The air that goes into your vehicle’s engine is significant to the overall operation of your auto. However, do you know that this same air may contain abrasive contaminants that in the long run may affect the engine and your driving performance? This is true, and as a driver or vehicle owner, you should make sure that the air that flows into your auto engine is clean and pure. If this is what you want, better install the Mann Air Filter that our online site supplies and carries. This particular B1000-12087 Mann Air Filter will effectively trap the dirt particles which may cause damage to the engine cylinders, walls, pistons, and piston rings. The product will also play a key role in keeping the contaminants off the airflow sensor and in cleaning the air that enters the crankcase ventilation. And as an added bonus, this functional device will also serve as a silencer for your 1985 Mercedes 300SD’s intake system. Better remember that one sure way to ensure the performance of your vehicle is to check the filters installed in it, like the air filter. If you think your stock filter is clogged or may need a replacement, just visit our site and scan our online catalog. We carry the B1000-12087 Mann Air Filter that is sure to match your 1985 Mercedes 300SD.