We'll the volvo is a heavy safe piece of crap, F that, the G35 has way more horsepower so that's outta the pic, the c230 is a piece of garbage and the BMW is crappy too being that they freakin break all day!!!!!!!!!!!!!!!!!!. I am so tired of all this BMW ish. Go home with that ish. BMW's look good but they are unreliable piece of turd. M3 SMG, 5 Series and the new 3 Series. Wait and see how many problems this new 3 series has. Every new body style they come out with is a complete piece of crap. I guess you love it if you prefer looks over reliability.!!So I guess nothing would compare. JMO
i'd say the 325i or the 2006, mercedes c250 (looks just like the 05 one but with a 2.5 L v6 at about 200hp, instead of the supercharged i4 in the current one) if you are talking about the 2006 is250.
if an 2006 is350, obviously the 330i, and also the c350 2006 model, for power i guess the g35 qualified , but i own a 2005 g35 and the interior just doesnt compare with those other 3, nor the road noise etc its probably not quite luxury enough to compare with an IS250/350