Common fuse problems with Mercedes vehicles include a blown fuse, burnt fuse and broken fuse. Fuses often fail because of a serious electrical fault, so if you encounter these problems with your fuses, you must identify and check every circuit connected to that specific fuse.
On Mercedes vehicles, the series of circuits that affect a particular fuse are listed on the paper insert placed inside the fuse box. Remove the circuits one at a time to identify the source of the problem. You may have to purchase a handful of replacement fuses for this particular experiment. Once the source of the problem is identified, have it checked by an authorized Mercedes technician for repair or replacement.