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Mercedes-AMG to phase out 5.5-liter V8 after next year [UPDATE]

UPDATE: A previous version of this story indicated that AMG's 6.0-liter twin-turbo V12 was still mated to a five-speed automatic transmission, however the latest models (including the S65 AMG sedan and coupe, SL65 roadster and G65 sport-ute are equipped with the newer seven-speed unit. Mercedes also reached out to point out that the 5.5-liter engine will be phased out gradually, not overnight. There's a lot to love about AMG's 5.5-liter twin-turbo V8. It produces as much as 577 horsepower and 590 pound-feet of torque, and delivers blistering performance to even the heaviest of vehicles. But try not to get too attached, because like its 6.2-liter, naturally aspirated predecessor, it's not long for this world. The latest word comes from Autocar, which reports that Mercedes will release the last applications for the 5.5 biturbo within these next two calendar years in the new GLE63 AMG and upcoming S63 AMG convertible. After that, even though it was only introduced in 2011, it will be phased out. Fortunately Affalterbach has a worthwhile successor already in place in the 4.0-liter twin-turbo V8 from the Mercedes-AMG GT. The smaller powerplant, already in store for the new C63, is already producing 503 hp and 479 lb-ft in S spec. That's still shy of the larger unit's output, but where the 5.5 is nearing the end of its production cycle, the 4.0 is just starting out. Of course the 4.0-liter biturbo isn't the only engine AMG is making these days. Smaller models (based on the front-drive platform) employ the 45-designation, high-output 2.0-liter turbo four. Models at the very top of the lineup, however, use a 6.0-liter twin-turbo V12 that may be a dinosaur, but with 621 hp and 738 lb-ft of torque on tap, still can't be beat.

2016 Mercedes-Benz GLE-Class First Drive

The name has changed, but the song remains, well, mostly the same. The updated 2016 Mercedes-Benz GLE-Class (nee M-Class) is all about refinement and a new attitude. Further up the range things have gone all Daft Punk – harder, better, faster, stronger. Merc's bread-and-butter SUV was last revamped in 2012, and this redesign essentially grafts the company's new corporate face and tail onto the vehicle formerly known as ML. A two-bar grille runs the expanse between stretched headlights. Above them sits a more sculpted hood with dual power lines. Below all that is a bumper with three large intakes, similar to Mercedes' sedans. The sides are untouched, but in back you'll find a new LED taillight design and trapezoidal tailpipe finishers. On the AMG Line trim pictured here, the elements rendered in chrome on the base model – like the central guard in front and diffuser panel in back – are done in black. The interior changes start with the driver staring at a new three-spoke steering wheel front-and-center, and a larger, eight-inch infotainment display on the right. That screen stands proud of the instrument panel, with two vents flanking it to remind you this isn't a clean redesign. Compare that to the freestanding tablet look, like on the C-Class, and you'll get what we're talking about. Below the big screen are the infotainment and HVAC controls that we've been looking at since 2012. The center stack newness ends there. Below the big screen are the infotainment and HVAC controls that we've been looking at since 2012. They feel really old now – perhaps because these same dials and buttons were in the E-Class sedan in mid-2009. The controls on the console, however, are overhauled, with the glossy, swoosh-shaped COMAND controller taking up residence next to the driver's arm. Beside that are a few buttons controlling functions like ride height and hill descent control, as well as the new Dynamic Select knob. This dial controls up to six driving modes. There's Comfort, Sport, Slippery, Off-Road Light, and Individual. Buyers who opt for the Off-Road Package will get a sixth mode, Off-Road+. Mercedes expects only 10 percent of GLE customers will want that capability. Every GLE comes with the basic five-setting Dynamic Select knob, no matter which of the five engines are under the hood. Here's where things get tricky, so we'll list the details for the sake of clarity.

The biggest gas-guzzlers of 2024: 'The Meanest List' is the opposite of greenest cars

In some circles — especially some automotive circles — bigger is better. This explains the Hummer, for example. In its so-called “Meanest List” of a dozen models, the American Council for an Energy-Efficient Economy (ACEEE) makes no apologies for berating “the worst-performing mass market automobiles” sold in 2024 in the U.S. The most diminutive car on the list is a Chevy Corvette Z06. At the top of this particular heap is the Mercedes-Benz AMG G63, a gas-powered SUV that the environmental agency says was “the worst-performing vehicle of the more than 1,200 models assessed by Greener Cars and has an annual fuel cost over $4,000.” Not to mention its MSRP of around $184,000. Rank Make & Model Powertrain Green Score MSRP Estimated Annual Fuel Cost* 1 Mercedes-Benz AMG G63 Gas 20 $184,000 $4,242 2 Ram 1500 TRX 4x4 Gas 22 $98,335 $3,819 3 Ford F150 Raptor R Gas 24 $79,975 $3,777 4 Cadillac Escalade V Gas 26 $152,295 $3,388 5 Dodge Durango SRT Gas 26 $74,995 $3,332 6 Jeep Wrangler 4dr 4X4 Gas 27 $35,895 $3,260 7 Jeep Grand Wagoneer 4x4 Gas 28 $91,945 $3,058 8 Mercedes-Benz G550 Gas 28 $143,000 $3,186 9 GMC Hummer EV SUV EV 29 $98,845 $1,746 10 GMC Sierra Gas 29 $37,700 $3,069 11 Chevrolet Corvette Z06 Gas 30 $114,395 $3,169 12 Mercedes-Benz Maybach S680 Gas 30 $234,300 $3,031 *ACEEE analysis using EIA data of the annual cost of driving 15,000 miles In terms of numbers, the dirty dozen of the meanest includes seven SUVs and three trucks. Lonely at the middle of the list is the sole electric, the GMC Hummer EV, which weighs in at 9,000 pounds. The council notes that “though EVs have lower emissions than similarly sized gasoline models, the Hummer demonstrates that size and efficiency, not just fuel source, are important factors in a carÂ’s environmental impact.” ItÂ’s also worth reminding prospective buyers that the average fuel cost of a vehicle on the “Greenest List” eats up only a fifth of the fuel cost of a vehicle on the Meanest List, “showing that greener options can also be more affordable.” The ACEEE also put out a "Greener List" of efficient gasoline and hybrid cars that don't require plugging in.  By the Numbers Green Cadillac Chevrolet Dodge Ford GMC Hummer Jeep Maybach Mercedes-Benz RAM Emissions Fuel Efficiency Green Automakers Truck SUV Electric Hybrid