There were two "generations" of this model; 1996-2003 & 2004-2009.
Most models come with either a V6 (CLK320) or a V8 engine (CLK500), with the CLK55 AMG boasting a 5.4L V8.
Considered by many to be a very reliable, somewhat reasonably priced Mercedes. Both generations have gorgeous front grills, stylish lines, 17" alloy wheels, and most come with bi-xenon HID headlights (among numerous other options).
"Is that Mercedes-Benz CLK320 a coupe or a convertible?"