If carrying out your own service then to remove the anoying service light on start up then try this.
Press and hold the right button. (odometer reset)
now switch on the ignition
(oil lamp will not flash, but on at all times)
press the right button again
(insp is now displayed)
pull left button. (clock set)
(------ are now displayed)
Pull left button again
This works on my A4 tdi (110bhp) but should work on all.