Are you not concerned about warranty implications? The latest VW ECU systems can detect these addon systems apparently. Even if you remove them for servicing.
Are you sure about your statement? The tuning box is not reflashing the ECU so how can VW detect it once removed? DTUK claim that it is totally undetectable when removed.
I hope you also tell your insurance company. Remember you may not be in a position to remove after an accident.
I had a DTUK tuning box and pedal box on my Diesel Octavia VRS and there was a noticeable improvement in response and and small improvement in fuel economy. I think the pedal box did more for improving the 'feel' of the car.
I've yet to check on the Arteon but the Skoda Superb has a soft throttle response set in the ECU. Using VCDS/OBDEleven its possible to set it to 'Audi' which makes the superb much more responsive.
That is interesting! I have used Vagcom (VCDS) with great success a number of years ago. Even changed my ex Singapore Ford Galaxy's speedometer reading from km to miles and reset the autobox when all gears would not upchange. However unless you confidently know what you are doing it can however be a risky subject...it only takes one change of a value in a novices hands! It would be nice to be able to deactivate the stop/start function other than having to manually switch it off every time when switching on the engine