Sebo Main Dealer 
6191ER - AIRBELT K/C2/C3 Pre-Motor Microfilter Genuine Sebo Part
Pre-motor electrostatic microfilter which protects the motor and gives S-Class filtraton.
Suitable for K1, K1 KOMFORT, K1 PET, K1 ECO, K1 KOMFORT ECO, K1 PET ECO, K3 VULCANO, K3 PREMIUM, C2, C2 TOTAL, C3