Economy, Comfort, Automatic, Dynamic... all mode options on the MMI car setup screen - but what do they do?
Sure, Economy makes the gear number appear as 'E4' 'E7' etc. (mine's an automatic) and it can coast if you take your foot off the accelerator (under some circumstances).
Automatic gears are presented as the normal 'D3' 'D6' etc.
Dynamic gets into the sports gear settings 'S4' 'S5' etc. that are also accessible by pulling back on the gear selector stalk.
OK, so all that's clear and obvious. My question is 'what (if anything) do these different modes actually make to anything else in the car's setup?
Am I imagining that 'E' makes the car just be less responsive when accelerating?
Does 'Comfort' make the car wallow and have less distinct steering, but also soften the ride? etc. etc.

Does anyone out there know what these settings are supposed to do please? Or are they actually just smoke and mirrors?
Many thanks!

btw... 65-plate A6 FL 2.0 S-Line Ultra auto