It hasn't changed mine as I was down there and had to come back but as I haven't refueled after getting here as yet I can't say how much the over all cost was.
I can however say I paid €1.42 ( $2.20)at Carrefour to fill up at the start and I paid €1.56 (2.42) when I re fueled in southern Germany. I saw €1.62
( $2.52)here as I left the highway here but wasn't sure if that was the top price or the normal price, I was more concerned with getting home safely as I only had about 800yds to go from the gas station.
The on board computer told me I was averaging 118 Kph or 72.67 MPH and 7.8 lt /100Km or 47.54 MPG per a US Gallon.
I just worked that out and have to say I have no more complaints about my car's performance except it's a bit slow on the uptake over 200 kmh
I am driving a 2008 Audi A4 S Line 2 Lt Diesel ,6 Speed manual gearbox unit.
I had a 5 speed Passat before and think it was quicker except for the top end where it could only do about 235 kmh full out no load.
I will post a total fuel price later when I have it.