Do it yourself, change the tail light bulbs on your Mercedes Benz C230 made in 2001, 2002, 2003, 2004, 2005, 2006 and 2007. To be able to make the replacement you will not require tools or special skills, only new compatible light bulbs from the store. You can do the repair with your bare hands in about 5 minutes.
In the beginning you need to open the trunk of your car and look for the cover on the image below and remove it. You can do it very easily using your fingers.
After you do it, you will gain access to the tail light bulb panel, as shown in the next picture. You will have to detach it and, in order to do that, you will have to unplug its harness and rotate the plastic knob that holds it counterclockwise.
At this point you can simply replace the damaged bulb or bulbs. Be careful and do not touch the surface of the replacement bulbs because it is known that the grease on your hands can shorter their lifetime. After that, assemble everything back together as it should. Install the bulb panel, secure it with the knob, plug the harness back and rearrange the cover on the trunk. This is what you have to do, if you need to change the tail light bulbs on your Mercedes Benz C230 manufactured between 2001 and 2007.