Filter type Charcoal Filter. Engine GL 500 4-matic (164.886) Engine codes M 273.963 Production years 2006/09 - 2012/12 kW 285 hp 388 ccm 5461. Engine R 500 4-matic (251.072, 251.172) Engine codes M 273.963 Production years 2007/05 - 2014/12 kW 285 hp 388 ccm 5461.