How much fuel does your car REALLY guzzle?

This is for Europe, but still… We have higher standards here.


Retired and live in FL. Right now my Mercedes 2014 E250 diesel show an average (hwy/town) of 29mpg @ average of 21mph. The best I have ever done was in the mountains of NC 53mpg. I admit it was for a short distance but I can get 47mpg on Route I95 which is rather flat in FL.
The VW debacle is going reduce that average come March, I have a GLC300 FWD on order. Think It’s going to be awhile before MB imports diesels to the US.