The Mann Air Filter that you can get here in our site is one performance part that will surely be of big help to your 1994 Mercedes S420. Though it may not equal the benefits that the other performance parts in your Mercedes gives, like the exhaust components, you still have to give the B1000-30136 Mann Air Filter the credit that it deserves. You see, the moment you install this particular filter in the engine compartment of your Mercedes, it will effectively screen out the dirt and other particles that usually come with the air that enters the engine for combustion. Thanks to the filter, cleaner and fresher air is being sent to the engine, contributing to its proper and optimum performance. The Mann Mercedes S420 Air Filter will keep the optimum composition of air-fuel mixture that will ensure consistent engine performance. So if you want to keep the service life of your engine for a long time, equip your Mercedes with the Mann Air Filter. Remember though to regularly clean the filter to keep it from prematurely failing. If the filter gets too dirty, your engine will not be able to suck enough air into the combustion chamber. If this happens, your vehicle will run roughly and will lose power. And if a clogged air filter is neglected for a long time, your Mercedes S420 may stop running altogether.