Yes, just changing out the bulbs does make a difference. I searched different sites and this place is the cheapest. I got the PIAA 15660 headlights($52.95) and 15635 foglights($32.95). Both are the Super White platinum bulbs.
They don't have all info on their site, so just call them with the part #'s you want to buy.
Go here and pick mercedes from the drop down search list. Will return all benzes and what bulb style you have.
Don't buy from these guys, just use the page for the bulb info and car specs. They wanted $70 and I got them for $52 from accessconnect
good luck with the temporary solution