Mercedes-Benz CL63 AMG gets new engine, more power.

Last month Mercedes had told that it is coming with the refreshed design of its coupe. The tweaks includes larger headlamps, a restyled grille, more heavily contoured hood and re-profiled bumpers .

Here is the good news for the zappers. The most significant changes is that is going to replace CL63 AMG's naturally 6.2-liter V-8 engine, to the new model sports a more powerful twin-turbocharged 5.5-liter V-8 as previewed at the Geneva Motor Show earlier this year.

With 536 hp at 5,500 rpm and 590 lb-ft at 2,000 rpm in its standard state of tune, the new AMG is considerably more powerful than its larger capacity predecessor.

It is likely to be available in the United States in November.

Mercedes-Benz claims the new 4,542-pound CL63 AMG hits 60 mph in 4.4 seconds and has a top speed of 155 mph -- or can improve to 4.3 seconds and 186 mph, respectively, when running the optional performance package. With new fuel-saving features such as automatic stop/start and an improved brake energy regeneration system that serves to automatically decouple the alternator under acceleration, it's also claimed to improve fuel economy considerably.

Meanwhile, the revised version of the CL65 AMG also is coming. It receives much of the same visual changes but retains its existing twin-turbocharged 6.0-liter V-12 engine with 621 hp and 738 lb-ft -- sufficient to endow the big 4,784-lb coupe with the same 0-60 mph time of 4.4 seconds and a 155-mph top speed as the new CL63 AMG.

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