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Daytime running lights, sometimes referred to as DRLs or DTRs, are lights that switch on automatically when your 2009 Mercedes-Benz C300 is turned on and in drive. Since the daytime running lights are on whenever you are driving your C300, they are often the first bulbs to burn out. The video above shows you how to change the daytime running lights in your 2009 C300. These bulbs grow dimmer by over 20% over time, therefore we recommend changing both bulbs on your C300 at the same time, even if only one bulb is burnt out - this will allow both DRL bulbs to have the same intensity and prevent the old DRL bulb from appearing dimmer than the new one.
When you change the daytime running light on your C300, it is important not touch the glass part of the bulb with your fingers because the oil from your fingertips will cause that part of the bulb to burn hotter, which significantly shortens the life of the bulb. Some studies indicate that driving with your lights on can reduce accidents by 18 - 34%, driving with your DRLs or headlights on the day can reduce your chance of getting in an accident.
On many cars, the high beam bulb runs at reduced power during the day - check 'em and change 'em!2009 Mercedes-Benz C300 Sport 3.0L V6
Did you know that heat is worse for your battery than cold? Replace it every 4 years2009 Mercedes-Benz C300 Sport 3.0L V6
Because you have to start somewhere2009 Mercedes-Benz C300 Sport 3.0L V6
Leaking coolant is usually a sign that your water pump needs to be replaced. This video shows you how to quickly plug it2009 Mercedes-Benz C300 Sport 3.0L V6
Coolant hoses wear out over time and need to be replaced - check 'em early and often2009 Mercedes-Benz C300 Sport 3.0L V6
Help keep your car as responsive as you are by maintaining proper power steering fluid levels2009 Mercedes-Benz C300 Sport 3.0L V6