I've had my Audi A3 53 plate 2.0TDI (140 sport) for a few months now. Recently, the EMU light came on. There has been no effect on performance/fuel consumption at all. I have read a few things, like unplugging the battery for 30 minutes to see if the light clears etc. What would you guys recommend? In all likelihood, what is the light likely to be? Thank you all in advance, Steve.