All of your figures seem good to me my 335d (remapped) gives an average of 28.8mpg which has steadily risen from 26.4mpg after the remap
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C350 cdi sport estate facelift 457lbft
130i M SportMercedes C350 CDI Sport Estate AutoMini Cooper Auto.Mercedes E250 CGI,Lexus IS-F,R36, RS4 Saloon,ML 420 CDI SPORT,M6, 335d, C55, C32, M3, M5, S3, ALL SOLD but fondly remembered