All four of my Mercedes V6 diesel cars have comfortably exceeded their extra-urban figures. (Including the ML) So it certainly is possible.
However, my journeys are not typical of most users. I have a head start by living in the flat and uncrowded Norfolk and most of my journeys are at least 100miles. My wife, using the same car, can return a figure 40% worse for her city commute.
Extra- urban on the CLS is quoted at 47.9. My overall figure for the last 2000 miles is 44mpg and I have seen this.....and yes! I've checked the acccuracy of the meter

However, my journeys are not typical of most users. I have a head start by living in the flat and uncrowded Norfolk and most of my journeys are at least 100miles. My wife, using the same car, can return a figure 40% worse for her city commute.
Extra- urban on the CLS is quoted at 47.9. My overall figure for the last 2000 miles is 44mpg and I have seen this.....and yes! I've checked the acccuracy of the meter

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