What does MPH in a circle stand for when it pops up on the screen above the speedo
It's an speed warning symbol. You set a speed in the system and when that speed is exceeded, the warning lights up.
How do you set that MPH - I don't have owners manual
MPH and a lot more - http://www.audiworld.com/tech/elec57.shtml
Looking for a Used S4 in your area?
CarGurus has 930 nationwide S4 listings starting at $3,450.
Search Audi S4 Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Audi S4 Experts