Thank you but it's not M104 E320, it's a M112
Indicated fuel economy on a mixed-driving trip (~3/4 highway, 1/4 city) was 11.3 liters/100 km. That was before the tune-up of today
I should try a bit more highway driving to see how it performs, but by now I'm pretty sure the computer's calculations are fouled up by crawling, stop-and-go traffic
Later Edit:
- mixed driving, ~3/4 highway, ~1/4 city: 11.3 l/100km
- mixed driving, ~1/2 highway, ~1/2 city: 14.2 l/100km
- city heavy traffic, not crawling: 17-18 l/100km
- >2000km of mixed driving, ~3/4 city heavy traffic, ~1/4 highway: 14.3 l/100km
~Nautilus