Am i being thick?

[alastairm]

How do you reset the computer that displays avg speed, avg consumption etc etc on a 2001 M5 with no Nav? I had one before with the Nav and you did it on the screen and in other bmw's you just hold the stalk in that says BC but when i do that it flashes up 'Prog'
Any ideas please-ive read the handbooks twice but can't see a reference to it!
thanks