How to check Mercedes W123 Fuses - iFixit Repair Guide It's important to check the fuses on your W123 car, especially if you haven't in a long time or if the car is new to you. A blown fuse can often be the culprit for what seems to be larger electrical problems. Additionally, there are certain kinds of fuses that do not work well in the W123 fuse box Mercedes E class w123 (1977 - 1985) - fuse box diagram Dec 05, 2015Mercedes E class w123 (240D, 300D, 300TD, 280E and several other models of Mercedes copes, sedans and wagons from model years 1977 – 1985) – Mercedes Fuse Box Lid W123 - DieselMercedes OE Mercedes Used Fuse Box Lid. Good condition, no cracks or major flaws. Will have scratching and minor flaws from normal use. Inner diagram card in legible shape with standard stains and weathering. Removing a W123 Fuse Box Cover - MercedesSource mercedessource Tech help - Talk about a Chinese jig saw puzzle. Kent can show you the trick Removing the fuse box cover on the 1977 to 1985 W123 chassis can be a little frustrating. You can not pull it straight off nor can you push it straight back on. If you are not careful you can break the edge of the cover or crack the center section.