Big enhancements are being added to automobiles. Soon you can drive around like a new aged Knight Rider, participating in trending topics while pumping gas. Hit the jump to see what other enhancements are in the works.

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Undaunted by fear of safety regulations, auto makers are piling new technologies into their vehicles: everything from 17-inch dashboard screens to services that check Facebook and buy movie tickets.

This newfound confidence comes as a push for national regulations governing driving and cellphone use—including the suggestion of a total ban—has petered out.

With Americans increasingly glued to devices and their constant flow of information, the auto makers are rolling out what they call the “connected car.” These vehicles can do everything from book a restaurant to delivering Twitter feeds—all at 65 miles an hour.

There is more to come, too. Software to import iPhone and Android applications is around the corner.

Gadgetry is taking on added importance for the auto makers, who are starting to fret that number of teenage drivers is declining and more 20-somethings aren’t sold on owning a car.

General Motors Co. this spring will release an 8-inch, touch-screen display for online applications, navigation and music that can be activated through voice, touch or steering wheel controls. Ford Motor Co. already allows drivers to receive Twitter feeds and stream online music through its Sync technology. New Mercedes-Benz cars this spring will tap into Facebook and perform Google searches. Mercedes drivers won’t be able to enter text while the car is in drive, but prewritten phrases can be selected with a click.

Customers say they love the electronics. “I like the way it looks,” said Jamie Kaye Walters, 38, a television production company executive who recently bought a 2012 Ford with the Sync system. “It’s a little bit distracting, but it kind of allows me to do work while I am driving without having to look down at my phone. I can do the whole thing with voice activation.”

Auto makers say the hands-free features of these systems are safe—or at least safer than allowing drivers to thumb through their phone contact lists to initiate a call or text a friend. They have argued to regulators that greater safety can be achieved with steering-wheel and voice controls.

“It isn’t possible to stop it,” said Michael Sprague, marketing director at Kia Motors Corp.’s North American division. “Consumers are going to continue to drive with phones and all we can do as a manufacturer is to provide what the consumers are asking for and make it as safe as possible.”

Rob Reynolds, executive director of FocusDriven, a distracted driving prevention group, said greater safety doesn’t equal safe. “The attitude that auto makers are taking is that we want to make distracted driving safer than ever,” said Mr. Reynolds, whose 16-year-old daughter was killed in an accident by a distracted driver. “They are putting a big filter on your cigarette so it will take longer to kill you.”

Auto makers point to studies, including one by researchers at Virginia Tech Transportation Institute, which show that talking on a cellphone increases the risk of a crash or near-crash by 1.3 times over regular driving, while physically dialing a number increased the risk 2.8 times. A person is more than 20 times more likely to be in a crash or near crash while sending text messages.

Such data, which was gathered by monitoring hundreds of hours of drivers with cameras in day-to-day driving, has guided auto makers and the administration to the conclusion that “hands-free” activities are safe. Other studies, including one by University of Utah researcher Michael Strayer, show that talking on the phone, hands free or not, is equally dangerous. Most of newer car-electronics systems permit access to controls through a touch screen.

Still, lobbyists for several auto makers said they sense a change in tone from the administration and no longer expect limits on the technology. Transportation Sec. Ray LaHood recently decided against holding a third-annual Distracted Driving Summit this year and signaled he won’t challenge auto makers that are integrating cellphones into their dashboard marvels.

Hands-free calling “isn’t the big problem in America,” Mr. LaHood said, after a December proposal by the National Transportation Safety Board called for a complete ban on cellphone use while driving. Another group, the National Highway Transportation Safety Administration, is studying cognitive distraction caused by the new technologies with a report expected late this year. “When the results are out, we will know more about whether these technologies are a distraction,” Mr. LaHood said.

NHTSA’s study will assess hands-free, semi-hands free and hand-held mobile phone use and assess the risk and distraction associated with each, the administration said.

The Transportation department also is nearing the completion of a set of electronics guidelines for auto makers that will dictate certain safety protocols. These are expected to be out in a few weeks. Lobbyists for several auto makers said the new guidelines, which aren’t enforceable, will largely follow what auto makers are already doing.

Among the coming in-car devices is a 17-inch touch screen display with Internet access and four USB ports to attach devices in the Tesla Model S electric car. Ricardo Reyes, a spokesman for the company, said the company wants to make sure that electronics in the car are cutting edge, like the vehicle itself.

“It is absolutely a selling point,” Mr. Reyes said. “People are already distracted by their phones in their car, but we can make it safer for them to do what they are already doing.”

WSJ