And who doesn’t love a road trip? But for the car, a long drive in hot weather, loaded down with family and luggage, is hard work.That’s why a pre-holiday checkup is a good idea. The first-aid kit should to be up-to-date, complete and easily accessible. And when it comes to packing luggage in the trunk, following a few important rules will also help keep you safe.

Jeep Cherokee, a name with tradition whose roots go back to 1974. The current version's seven air intakes in the radiator grille make it look a bit like a space shuttle. We tested the Cherokee with the 2.2-liter diesel engine, which delivers 147 kW.It has all-wheel drive and a 9-speed automatic transmission. But behind this modern appearance does this car have off-road capacity, like you'd expect from a Jeep? We wanted to know, and so we took the Cherokee into the woods.

The World Endurance Championship, or WEC, is in its fifth season. There are nine races on three continents in the long-distance motor sports competition. It hit Germany in late July at the Nürburgring.Three vehicles take around 6 hours to complete the 5,148-kilometer Grand Prix at the Nürburgring. As expected, the Porsche, Audi and Toyota hybrids jump out to early leads. Drivers need a good feel to be able to pilot the hybrid sports cars. They're only allowed to use 1.8 liters of gasoline and 1.3 kilowatts of electricity per lap.