Evening all, i've been off here too long and now typically i come back with a problem ! I havent driven the merc for about four months (lost it to my wife )but took it for test today as i forgot about it and it has failed on emissions. Readings are CO 0.041 (max 0.30) HC 94 (max 200 Lambda 1.084 (max 1.030) In fairness to the tester he tried it three times but couldnt get the lambda down ( i suspected the MAF to be honest but tried with it disconnected which then brought the lambda down but threw the other two to ridiculous levels so i assume the maf is working properly. Also it has code P0306 (misfire cyl 6 ) which is odd as i replaced all 12 plugs and leads along with a coil last year. It also hits a hiccup at 4000 rpm . Gutted is not the word as I love this car and so does my wife but i have to be sensible with what it is worth before i throw a wedge at it. Theres an indy about 5 miles from me (SK Automotive) but that would risk driving it with no ticket on. Any help would be very much appreciated.