If you really care for the performance and the overall status of your vehicle’s carburetor or injector system, it is a must that you make sure that the fuel that gets into the said system is clear and clean. You see, the moment you allow unfiltered or contaminated fuel to enter the carburetor of the injector, chances are these components will fail in due time! So just to be sure, it is a must to install a mechanism that will surely make way for clean fuel into the fuel system, a mechanism like the E1000-29273 Bosch Fuel Filter Clear. This particular fuel filter from the Bosch brand will surely fit your 1984 Mercedes 300SD. If your Mercedes has a fuel injector, you can find the fuel filter in the engine compartment. It can also be located under your auto on the frame and is a large canister that can handle fuel pressure exceeding 100psi. Among those vehicles with a carburetor, the fuel filter can be located at the inlet of the carburetor or the filter, or maybe in the fuel feed hose and will be a clear plastic type. Generally, what this part does is to trap the dirt, water, and other harmful contaminants that may cause problems to the fuel system. So if you really want to make sure that your Mercedes 300SD will run smoothly, one way to go is to have the Bosch Fuel Filter Clear.