CLK Cabrio – W208 or W209?

Hello, after the disappointment with the new E-Class (just going back to DC because only broken) I think about a CLK convertible – just what? I have offers for annual cars with a few km – I don’t want new cars anymore, I’m not a test driver for DC – once the model W208 as CLK 200 and 320 V6 and on the other hand a 200 W209. Who knows both models and can tell me what one should pay attention to or are there known defects? I don’t want to have to change again after a short time… Thanks e in advance