What's the 2009 mercedes c300 headlight bulb size?

The 2009 Mercedes Benz C300 is going to need to use a H7 bulb for both it's low beam headlight and it's high beam headlights. A single replacement bulb is going to cost between $10 and $25 depending on where You shop. I would go ahead and go with the higher priced ones as they are better quality and this isn't really something You want to go cheap on. In order to replace the bulb You're going to need to open up the hood and then undo several bolts on the headlight assembly. Once You remove them You'll be able to take the cover off and then switch out the bulbs.