you use your cruise control switches to control the programs. The security coding is customizable with a four digit pin code that you activate thru the use of the cruise control switch also. It sounds a bit confusing, but in practice it's pretty easy. After your APR dealer has set it up for you, you can then go in and change your pin number. It's pretty much all explained here in the EMCS section:
http://www.goapr.com.au/products/ecu...guan20tsi.html
Fuel consumption readout is still accurate (well, as accurate is it ever is).
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