Quattro Seda on 2040-cars

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Adam Carolla is world's the least helpful test drive co-pilot

If you were going to test drive a new car, who would you want to take with you? Your spouse? A friend? Maybe an automotive journalist? Well take it from us: there's one of us riding shotgun just about every time we go to drive anything, and we're not all we're cracked up to be.
How about a celebrity comedian? Well, that largely depends on which comedian we're talking about here. Some - say, Jerry Seinfeld or Jay Leno, for example - might be more helpful than others, being more or less schooled in the finer points of the modern automobile. Adam Carolla might seem like he belongs on that list too, but in this latest video for a friends at Edmunds.com, the one-time host of The Car Show on Speed TV seems bent on being as comedically intrusive as possible. Which may be funny, but helpful? Not so much. See what we mean in the video below, and the next time you go to test drive a new car, you just might find the world's most popular podcast host climbing in with you.

24 Hours of Le Mans an on-and-off love affair

There was little usual about this year's 24 Hours of Le Mans - intermittent rain in the weeks before the race meant cars didn't get on track as much as they wanted, and intermittent rain during the race meant cars went off track a lot more than they wanted. The race started with a wet track, and one of the records broken because of the random downpours was the number of times the safety car led the field - 11 times this year - although the record of two hours and 53 minutes of lapping behind the safety car, set in 2011, was not eclipsed.
None of that served to dampen the action. With little more than an hour left in the race there were cars still only a few seconds apart fighting for position, leads still changing because of pit stops and everyone drafting anyone they could.
Things didn't go the usual way up front, either - well, not exactly...

US diesel model count to double for 2014?

While diesel cars are popular on most other continents, these less-complex alternative to hybrid-electric vehicles have yet to gain major traction in the US. As an increasing number of light cars and trucks start to offer these fuel-efficient engines, though, sales are expected to climb as well. While BMW, Mercedes-Benz and the Volkswagen Group (Volkswagen, Audi and Porsche) continue to lead the way, more non-German automakers like Mazda, Nissan, Chrysler and General Motors are starting to get serious about diesel in America.
TheDetroitBureau.com reports that the 2014 model year will see the number of diesel vehicles offered in the US double to about 40 nameplates, but the news gets even better for fans of these torquey and efficient powerplants. LMC Automotive has released data about future expectations of diesel cars in the US, and it predicts that sales should be very close to one million units in 2015 (up from an expected 600,000 units this year). By 2018, LMC's calculations suggest that sales will more than double from this year's expected totals accounting for almost 8 percent of new light-vehicle sales.