2010 Mercedes-benz Sprinter on 2040-cars

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Automakers' sound systems: Crank it, don't yank it

Years ago, one of the first things most music lovers did after buying a new vehicle was drive to an aftermarket stereo shop to get the crappy stock components swapped for better gear. And you'd typically get not only better sound but also more bang (and boom) for your buck. But in the past decade or so, the overall quality of OEM audio has dramatically increased, while car electronics became more complex, removing the incentive for most new vehicle owners — and all but the most hardcore DIYer — to start from scratch. In 2010, I did a comparison of the average costs for OEM electronics vs. similar offerings from the aftermarket, and back then automakers' stock premium systems were by far the best bargain — and are probably an even better value now. The premium 14-speaker, 1,200-watt JBL system in the all-new 2019 Toyota Avalon is a prime example of this trend. It's standard on the top two Limited and Touring trims and is available as a $680 audio upgrade on the XLE and XSE. I doubt you can even buy 14 speakers and 1,200 watts of amplification from the aftermarket for 700 bucks, much less have it all installed. And because the system is bundled with Toyota's Entune infotainment system, Apple CarPlay and a surround-view camera, removing the head unit means you would likely lose these features. Another advantage of OEMs and their audio partners is they can design the car around the audio system. In the past, automakers would typically place speakers where convenient for packaging, not for optimal sound reproduction, and audio engineers were forced to compromise. But as with the Avalon's premium JBL audio system, this is starting to change. At a recent behind-the-scenes peek for media into the process of developing the system, Toyota and Harman engineers delved into the minutia of sealing the inner panel of the front doors to create an enclosure for 6x8-inch woofers, making space in the pillars for JBL horn tweeters and extensively measuring the acoustic properties of the interior to tune the sound to the space. I'm met some creative and skilled car stereo installers, but none with a degree in psychoacoustics. The system is also the first to feature Quantum Logic Surround that creates a multi-channel listening experience from two-channel sources. And it includes Harman's Clari-Fi processing that "rebuilds key details lost" in compressed audio formats used by streaming music services and MP3s.

Recharge Wrap-up: Innova EV Car Share, Mercedes to use CO2 A/C

Innova UEV will launch its carsharing program at the Association for the Advancement of Sustainability in Higher Education 2015 Conference & Expo. Called Innova EV Car Share, the program is designed for college campuses, and uses the Innova Dash neighborhood electric vehicle and solar charging stations. "The Innova UEV team is excited to introduce this innovative sustainability program to universities across the country as a way to reduce CO2 output as well as decrease congestion," says Innova UEV Founder and CEO Roman Kuropas. "Visionary schools that make this level of commitment to the environment are sure to add to their sustainability prestige as leaders in higher education." Read more in the press release from Innova UEV. Microsoft and ABB are launching a new EV fast-charging services platform. ABB chargers will connect to the Microsoft Azure cloud, allowing for smarter charging as infrastructure expands. "Platform performance and stability are critical differentiators for the successful operation of a modern, data-dependent EV charging station," says ABB's Pekka Tiitinen. "By partnering with Microsoft, ABB will be able to offer best-in-class operations as well as innovative advanced services - what we call the Internet of Things, Services and People." Perhaps we'll hear more specific details following the platform's launch at eCarTec in Germany. Read more from Microsoft. Honda is testing solar-powered EV charging in the Marshall Islands. The AC charging stations, called the Honda Power Chargers, will help power a fleet of Fit EVs on the remote islands as part of a pilot test. The Marshall Islands must import most of their energy supplies, so solar-powered mobility would help provide some self-sufficiency and cost savings. Honda, the Marshall Islands government, and the Japanese Ministry of Economy, Trade and Industry will use the experiment to determine if it would be worthwhile to expand the solar-powered charging infrastructure. Read more at Green Car Reports. Mercedes-Benz will use CO2 air conditioning to help meet the EU's 2017 environmental requirements. The European offerings of the S-Class and E-Class will be the first to use a CO2-based air conditioning system. The use of CO2 requires a redesign of much of the system, as it requires a much higher pressure than other refrigerants. The automaker will use the HFO-1234yf refrigerant in its other vehicles.

2015 Mercedes-Benz ML400 Quick Spin

Mercedes-Benz has taken a risk in its quest to downsize its engine range. For 2015, the brand's popular M-Class five-passenger CUV did away with its trusty 4.4-liter, twin-turbocharged V8, and has replaced it with a 3.0-liter, twin-turbocharged V6. It's no surprise that power is down thanks to this move. Outputs of 402 horsepower and 443 pound-feet of torque are replaced by 329 hp and 354 lb-ft, but weight is down significantly as well. The new ML400 is nearly 300 pounds lighter than the 4,982-pound ML550. Will that tradeoff be enough to satisfy a buying public that's embraced falling fuel prices by buying bigger and thirstier vehicles? To find out if the blown V6 is a suitable replacement for the twin-turbo V8, we spent a week at the helm of the all-new ML400. Driving Notes This 3.0-liter, twin-turbocharged V6 is the same engine being offered in the C400 and E400 sedans. Typical of today's turbocharged engines, peak torque is spread lavishly across the rev range, from 1,600 to 4,000 rpm. That's not as generous a spread as the ML550, which offers all its torque between 1,600 and 4,750, but the power on offer is easy to access. Importantly, the new V6 never feels flat-footed or unable to answer our commands. In fact, the ML400 feels even quicker than its six-second sprint to 60 would indicate, although it's not so fast as to challenge the 5.3-second time of the ML550. After a slight and expected bout of turbo lag, the power arrives suddenly and proceeds linearly until just south of the engine's 6,500-rpm redline. The throttle response is soft in Eco mode, as expected, but sharpens up slightly when the fuel-sipping mode is off, where the gas pedal is still easy to modulate. It's a quiet engine, too. Compared to the brawnier exhaust note of the old ML550 or the howling six-cylinder in the BMW X5 xDrive35i, the ML400's note is smooth and refined, befitting of a V6. Its turbocharged nature is instantly noticed, though. Get on the throttle and the 3.0-liter happily hisses its way up the tachometer. But, it's only when you get on the throttle hard that the engine really weighs in. In day-to-day driving and traffic its soundtrack is unobtrusive and relaxed. The EPA rates the ML400's fuel economy at 18-miles-per-gallon city and a 22-mpg on the highway. That's better than the 14 city and 19 highway of the old V8 ML, but it still seems a bit low, especially for the highway figure.