K&N 33-2181 Air Filter Set for Mercedes R-Class W251 – R350 R500 (Set of 2)

Pair of K&N 33-2181 washable, reusable high-flow drop-in air filters for the W251 R-Class. Layered oiled cotton gauze media replaces the disposable paper element — more airflow, and the last filter the vehicle will need.

Your R-Class takes two. The W251 runs a twin-airbox layout, so this listing is a matched pair.

Fitment — R-Class (W251, 2006–2012)

Specification

• K&N part number 33-2181 · quantity 2
• Oiled cotton gauze media — washable and reusable
• Panel dimensions 13.69″ × 5.19″ × 1.25″
• Drop-in fit to the factory airbox, no modification
• K&N no-hassle lifetime limited warranty

Diesel R 320 CDI and R 350 BlueTEC use a different filter — send us your VIN and we will confirm before you order.