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2016 Mercedes CLA and GLA get more power, quicker

Unlike in Europe, Mercedes-Benz doesn't have hyper hatches like the Audi RS3 to compete against in North America, at least not yet. However, the company isn't letting its high-performance compacts get behind the times anywhere in the world with the announcement that the CLA45 AMG and GLA45 AMG in the US are getting practically the same raft of upgrades as the ones across the pond. Both models go on sale in October in US dealers. Like its European counterpart, the 2.0-liter turbocharged four-cylinder in the diminutive AMGs receives upgrades to produce 375 horsepower and 350 pound-feet of torque (the 381 hp rating over there is in metric ponies). That's an impressive 20-horsepower and 18 lb-ft bump over the current version of the mill. Beyond just the boost in output, quicker acceleration comes from revised, more aggressive ratios in third through seventh gears. The latest AMGs make great use of their upgrades, too. The 2016 GLA45 now clocks the run to 60 miles per hour in 4.3 seconds, a staggering half-second quicker than the 2015 model. The CLA45 slices 0.3 seconds off its time to make the sprint in 4.1 seconds, which gives the sedan the same acceleration as a SL63 AMG. In addition to the powertrain tweaks, the 2016 models get a few other added luxuries. As in Europe, they receive the Dynamic Select System that uses a rotary knob select from multiple driving modes. Inside, there's standard keyless start, dual-zone climate controls, and Mercedes' latest infotainment unit. A "Turbo 4Matic" badge on the fender now hints at the vehicles' performance potential. The new Dynamic Plus Package is the major addition to the options list. It combines a limited slip differential at the front, AMG Adaptive Suspension, Race Mode, Performance Steering Wheel, and pushes the top speed to 167 mph. At the same time, the AMG Driver's Package is discontinued, and the AMG Performance Studio Package is dropped on the CLA45. Related Video:

Ecclestone wonders if F1's upcoming turbo V6s should get augmented sound [w/videos]

While every team on the Formula One grid is worried about making a good showing in this year's championship at the same time as they develop a brand-new car for next year's championship, Bernie Ecclestone and F1 circuit promoters have a different concern: how next year's cars will sound. The current cars use 2.4-liter, naturally-aspirated V8s that can reach 18,000 revolutions per minute and employ dual exhaust, next year's engine formula calls for 1.4-liter turbocharged V6s that are capped at 15,000 rpm and are constrained to a single exhaust outlet. Ecclestone and promoters like Ron Walker believe the new engines sound like lawnmowers and that the less thrilling audio will keep people from coming to races. If Walker's Australian Grand Prix really is shelling out almost $57 million to hold the race, every ticket counts. As a fix, according to a report in Autoweek, Ecclestone "suggests that the only way to guarantee [a good sound] may be to artificially adjust the tone of the V6s."
However, neither the manufacturers nor the governing body of F1, the FIA, think there will be a problem. Ecclestone fears that if the manufacturers "don't get it right" they'll simply leave the sport, but the only three carmakers and engine builders left next year, Renault (its 2014 "power unit" is pictured), Mercedes-Benz and Ferrari are so embedded that it would stretch belief to think they'd leave the table over an audio hiccup - if said hiccup even occurs. And frankly, these issues always precede changes to engine formulas, as they did when the formula switched from V10 to V8; fans, though, are probably less focused on the engines and more on the mandated standardization of the sport and the spec-series overtones that have come with it.
No one knows yet what next year's engines will sound like, but we've assembled a few videos below to help us all start guessing. The first is an engine check on an Eighties-era John Player Special Renault with a 1.5-liter V6 turbo, after that is Ayrton Senna qualifying in 1986 in the Lotus 98T that also had a 1.5-liter V6 turbo, then you'll find a short with a manufactured range of potential V6 engine notes, and then the sound of turbocharged V6 Indycars testing last year at the Indianapolis Motor Speedway. Any, or none of them, could be Formula One's future.

Paul di Resta returns to DTM with Mercedes

Some drivers manage to make the transition from one form of motor racing into another, and some run into trouble. Take Paul di Resta, for example. The promising young Scottish driver dominated Formula 3 racing in Europe in 2006, then moved over to Germany's hugely competitive DTM touring car series where he finished second in 2008, third in 2009 and first in 2010. But things didn't go as smoothly for Paul - cousin to retired Indy champion Dario Franchitti - when he moved in to Formula One with the Force India team.
In three years on the grid, he failed to score a single podium finish. Little surprise, then, that Force India opted not to renew his contract for this season. Left without a ride, di Resta is now going back to DTM with longtime supporter Mercedes-Benz, testing the new C-Class touring car today in Portugal. It's good news for Mercedes, which is celebrating 120 years in motor racing this season and, with 2005 champion Gary Paffett also on board, can now count two former champions on its DTM roster.
We wouldn't count Paul out of F1 for good, though. When he won the DTM title four years ago, he was also moonlighting as Force India's test driver, and we wouldn't be surprised to see him pull similar double-duty with the Mercedes F1 team (or another Benz-powered outfit) this year before spring-boarding back into grand prix racing in the future. At 27 years old, he may not have been the youngest driver on the grid this year, but he's still got a good few years ahead of him.