2005 Mercedes-benz Cl500 Base Coupe 2-door 5.0l 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: liquid-cooled Tesla Supercharger, Acenta+ Leaf

A new video offers a close look at Tesla's updated Supercharger. Recently, Elon Musk spoke about the new charging station with a thinner, suppler liquid-cooled cable that is not only easier to manage, but has the potential to handle larger loads and offer quicker recharging. The first examples have been installed in Mountain View, CA, which we can see in this video. Besides the new cable, the new Supercharger also features a solid "button" on the charging handle as well as vents around the bottom of the unit. The video even shows thermal imaging of the new Supercharger, which shows the cable to be cooler than the cameraman usually records. See for yourself in the video above, and read more at Treehugger. Nissan has added a new trim level to the Leaf in the UK. The Acenta+ slots above the Acenta and just below the range-topping Tekna. It comes standard with the 6.6-kW onboard charger and Mode-3 32-amp (EVSE) cable. Using a fast charger, the Acenta+ Leaf can charge to 100 percent in just four hours. "We're delighted to add a new member to the Leaf family in the UK," says Nissan Motor GB Managing Director James Wright. "More than 9,500 Leafs have already been sold here and Nissan is the undisputed leader in the EV market. This new model delivers exceptional value and showcases the Leaf's incredible technology and engineering." Read more at Next Green Car. Mercedes-Benz Malaysia says its vehicles are compatible with B10 biodiesel blend. Malaysia recently announced a mandate for diesel to be sold blended with 10 percent palm-oil based biodiesel, after which, carmakers like BMW and Mercedes-Benz came forward with concerns over compatibility with their vehicles. "We have evaluated carefully the influence of B10 Biodiesel blends on our current diesel vehicles for the Malaysian market and we are now able to confirm its compatibility," says Mercedes-Benz Malaysia President and CEO Roland Folger. "We have service intervals of 12,000 km to ensure that our customers are not affected by the diesel quality. Our diesel-powered vehicles currently sold in Malaysia were seen to have run both smoothly and safely with the use of the B10 biodiesel blend." Read more from Paul Tan's Automotive News. Renault has honored its leading electric vehicle dealers with the 2015 Renault EV Awards.

Mercedes-Benz engines with 48-volt systems coming in 2017

As part of a big green push announced yesterday, Mercedes-Benz is jumping into the world of 48-volt power. The company will launch a new family of efficient gasoline engines next year and will begin rolling out 48-volt systems with it, likely in its more expensive cars first. Mercedes will use the 48-volt systems to power mild-hybrid functions like energy recuperation (commonly called brake regeneration), engine stop-start, electric boost, and even moving a car from a stop on electric power alone. These features will be enabled through either an integrated starter-generator (Mercedes abbreviates it ISG) or a belt-driven generator (RSG). (RSG is from the German word for belt-driven generator, Riemenstartergeneratoren. That's your language lesson for the day.) Mercedes didn't offer many other details on the new family of engines. There are 48-volt systems already in production; Audi's three-compressor SQ7 engine uses an electric supercharger run by a 48-volt system, and there's a new SQ5 diesel on the horizon that will use a similar setup with the medium-voltage system. Electric superchargers require a lot of juice, which can be fed by either a supercapacitor or batteries in a 48-volt system. Why 48-volt Matters: Current hybrid and battery-electric vehicles make use of very high voltages in their batteries, motors, and the wiring that connects them, usually around 200 to 600 volts. The high voltage gives them enough power to move a big vehicle, but it also creates safety issues. The way to mitigate those safety issues is with added equipment, and that increases both cost and weight. You can see where this is going. By switching to a 48-volt system, the high-voltage issues go away and the electrical architecture benefits from four times the voltage of a normal vehicle system and uses the same current, providing four times the power. The electrical architecture will cost more than a 12-volt system but less than the complex and more dangerous systems in current electrified vehicles. The added cost makes sense now because automakers are running out of ways to wisely spend money for efficiency gains. Cars can retain a cheaper 12-volt battery for lower-power accessories and run the high-draw systems on the 48-volt circuit. The industry is moving toward 48-volt power, with the SAE working on a standard for the systems and Delphi claiming a 10-percent increase in fuel economy for cars that make the switch.