Mercedes w211 Cabin Air Filter Charcoal Activated right in engine comp pollen Cabin Air Filter Charcoal Activated Located in the right side of the engine compartment, near the starter battery. Brand NEW part with full 1 year warranty. Mercedes part# 211 830 00 18, check fit below. Recently made by CORTECO-MICRONAIR (OEM), not been lying around. Please see FITMENT CHART below, under PRODUCT DESCRIPTION. Email us your VIN for any questions.