I've never been to worried about the MPG on my cars as I've only ever had V8 and AMG's. As a lot of you know I have a S-Class 500L which I have had from new ( 2008 ) and mainly drive it in London, due to my job. Since my Semi-Retirement I have done a few jobs out of town. Yesterday I drove up to Thetford about 130 miles, left at 06.00 via M25 - M11 and A11. It was early I know. I averaged 64mph and the mpg was 34.8 which I thought was not bad as it has now done 162,000 miles.