Listed by Mercedes as a "relay unit"
Part number: 0005400172 is a new, unused OEM Supplier fuse box.
At FCP, "OEM Supplier", "OEM" and "Original Equipment Supplier" all mean the same thing. OEM Supplier means it is the same company that made the parts for your car when it was built, and it is also the same company that makes the replacement parts available from your local car dealer as "Genuine", just expect you will pay less at FCP.
FCP Euro is a leading online retailer of Original Equipment (OEM) and Genuine replacement parts for European cars. Starting as Volvo specialists in 1986, FCP Euro now offers coverage for all European makes including Volvo, BMW, Mercedes, Audi, Saab and VW.
FCP Euro provides one of the most accurate online automotive parts and accessory catalogs on the web backed with a lifetime warranty on all products, free shipping, hassle free 365 day returns, and a call center available to help you through any repair or replacement parts purchase.