1.A graphite impeller within the vacuum pump fails causing vehicle faults.2.Sometimes water ingress can cause problems with these pumps, often however the impeller on the spindle of the motor can break or shatter over time.3.A broken impeller will cause a lack of air pressure \/ vacuum to be provided meaning actions of the pump will be inhibited.4.It can also lead to a jammed motor which will lead to the pump blowing the 20A fuse and shutting off.Common associated fault codes:B1436-012, B1436-014, B1436-015, B1436-016,B1436-017, B1437, B1438-011, B1438-012, B1440,B1442-012, B1442-015, B1442-016, B1442-017, B1442-018.Condition: Brand NewItem Type: Vacuum Pump ImpellerReplacement part number:A2308000648, A2308000548, A2308000448, A220800348 A2208000648, A2208000748, A2208000548, A2208000848, A2208001148, A2208001248, A2208000948Fitment:Fit for SL-Class (R230) 2001-2011Fit for S-Class (W220) 1998-2005 S280, S320CDI, S320CDI L, S350, S350 L, S400CDI, S430, S430 L, S500, S500L, S500 4-, S600L, S55 , S55 LFit for -Class (C215) 1999-2006 CL500, CL600, CL55AMG, CL63AMG, CL65AMGColour:blackMaterial:carbonPackage Contents:9 x Vacuum Pump ImpellerOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.