Cars Review : Mercedes AMG 53 | Inline six turbo hybrid and a bounty of tech
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Mercedes-AMG this morning revealed details of a new model designation the AMG 53-series for the CLS and the E-Class Coupe and Cabriolet. Two words were the first to catch our eye: inline six. The AMG CLS53 and two variants of the AMG E53 are coming to the U.S.. We thought the new inline-six engine would arrive in the CLS but we didn't realize it'd be an AMG. That's a nice bonus.
The AMG 53 line takes the new 3.0-liter inline-six that debuts on the CLS450 in Europe but breathes on it some more. Originally this engine made 362 horsepower and 369 pound-feet of torque but when AMG is through with it it's pumping out 429 horsepower and 384 pound-feet of torque. The like the non-AMG version the engine is turbocharged and has an electric auxiliary compressor that eliminates turbo lag. And its mild hybrid system's EQ Boost starter-alternator can throw in an additional 21 hp and 184 lb-ft of torque momentarily. That unit is fitted between the engine and AMG's Speedshift nine-speed transmission all of which delivers power to the car's Performance 4Matic+ all-wheel drive.
You can tell an AMG 53 by its twin-blade silver-chrome grille which was previously reserved for AMG V8s. Behind the blades is black lattice. The 53 also has an A-wing front bumper with silver-chrome front splitter and side curtains to reduce drag and direct airflow. Air intakes feature horizontal silver-chrome fins and the car wears AMG side sills. Around back there's a diffuser and chrome exhaust tips and the taillights emphasize the car's increased width. The body-color deck lip can be optioned in carbon fiber. A CLS 53 has 19-inch aero wheels standard and 20-inchers are an option.
Mercedes says the AMG CLS 53 accelerates from zero to 60 mph in 4.4 seconds.
More about the 48-volt hybrid system: In addition to powering the starter-alternator and the auxiliary compressor it powers the conventional 12-volt system using a DC/DC converter. Mercedes says because of the overall greater battery capacity the same power can be provided with only a fourth of the current of a conventional electrical system so wiring can be thinner and lighter. The starter-alternator also contols idle speed start-stop and it features a gliding mode that lets the vehicle coast to save fuel.
The starter-alternator also means there's no more belt assembly at the front of the engine making it easier to fit the inline six and creates room at the engine for an after-treatment system for exhaust gas.
Inside dual 12.3-inch high-resolution screens under one shared glass cover merge to form a widescreen cockpit display that places virtual instruments before the driver and extends to the center of the console. The driver can choose one of three display styles — Classic Sporty and Progressive — and can customize the information and views to personal preference everything from oil temp to engine output to lateral and longitudinal acceleration.
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