2008 2009 2010 2011 2012 2013 2014 Mercedes Benz C300 2009 C300. Resetting the service light indicator. Certified Used Car Technician @ Toyota .\rbr\rbrEasily reset your service A or service B indicator on you Mercedes Benz. Very useful if you do your own service, or use a non-dealer shop. Follow the easy steps .\rbr\rbrHow to reset service A or B indicators on your Mercedes C class, useful when you change your own oil.\rbr\rbrThis video is the step-by-step process that I follow to reset the service indicator on my 2009 Mercedes C300. This works great if you do your own maintenance.