Mini for long distances and sparingly sought

Hello, there may be some changes in my career and will therefore have to drive about 70km to work. The initial salary will also be a bit low, so I’m looking for a fuel-efficient diesel that looks good and has come across a mini. Does anyone have experience with a Mini One D? This:http://www.autoscout24.de/Details.aspx?… My questions are: I drive about 25% highway and 75% highway. How could the verb be about in normal driving mode? How far do you get with a Mini One D with a full tank? Do these models have any “mistakes”? Is such a mini suitable for long distances or should I rather consider something else? My budget would be around 14000 euros. Thanks for your help.