Ensuring that the air that gets into the engine for combustion will be clean and contaminant-free is primarily the job of the Mann Air Filter. Why the need to screen the air that enters your 1998 Mercedes ML320 engine? Is the regular air not enough for the engine to perform the right combustion process? Bear in mind that the engine of your Mercedes ML320 will need the right mixture of fuel and air in order to run. The cleaner the air used, the better the performance of the engine. And, that is exactly why you need to get the B1000-60598 Mann Air Filter. This functional filter will trap the dirt and other foreign particles in the incoming air, thus keeping them from entering the system and from possibly damaging the engine. And because the function of the filter is dirt trapping, do expect that it will get clogged after a long time, thus affecting its performance. If this happens to your stock filter, what you can do is to clean the part and reuse it again. But then, if you want to be sure and want to ensure that the device will perform efficiently, it is much better to get a new filter like the Mann Air Filter from our site.