new greek member in the team

i'am interesting in buying a new slk 200k or 350 in GREECE or broughted from germany so i'am intresting about the automatic gear box for 200k, is it good in performance? and if you need extra power is the buttons on the wheel good enought and fast for transmition. the question is the same for 200k and 350(v6) too, your experience my friends will be very helpfull for me thanx!