No idea with GAP, sorry. With Nanocom's Genesis you can find and edit it in the CCF file. I'm sure there'll be a way with the GAP tool.
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You didn’t read my post [emoji6]
On a D3 you ONLY adjust the tyre radius.
What is a ccf?
sounds like a fire extiguisher.
Car Configuration File. It is the primary binary file that contains the parameters of the car and is referenced by other ECUs. Each ECU has it's own software version, too.
There are some parameters that you can edit if you have a suitable tool, like a Nanocom or a GAP.
You can do simple changes like removing the leading zero on the odometer (up to 100,000kms) so that it displays 75028km instead of 075028km. Or more tricky stuff like calibrating the speedo on a D4 or adding new features to your car like upgraded sound systems or even an e-diff (but you also need the hardware, wiring and upgraded ECU software and a bit of luck as well).
OK reset!
The vehicle is a 2015 D4 with Pirelli 255/55/19 tyres.