2008 MERCEDES-BENZ C63 AMG

What it is: A high-performance version of the recently introduced C-class with a large V-8 stuffed under the hood.
Why it's important:it will be the most affordable car in mercedes-Benz's extensive AMG lineup of performance vehicles.
Powertrain:Likely to get the same 475-hp, 6.2-liter V-8 and seven-speed automatic you'll find in the CLK 63 AMG convertible.
Competition:Audi RS4,BMW M3, Cadillac CTS-V,jaguar S-type R.
What might go wrong: Mercedes will probably make the stability control undefeatble,and the C64 AMG just might understeer liks its forebear.
Estimated costs and arrival:Look for the C63 AMG this fall at the Frankfurt auto-show-it could go on sale soon after,in the $60,000 ballpark.

2011 AUDI A7

What it is:Audi new four-door will slot into the lineup between the A6 and A8.
Why it's important:The very elegant A7 is designed to compete with the Mercedes-Benz CLS.
Platform:It's based on the next generation Audi A6,which will have its longitudinally mounted engine set farther back to improve weight distribution.
Powetrain:The A7 will shareits engines with the upcoming A6.That means a 3.2-liter naturally aspired direct-injection V-6 with at least 265 horsepower and a new turbocharged 3.0-liter powerplant making 300 horsepower.Later,as S7 is planned with a 5.2 V-10 FSI engine and 460 horses.A six-speed automatic as well as the DSG will mate with Audi;s Quatttro system.
Competition:BMW6-series,Mercedes-Benz CLS-class.
What might go wrong:The four-door "coupe" segment is growing rapidly,so by the time the A7 arrives,it could face heady competition.Even the upcoming VW Passat four-door coupe might eat into sales of the A7.
Estimated arrival and costs:The A7s first auto show will be Frankfurt in the fall of 2009.It should go on sale in 2010 as a 2011 model,costing between $50,000 and $65,000.