subwoofers
(Alpine headunit) into C230 I'm currently driving (1998, not sure but believe it has standard sound system), that did wonders! the only thing is that those speaks can't handle the lvls my headunit can work on (if I got above 23 on the sound lvl the speaks distort, and the unit will go past 40!)I don't know much about your car, but from what I've seen on the C230, I'd do it in this order: Headunit, subs, speakers... or if you don't care much for base, get the speakers then the subs.
MB does have a decent sound system and good positioning of the speakers, but they are fairly weak compared to what is availible. Once you change the unit, it will drive your speakers at their limits, since they were designed for weaker factory sound, so basically if you change one thing, you'll mostlikely end up changing alot more







