I have looked in my manual to see how you turn this on and it only shows you how to do if you have the sat nav screen so can only assume that if you haven't need to have it programmed by dealers. If it was working before it went into dealers and now its not would take it back for them to do. I have sat nav in mine but did try using the indicator switch and going through settings on rev counter display but didn't give me options for indicators settings sorry couldn't solve problem for you.